GOST R 54922-2012

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  ГОСТ Р 54922-2012

GOST R 54922−2012 zinc Concentrates. Specifications

GOST R 54922−2012

NATIONAL STANDARD OF THE RUSSIAN FEDERATION

CONCENTRATES ZINC

Specifications

Zink concentrates. Technical specification

OKS 77.120.30
OKP 172111

Date of introduction 2014−07−01

Preface

1 DEVELOPED by the Federal state unitary enterprise «State scientific-research Institute of nonferrous metals «GINTSVETMET» (FSUE «Institute «GINTSVETMET»)

2 SUBMITTED by the Technical Committee for standardization TC 373 «non-ferrous metals and alloys"

3 APPROVED AND put INTO EFFECT by the Federal Agency for technical regulation and Metrology of June 27, 2012 N 127th St

4 INTRODUCED FOR THE FIRST TIME


Application rules of this standard are established in GOST R 1.0−2012 (section 8). Information about the changes to this standard is published in the annual (as of January 1 of the current year) reference index «National standards» and the official text changes and amendments — in monthly information index «National standards». In case of revision (replacement) or cancellation of this standard a notification will be published in a future issue of information index «National standards». Relevant information, notification and lyrics are also posted in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet (gost.ru)

1 Scope

This standard applies to zinc concentrates produced at enrichment of zinc-containing ores of non-ferrous metals and is suitable for the extraction of zinc and accompanying valuable components.

2 Normative references

This standard uses the regulatory references to the following standards:

GOST R ISO 5725−1-2002 Accuracy (trueness and precision) of methods and measurement results. Part 1. General provisions and definitions

GOST R ISO 5725−2-2002 Accuracy (trueness and precision) of methods and measurement results. Part 2. The basic method for the determination of repeatability and reproducibility of a standard measurement method

GOST R ISO 5725−3-2002 Accuracy (trueness and precision) of methods and measurement results. Part 3. Intermediate indicators the precision of a standard measurement method

GOST R ISO 5725−4-2002 Accuracy (trueness and precision) of methods and measurement results. Part 4. The main methods of determining the correctness of a standard measurement method

GOST R ISO 5725−5-2002 Accuracy (trueness and precision) of methods and measurement results. Part 5. Alternative methods for determining the precision of a standard measurement method

GOST R ISO 5725−6-2002 Accuracy (correctness and precision) of methods and measurement results. Part 6. The use of precision values in practice

GOST R 8.563−96 State system for ensuring the uniformity of measurements. Methods of measurement

GOST R 12.4.013−97 standards System of labor safety. Glasses protective. General specifications

GOST R 12.4.187−97 standards System of labor safety. Leather shoes for protection against common industrial dirt. General specifications

GOST R 50571.3−2009 low-voltage electrical Installations. Part of 4−41. Requirements for security. Protection against electric shock

GOST R 50610−93 Containers specialized. The types, basic parameters and dimensions

GOST R 52124−2003 zinc Concentrates. Atomic absorption method for the determination of arsenic

GOST R 52144−2003 zinc Concentrates. Spectrophotometric method for the determination of silicon dioxide

GOST R 53198−2008 Ores and concentrates of non-ferrous metals. General requirements for methods of analysis

GOST R 53228−2008 Scales non-automatic actions. Part 1. Metrological and technical requirements. Test

GOST 12.0.004−90 System of standards of occupational safety. Organization of training safety. General provisions

GOST 12.1.004−91 System safety standards. Fire safety. General requirements

GOST 12.1.005−88 standards System of labor safety. General hygiene requirements for working zone air

GOST 12.1.007−76 System of standards of occupational safety. Harmful substances. Classification and General safety requirements

GOST 12.1.016−79 System of standards of occupational safety. The air of the working area. Requirements for measurement techniques of concentrations of harmful substances

GOST 12.1.030−81 System of standards of occupational safety. Electrical safety. Protective grounding, neutral earthing

GOST 12.2.007.0−75 System safety standards. Products electrical. General safety requirements

GOST 12.3.009−76 System of standards of occupational safety. The work of loading and unloading. General safety requirements

GOST 12.3.019−80 standards System of labor safety. Test and measurement electrical. General safety requirements

12.4.009 GOST-83 System of standards of occupational safety. Fire fighting equipment for protection of objects. Principal. The accommodation and service

GOST 12.4.010−75 System safety standards. Personal protective equipment. Mittens special. Specifications

GOST 12.4.021−75 System safety standards. System ventilation. General requirements

GOST 12.4.028−76 System of standards of occupational safety. Respirators SB-1 «Petal». Specifications

GOST 12.4.099−80 women’s Overalls for protection against non-toxic dust, mechanical effects and General industrial contaminations. Specifications

GOST 12.4.100−80 men’s Overalls for protection against non-toxic dust, mechanical effects and General industrial contaminations. Specifications

GOST 12.4.103−83 System of standards of occupational safety. Special protective clothing, means of individual protection of feet and hands. Classification

GOST 17.2.3.01−86 nature Protection. Atmosphere. Rules of air quality control of settlements

GOST 17.2.3.02−78 Protection of nature. Atmosphere. Rules for establishing permissible emissions of harmful substances by industrial enterprises

GOST 83−79 Reagents. Sodium carbonate. Specifications

GOST 515−77 Paper, wrapping bituminosa and tarry. Specifications

GOST 1770−74 (ISO 1042−83, ISO 4788−80) Glassware volumetric laboratory glass. Cylinders, beakers, flasks, test tubes. General specifications

GOST 2228−81 Paper sack. Specifications

GOST 3118−77 Reagents. Hydrochloric acid. Specifications

GOST 4234−77 Reagents. The potassium chloride. Specifications

GOST 4328−77 Reagents. Sodium hydroxide. Specifications

GOST 4332−76 Reagents. Potassium carbonate — sodium carbonate. Specifications

GOST 4463−76 Reagents. The sodium fluoride. Specifications

GOST 6613−86 Grids wire woven with square cells. Specifications

GOST 6709−72 distilled Water. Specifications

GOST 7933−89 Cardboard for consumer packaging. General technical conditions.

GOST 8828−89 Paper and paper-based double-layer waterproof packaging. Specifications

GOST 9347−74 Cardboard gasket and gasket from him. Specifications.

GOST 10262−73 Zinc oxide. Specifications

GOST 10354−82 polyethylene Film. Specifications

GOST 10652−73 Reagents. Salt is the disodium Ethylenediamine — N, N, N', N' -tetraoxane acid 2-water (Trilon B). Specifications

GOST 13170−80 Ores and concentrates of non-ferrous metals. Method for determination of moisture

GOST 13610−79 carbonyl Iron radio. Specifications

GOST 14048.1−93 zinc Concentrates. Method of determining zinc

GOST 14048.2−78 zinc Concentrates. Method for determination of iron

GOST 14048.4−78 zinc Concentrates. Method of determination of silicon dioxide

GOST 14048.5−78 zinc Concentrates. Method for the determination of arsenic

GOST 14048.7−80 zinc Concentrates. Method of determination of fluorine

GOST 14180−80 Ores and concentrates of non-ferrous metals. Methods of sampling and sample preparation for chemical analysis and determination of moisture

GOST 14192−96 Marking of cargo

GOST 14919−83 electric Stoves, electric ovens and cabinets appliances. General specifications

GOST 17269−71 gadopentetate filter Respirators RU-60m and RU-60му. Specifications

GOST 19433−88 dangerous Cargo. Classification and marking

GOST 20010−93 Gloves technical. Specifications

GOST 20448−90 liquefied hydrocarbon Gases fuel for household consumption. Specifications

GOST 22235−2010 freight Wagons main Railways of 1520 mm. General requirements for ensuring safety during loading-unloading and shunting works

GOST 22261−94 Means of measurements of electrical and magnetic quantities. General specifications

GOST 22280−76 Reagents. Sodium citrate 5,5-water. Specifications

GOST 24598−81 Ores and concentrates of non-ferrous metals. Sieve and sedimentation methods for determination of granulometric composition

GOST 25336−82 Glassware and equipment laboratory glass. The types, basic parameters and dimensions

GOST 25363−87* zinc Concentrates. Atomic absorption methods for the determination of gold and silver
________________
* On the territory of the Russian Federation GOST 25363−82, here and hereafter. — Note the manufacturer’s database.

GOST 27574−87 women suit for protection against common industrial dirt and mechanical damage. Specifications

GOST 27575−87 men’s Suits for protection against General production pollutions and mechanical effects. Specifications

GOST 29057−91 men Suits for protection against non-toxic dust. Specifications

GOST 29058−91 women suit for protection against non-toxic dust. Specifications

GOST 29227−91 (ISO 835−1-81) oils. Pipettes are graduated. Part 1. General requirements

GOST 30302−95 Containers specialized. The types, basic parameters and dimensions

Note — When using this standard appropriate to test the effect of reference standards in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet or in the annual information index «National standards» published as on January 1 of the current year, and the editions of the monthly information index «National standards» for the current year. If replaced with a reference standard, which was given an undated reference, then it is recommended to use the current version of this standard, taking into account all enabled in this version modifications. If replaced with a reference standard, which is given a dated reference, it is recommended to use the version of this standard referred to above by year of approval (acceptance). If after approval of this standard in the reference standard, which is given a dated reference, a change affecting a provision to which reference, the provision is recommended to be applied without taking into account this change. If the reference standard is cancelled without replacement, the position in which reference is made to him, recommended to be used in part not affecting this link.

3 Terms and conventions

This standard applies the terminology and symbols according to GOST R ISO 5725−1-2002 and GOST R ISO 5725−6-2002, and GOST R 53198−2008.

4 Technical requirements

4.1 Basic provisions

4.1.1 Chemical composition of zinc concentrates in terms of dry weight are shown in table 1.


Table 1 Standardized chemical composition of zinc concentrates

Percentage

4.1.2 Mass fraction of moisture in zinc concentrates of any granulometric composition should be no more than 9%.

It is possible to supply zinc concentrates with a mass fraction of moisture over 9 per cent, if stipulated in the contract or the contract for the supply of products. The mass fraction of moisture depends on the mass fraction of fraction minus 0,071 mm in accordance with table 2, and the supply of bulk concentrate with a mass fraction of moisture more than 12% is permitted by agreement with the carrier.


Table 2 — Acceptable values of the mass fraction of moisture in zinc concentrates, depending on the mass fraction of fraction minus 0,071 mm

Percentage

4.1.3 In zinc concentrates is not allowed the presence of foreign objects (pieces of rock, wood, metal, etc.), as well as pieces of sintered concentrate.

Note — By agreement between manufacturer and consumer can be established additional requirements to appearance of zinc concentrates.

4.2 Transport labeling

4.2.1 Transport marking zinc concentrates shipped in containers must be labelled on each container and comply with GOST 14192 and the contractual terms for the supply of products to the consumer.

When the supply of zinc concentrates water transport the marking of the goods must also conform to the provisions of [6].

4.2.2 Transport marking should be reliable, durable and must be applied to each package (container or label) in the vehicle with an indication of manipulation sign «Top, do not turn over» according to GOST 14192 and contain the following information:

transport cargo description («zinc Concentrates»);

— the name of the consignee and destination;

— the name of the manufacturer or the shipper (his trademark) and the point of departure;

weight gross and net load.

4.3 Packaging

4.3.1 Zinc concentrates are Packed in specialized containers of the type SK-2−3 or SK-2−5 30302 according to GOST and GOST R 50610, in soft containers of single-use type on MD [23]*-[26]* or similar containers of other types with the same or higher technical specifications, ensuring product safety during transportation by rail and transported without packaging in bulk in gondola cars road transport and (or) marine transport in accordance with goods transportation regulations for particular kind of transport.
________________
* See Bibliography. — Note the manufacturer’s database.

Note — the Containers shall meet the requirements of the documentation on them, to be certified by the competent authority of the Russian Federation, and soft containers of single-use — to-have factor of safety not less than 6:1.

5 safety Requirements

5.1 Zinc concentrates are chemically neutral, non-radioactive, stable and pozharo-explosion-proof substances do not dissolve in water or form with water of toxic compounds, does not cause corrosion of metals, do not have harmful effects on living organisms when released into water and soil, do not require protection from atmospheric precipitations, as influenced by atmospheric and external influences cannot be damaged and destroyed, and do not cause damage to vehicles, disruption of track circuits and cannot be a source of accidents.

The interaction of acids with zinc concentrate produces toxic sulfur compounds, including hydrogen sulfide (with hydrochloric acid) and sulphur dioxide (sulphuric and nitric acids).

5.2 Zinc concentrates are mixtures of natural minerals (sphalerite, pyrite, arsenopyrite, chalcopyrite, Galena, quartz, vitreous, etc.), which contains the bound state in the form of sulfides, sulfates and other inorganic compounds of zinc, arsenic, iron, lead, indium, cadmium, potassium, sodium, silicon, copper, sulfur, gold, silver, and fluorine, which, according to GOST 12.1.005, [1]*-[5], [7]-[9] and [34] are substances, the content of which is controlled in the manufacturing process, transportation, storage and application of zinc concentrates.
________________
* See Bibliography, here and hereafter. — Note the manufacturer’s database.

5.3 zinc Dust concentrates, entering the body in contact with her people through the respiratory system and the gastrointestinal tract, may cause atrophic and subatrophic catarrh of the upper respiratory tract, gastrointestinal disorders and pneumoconiosis, as well as irritability, insomnia, tinnitus, memory loss and hearing loss.

5.4 Zinc concentrates, the content of zinc sulfide, a key component of the concentrates according to GOST 12.1.005 belong to moderately hazardous substances according to GOST 12.1.007 (hazard class 3).

5.5 Production facilities for the manufacture of zinc concentrates (including premises for carrying out of chemical analyses of composition of concentrates) and their applications (areas, which can be loaded zinc concentrate in a furnace for annealing) must be equipped with General dilution ventilation system with mechanical drive according to GOST 12.4.021 and the emission of harmful substances from the zinc concentrates in the air of the working area should be equipped with local exhausts from the processing equipment.

5.6 in the production of zinc concentrates, the requirements of health regulations [18] and [20]* the rules of fire safety according to GOST 12.1.004, rules of electric safety according to GOST 12.2.007.0, GOST 12.3.019, GOST R 50571.3 and [10], [40] and [41].
________________
* See Bibliography, here and hereafter. — Note the manufacturer’s database.

5.7 When applying zinc concentrates (roasting concentrates), the requirements of sanitary regulations [17]-[20] and the rules of fire safety according to GOST 12.1.004.

5.8 When carrying out loading and unloading zinc concentrates are required to comply with the safety requirements according to GOST 12.3.009.

5.9 in the production of zinc concentrates and their roasting in air medium production facilities may release harmful substances, presented in table 3.


Table 3 — Hygienic standards established for the harmful chemicals included in the zinc concentrates, as well as substances formed in the process of firing in the air of working zone

________________
* See Bibliography. — Note the manufacturer’s database.

5.10 the Mass concentration of harmful chemical substances in the composition of the zinc concentrates, as well as substances formed in the process of firing in the air of working zone according to [1] must not exceed values of maximum permissible concentration (MPC) given in table 3 along with other health standards for these substances.

5.11 equipment and electrical installations used during the conduct of work related to the manufacture and use of zinc concentrates must be equipped with devices for grounding corresponding to requirements of GOST 12.2.007.0, GOST 12.1.030, and [41].

5.12 the management body shall ensure the implementation of production control over observance of requirements of sanitary rules at production and application of zinc concentrates and analytical control of concentration of harmful substances in the air of working zone according to the rules [17]. The frequency of the analytical control depends on the hazard class of the substance according to GOST 12.1.007 and is regulated by GOST 12.1.005.

5.13 Programmes (plans) of production (analytical) monitoring compliance with sanitary rules shall be developed by the company and approved according to established procedure.

5.14 Methods of measurements of concentrations of harmful substances in the air of working zone shall meet the requirements of GOST R and GOST 8.563 12.1.016, as well as to provide the required accuracy and reliability of measurement results.

5.15 Employees at the production sites related to the manufacture and use of zinc concentrates, must be at least eighteen years of age, undergo a medical examination in accordance with the procedure and terms of carrying out obligatory preliminary (at receipt for work) and periodic medical examinations (surveys) according to [30]* [31]*, and must complete an initial (at receipt for work) and periodic instructing in labor protection in accordance with the requirements of GOST 12.0.004 and existing at the enterprise security rules.
________________
* See Bibliography. — Note the manufacturer’s database.

5.16 Work related to the manufacture and use of zinc concentrates, should be performed in individual means of respiratory protection by GOST 12.4.028 (respirator SB-1 «Petal») or according to GOST 17269 (gadopentetate filter type respirators RU-60m or RU-60му), dry and serviceable clothing for 12.4.099 GOST, GOST 12.4.100, GOST 12.4.103, GOST 27574, 27575 GOST, GOST and GOST 29057 29058, footwear by GOST R 12.4.187, hand protection according to GOST 12.4.010 or GOST 20010, eye protection according to GOST R 12.4.013 (glasses with side protection frame with light filters) or other means of individual protection, providing effective protection to workers from harmful substances contained in the screenings.

5.17 the Results of the individual means of protection according to 5.16 must be performed in accordance with [42]*.
________________
* See Bibliography. — Note the manufacturer’s database.

5.18 work related to the manufacture and use of zinc concentrates, it is necessary to use individual protection equipment according to enterprise instructions on the procedure of issuing, storage and use of special clothing, special footwear and other protective equipment. Personal protective equipment should be stored in designated cabinets. Removal of PPE, and stay off-premises are prohibited.

5.19 employees involved in the preparation and application of the zinc concentrates, in the preventive purposes should be provided with milk or other equivalent food products according to [29] and [32].

5.20 Production premises should be equipped fire extinguishing equipment (water, quartz sand, nonconducting fabric, foam, carbon dioxide fire extinguishers). The types of fire equipment designed to protect against fires in industrial premises must comply with the provisions of GOST 12.4.009.

5.21 employees involved in the manufacture or use of zinc concentrates, should be provided with premises according to [15].

5.22 In the premises, which work is being carried out with zinc concentrates, do not store food and water, eating, drinking and Smoking.

5.23 On completion of works associated with zinc concentrates, it is necessary to conduct cleaning job, to clean special clothing, other protective equipment and tools, wash hands and face with soap and water, and at the end of shift to take a shower.

6 Requirements of environmental protection

6.1 in the manufacture and application of zinc concentrates production and wastewater are not formed.

6.2 Major types of impact of zinc concentrates on the environment may be contamination of air, soil and water in discharges, emissions, violations of rules of storage or transportation, emergency situations, informal accommodation, incineration or burial of waste, which leads to a change in the sanitary regime of the ambient air, water bodies and soil degradation.

6.3 Monitoring of content of harmful substances in the composition of the zinc concentrates, in case of contact with concentrate in the air, water or soil conduct environmental authorities at the request of interested enterprises.

6.4 in the manufacture of zinc concentrates and their application, as well as loss of zinc concentrates during transportation, storage, loading or unloading of possible discharge into the atmosphere of aerosols pollutants regulated [3] and [4]*, the maximum concentrations in the surface layer ranging from the border of sanitary-protective zone and further subject to dispersion must not exceed MPC or shoes, given in table 4.
________________
* See Bibliography. — Note the manufacturer’s database.


Table 4 — Hygienic standards established for the contaminants included in the zinc concentrates, for atmospheric air of populated areas

6.5 for the purposes of atmospheric air protection from pollution must be ensured by fulfilling the requirements of GOST 17.2.3.01, GOST 17.2.3.02 and [13].

6.6 Zinc concentrates are dangerous goods of class 9, subclass 9.2, 924 classification code according to GOST 19433 only when transported in bulk water transport in closed holds, as the interaction of oxygen with zinc concentrate possible oxidation included in it zinc sulfide with the formation of semistochastic compounds, leading to a decrease of the volume fraction of oxygen below 21%.

6.7 in the storage and transportation of zinc concentrates do not pose a risk to the environment and human health in meeting the requirements of 6.1−6.6 and 6.8−6.11.

6.8 When storing and transporting zinc concentrates are required to comply with the requirements for purity and mode waters [35]*.
________________
* See Bibliography. — Note the manufacturer’s database.

6.9 Maximum concentration of harmful chemical substances in the composition of the zinc concentrates, in case of zinc concentrate in the reservoir should not exceed the MPC according to [2], are given in table 5.


Table 5 — Hygienic standards established for the harmful chemicals included in the zinc concentrates, the water of water objects of drinking and cultural-domestic water use

6.10 Maximum concentration of harmful chemical substances in the composition of the zinc concentrates, in water of water bodies having fishery significance, according to [34] in case of zinc concentrate in the reservoir should not exceed the MPC values given in table 6.


Table 6 — Hygienic standards established for the harmful chemicals included in the zinc concentrates, the water of water bodies having fishery significance

6.11 Maximum concentrations of harmful chemical substances in the composition of the zinc concentrates according to [9], in case of zinc concentrate in the soil should not exceed the MPC values listed along with the hazard class of these substances in table 7.


Table 7 — Hygienic indicators of harmful chemical substances in the composition of the zinc concentrates to the soil

6.12 Zinc concentrates disposal is not subject.

6.13 Shlakobetonnye waste (silicate of zinc, etc.) generated during the processing of zinc concentrates in the enterprise, the consumer, can be used at the discretion of the company, including processing and sending in special industrial «slag deposits» in compliance with [14].

7 acceptance Rules

7.1 Zinc concentrates take parties. Each batch of zinc concentrate should consist of a homogeneous product of the same brand and be accompanied by one document on quality, which is sent to the enterprise consumer, together with settlement documents.

The document about quality should contain:

— name of enterprise-manufacturer and its trademark;

— name of the product;

— the batch number;

— weight (net) of the party;

— test results for compliance with 4.1.1. and 4.1.2.;

— the date of shipment.

Weight (net) supply of the products zinc concentrate is set by agreement between manufacturer and user.

7.2 Validation of the transport labelling and packaging of zinc concentrate for compliance with the requirements of 4.2 and 4.3 is carried out visually.

7.3 Each batch of zinc concentrate is subjected to acceptance tests for compliance with the requirements specified in 4.1.1, 4.1.2, ongoing technical control of the manufacturer.

7.4 Batch of products received, if the test results for all indicators meet the requirements of this standard.

7.5 Upon receipt of unsatisfactory results of the acceptance testing at least one indicator specified in 4.1.1 and 4.1.2, repeat tests are carried out on twice the amount of product taken from the same batch. The results of repeated tests apply to the entire party.

8 Methods of control

8.1 General requirements for methods of measurements.

8.1.1 Sampling for chemical analysis and their preparation is carried out in accordance with GOST 14180.

By agreement between the manufacturer and the customer is allowed to apply other sampling methods to ensure the required precision of selection.

8.1.2 the titer of the standard solution of Trilon B set on five parallel definitions. Mass fraction of gold and silver placed on the results of three parallel measurements. The mass fraction of the remaining analyzed elements set according to the results of two parallel determinations.

8.1.3 accuracy Control of measurement results carried out according to GOST R 53198 (section 13).

8.2 Mass concentration of elements in zinc concentrates of all grades is determined by the analysis methods given in section 8, 53198 GOST R, GOST 14048.4, 14048.5 GOST, GOST and GOST 14048.7 25363, [44], and also by others certified in the prescribed manner to the methods of analysis, subject to the receipt by him of the metrological characteristics of the measurement results according to the GOST R 53198 (section 13).
________________
* See Bibliography, here and hereafter. — Note the manufacturer’s database.

8.3 Mass fraction of moisture determined by the gravimetric method according to GOST 13170 with the following additions:

— admissibility of the results of determining the mass fraction of moisture is estimated according to GOST R 53198 (section 13);

— the metrological characteristics of the results of determining the mass fraction of moisture should not exceed the values given in table 8;

— control the accuracy of results of determining the mass fraction of moisture, including the assessment of their accuracy is carried out according to GOST R 53198 (section 13);

— if the value of the mass fraction of moisture in the concentrate exceeding 9%, determine the mass fraction minus the fraction of 0.071 mm sieve by the method according to GOST 24598 using a sieve 0,071 according to GOST 6613, for compliance with the requirements given in table 2.


Table 8 — the Metrological characteristics of the results of determining the mass fraction of moisture at a confidence probability of 0.95

Percentage

8.4 Mass fraction of zinc determined titrimetric method GOST 14048.1 with the following additions:

— to determine titer of the solution Trilon B for zinc prepared five batches of zinc with a mass 0,1500 g each;

for titer take the arithmetic average of results of five definitions. The calculated value is rounded to the fifth significant figure after the decimal point;

— accuracy of setting of the titer of the solution , g/cm, is calculated by the formula

, (1)

where  — the error of the titer of the solution Trilon B for zinc.

 — standard deviation of repeatability of the titration, g/cm;

 — the student coefficient at the confidence probability of 0,95;

3,86;

 — the number of definitions, 5.

Error establishing titer is negligible compared to the error analysis in case of fulfillment of conditions

, (2)

where  — the error of the titer of the solution Trilon B for zinc, calculated according to the formula (1), g/cm;

the titer of the solution Trilon B for zinc, defined by GOST 14048.1, g/cm;

the average value of the mass fraction of zinc in zinc concentrate in the designated range;

 — the limit of absolute error of the results of the analysis for the relevant range of mass fraction of zinc, taken from table 9, %;

— admissibility of the results of determining the mass fraction of zinc is estimated according to GOST R 53198 (section 13);

— the metrological characteristics of the results of determination of mass fraction of zinc should not exceed the values given in table 9;

— control the accuracy of results of determining the mass fraction of zinc, including an assessment of their accuracy, is carried out according to GOST R 53198 (section 13).


Table 9 — Metrological characteristics of the results of determining the mass fraction of zinc at a confidence probability of 0.95

Percentage

8.5 the Mass fraction of copper, lead, arsenic, cadmium, iron was determined by atomic emission spectroscopy with inductively coupled plasma [44].

8.6 the Mass fraction of copper, lead, arsenic, cadmium, iron, indium, sodium, potassium, gold, silver determined by atomic absorption spectrophotometry according to [44] and GOST R and GOST 52124 25363.

8.7 Mass fraction of iron determined titrimetric method GOST 14048.2 with the following additions:

— admissibility of the results of determining the mass fraction of iron evaluated according to GOST R 53198 (section 13);

— the metrological characteristics of the results of determination of mass fraction of iron should not exceed the values given in table 10;

— control the accuracy of the results of determination of mass fraction of iron, including the assessment of their accuracy, is carried out according to GOST R 53198 (section 13).


Table 10 — the Metrological characteristics of the results of determination of mass fraction of iron at a confidence probability of 0.95

Percentage

8.8 determination of the mass fraction of fluoride potentiometric method

The method involves measuring the equilibrium potential of the ion-selective electrode related to the concentration of fluoride ions in the solution of the logarithmic dependence. The measurement is performed using a potentiometric device of the ionomer. Deformity of fluorine ions separated by their coprecipitation on iron hydroxide (II).

8.8.1 measurement Means, auxiliary devices, materials, reagents and solutions

Ion meter with automatic calibration and measurement error potential of no more than ±0,2 mV;

Electrode fluoride ion-selective of any type that is compatible with the ionomer;

Silver chloride electrode dual auxiliary electrolytic key, ESR-10101 according to GOST 22261 or similar;

Scales non-automatic actions according to GOST R 53228;

Graduated pipettes 1, 2, 5, 10, 20 and 25 cmaccording to GOST 29227;

Beakers measuring according to GOST 1770;

Cylinders with a capacity of 10 cmaccording to GOST 1770;

Volumetric flasks with a capacity of 50, 100, 200, 1000 cmaccording to GOST 1770;

Electric muffle furnace with a heating temperature up to 1000 °C;

The unit with a closed spiral of GOST 14919;

Laboratory drying oven of any type;

The fume hood of any type;

The magnetic stirrer of any type;

The glassy carbon crucibles with a capacity of 100 cm;

Crucible tongs;

Plastic cans with screw-caps, with a capacity of 50, 100 and 250 cm;

Glasses of TCS with a capacity of 50, 100, 250 cmaccording to GOST 25336;

Funnel glass;

Watch-glasses;

Hydrochloric acid according to GOST 3118, a solution of hydrochloric acid (1:1) and 1 n;

Sodium hydroxide according to GOST 4328;

Potassium chloride according to GOST 4234, potassium chloride solution 3.5 n;

Sodium carbonate according to GOST 83−79, a solution of sodium carbonate 20%;

Potassium carbonate — sodium carbonate according to GOST 4332;

Sodium citrate according to GOST 22280;

Sodium fluoride according to GOST 4463;

The reagent is dried at a temperature of 100−105 °C for two hours. Store in a tightly sealed plastic jar;

Trilon B according to GOST 10652;

Zinc oxide according to GOST 10262;

Iron oxide (III);

Copper oxide;

Lead oxide;

Radio engineering carbonyl iron according to GOST 13610;

Distilled water according to GOST 6709;

Paper universal indicator;

The filter paper with blue ribbon;

Filter paper;

The mixture of oxides simulating the approximate composition of zinc concentrate after firing, prepared as follows: weighed on technical scales of 12.4 g of zinc oxide, 5.7 g of iron oxide, 0.4 g of lead oxide and 0.2 g of copper oxide. All components mix thoroughly and store in a tightly sealed plastic jar;

The fusion mixture is prepared as follows: weighed on technical scales 2.0 g of potassium carbonate, sodium carbonate and 3.5 g of sodium hydroxide and mix thoroughly. The mixture is prepared immediately prior to fusion;

A solution of iron (II) chloride containing 25 mg of iron per 1 cmof a solution prepared as follows: 2.5 g of powder of carbonyl iron is placed in a volumetric flask with a capacity of 100 cm, flow 10 cmof distilled water and 40 cmof concentrated hydrochloric acid. At the end of the reaction the solution is heated on a water bath until complete dissolution of iron. Cool, adjusted to the mark with distilled water, close stoppered glass tube and mixed. The solution was stored in a dark place not more than three months;

Standard solutions of fluoride is prepared as follows:

Solution And mass concentration 0.5 mol/DM: a portion of the sodium fluoride mass 4,2000 g dissolved in 150 cmof hot distilled water. The solution was cooled, transferred to a volumetric flask with a capacity of 200 cm, adjusted to the mark with distilled water and mix;

Solution B is the mass concentration of fluoride 1·10mol/DM(1 pF): 10 cmsolution And transferred to a volumetric flask with a capacity of 50 cm, adjusted to the mark with distilled water and mix;

Solution of the mass concentration of fluoride 1·10mol/DM(2pF): 5 cmof a solution transferred to a volumetric flask with a capacity of 50 cm, adjusted to the mark with distilled water and mix;

Likewise, the method of successive dilutions, prepare the remaining standard solutions with mass concentrations of fluoride 1·10, 1·10and 1·10mol/DM(solutions D, e and f);

All solutions containing fluoride is poured into a dry plastic jars and store tightly sealed in a dark place;

Solutions A and B are stable for one year, the solutions V and G to six months, solutions D and E are recommended to be prepared immediately prior to measurement;

The filling solution of the electrode mass concentration of potassium chloride 3.5 mol/DMis prepared as follows: 26,1 potassium chloride dissolved in 100 cmof distilled water by heating, cool. Store in a closed flask with a plastic stopper. The retention period is not limited;

Background solution for adjusting ionic strength of the analyzed solution and the effects of interfering ions for the determination is prepared as follows: 300,1 g of sodium citrate and 3.1 g Trilon B dissolved in distilled water under heating, cooled, transferred into a measuring flask with volume capacity of 1000 cm, adjusted to the mark with distilled water and mix. The solution is stable for one year.

8.8.2. Analysis

A sample of zinc concentrate with a mass of 1,000 g was placed in a glassy carbon crucible and calcined for 1 h at 500 °C, cooled and thoroughly mixed with the mixture for alloying. The crucible was placed in muffle furnace with a temperature of 350 °C, heat the sample for 15 min, then transferred into the crucible muffle furnace, heated to a temperature of 650−670 °C and fused for 10 min, the melt was stirred once. At the same time take equal to the mass of the weighed mixture of the oxides and is carried out through the entire course of the analysis (controlling experience). The resulting analysis of the control solution used in the construction of calibration curve to account for the influence of composition of sample and reagents used in the analysis.

After cooling, the crucible is poured into a 50 cmhot distilled water, close the crucible watch glass and leached the beach at weak boiling. The resulting solution and the precipitate was transferred to a beaker with a capacity of 250 cm. The crucible is washed with hot distilled water so that total volume of the solution with the sediment did not exceed 100 cm. To the solution to precipitate poured 10 cmof hydrochloric acid (1:1) and 3 cmof a solution of iron (II) chloride, heated to a temperature of 80−90°C and check the pH of the solution on the indicator paper. If necessary, add dropwise a solution of hydrochloric acid (1:1) or 20% solution of sodium carbonate to obtain a solution with a pH of 8−9. Close a glass watch glass and heat the solution to precipitate for 30 min, avoiding boiling. Then re-check the pH value of the solution and if necessary adjust it as described above and heated for another 10 min.

After cooling the solution to precipitate transferred to a volumetric flask with a capacity of 200 cm, adjusted to the mark with distilled water and mix. Filter the solution through a filter with a blue ribbon with a small number of filtrowanie mass in a dry plastic jar. The first portion of the filtrate discarded. The remaining filtrate was used for measurements.

The preparation of the ionomer and the electrode to the work carried out in accordance with the manual of ionomer and passports to the electrodes. Fluoride electrode before measurements is kept in solution 5pF for 30 min, and then washed it in distilled water for 10 min, then proceed with the calibration of the electrode according to the operating instructions of the device.

For the calibration of the electrode graduirovannam prepare a series of solutions as follows: four volumetric flasks with a capacity of 50 cmeach placed sequentially at 5 cmstandard solutions B, C, D and e are in each flask poured aliquot part of the control solution, equal aliquote part of the analyzed solution (20 cm), and stirred.

Bring the solution volume up to 30 cm, check the pH on indicator paper and, if necessary, poured dropwise 1 n solution of hydrochloric acid to a pH of 5−7, stirred, poured 5cmof the background solution was adjusted to the mark with distilled water and mix.

The solution is placed in a dry beaker immersed in it, the electrodes and the magnet. The solution was stirred for 2 minutes, turn off the stirrer and after the establishment of the electrode potential enter the value in the memory device according to the instructions.

Similarly prepared to the measurements the solution, with the exception of the introduction aliquote part of the control solution.

Measure the electrode potential and read from the screen of the device, the mass concentration of fluoride in solution.

The electrode between measurements analyzed solutions are washed in distilled water for 2 min and kept on the air.

8.8.3 Processing of measurement results

Mass fraction of fluorine in concentrate , %, is calculated by the formula

, (3)

where is the mass concentration of the measured solution, determined from calibration schedule, mg/DM;

 — weight of sample, g;

 — the volume of the analyzed solution, cm;

 — volume aliquote part of the analyzed solution, cm;

 — the volume of solution volumetric flasks, 50 cm.

The acceptability of the obtained results of determining the mass fraction of fluoride is estimated according to GOST R 53198 (section 13).

Metrological characteristics of the results of determining the mass fraction of fluorine should not exceed the values given in table 11.


Table 11 — Metrological characteristics of the results of determining the mass fraction of fluorine at a confidence probability of 0.95

Percentage

Accuracy control in the determination of the mass fraction of fluoride, including the assessment of their accuracy, is carried out according to GOST R 53198 (section 13).

8.9 Mass fraction of silicon dioxide is determined spectrophotometrically according to GOST R 52144 with the following additions:

— admissibility of the results of determining the mass fraction of silicon dioxide is evaluated by GOST R 53198 (section 13);

— the metrological characteristics of the results of determining the mass fraction of silicon dioxide should not exceed the values specified in table 12;

— control the accuracy of results of determining the mass fraction of silicon dioxide, including assessment of their accuracy, is carried out according to GOST R 53198 (section 13).


Table 12 — Metrological characteristics of the results of determining the mass fraction of silicon dioxide at a confidence probability of 0.95

Percentage

8.10 Verification of zinc concentrate in appearance and on the absence of foreign matter in compliance with the requirement of 4.1.3 is carried out visually.

9 Transportation and storage

9.1 Zinc concentrates are transported by rail, water and road modes of transport in accordance with cargo carriage regulations and the technical conditions of their placement and fastening in force on these types of transport [36]-[39] and [43].

9.2 Transportation of zinc concentrates by railway in open rolling stock is Packed in 4.3.1 according to [36].

When transporting zinc concentrates in bulk in all-metal gondola cars with hatches, the shipper shall comply with [37], [38] and [43].

To prevent spillage on a railway line zinc concentrates transported in bulk, and contamination of the environment, the shipper shall comply with [36] and [38].

The measures taken by the shipper to provide for sealing structural gaps wagons by covering the floor and parts of the walls of the carriages to a height of not less than 150 mm from the floor material, which ensures a reliable seal of the gap (paper 515 GOST, GOST 2228 or GOST 8828, cardboard according to GOST 7933, GOST 9347, [22]*, [27]* or [28]* and the polyethylene film according to GOST 10354).
________________
* See Bibliography. — Note the manufacturer’s database.

When loading zinc concentrates in the car and unloading them from the car must comply with the requirements of GOST 22235.

To prevent blowing of fine particles of zinc concentrates transported in bulk, the motion of the vehicle the consignor shall follow the requirements [36].

Taken by the shipper, additional measures to prevent the blowing of fine particles of zinc concentrates as follows:

— loading is performed in such a way that the distance from the surface of the zinc concentrates to the upper parts of the walls of the train was at least 0.8 m;

— after loading the surface of the zinc concentrates shall be leveled and compacted.

To prevent freezing of the zinc concentrates in the cold period of the year should be carried out preventive measures under section III [39].

9.3 Transport of zinc concentrates water transport is subject to the provisions of [6], [11]*, [12] [16] under the following conditions:
________________
* See Bibliography. — Note the manufacturer’s database.

zinc concentrates are transported in packaged form or in bulk in the holds of ships with mandatory examination at the national organization for the safety of Maritime transport of goods, whether the sender (producer) of the Declaration on the transport characteristics and the conditions for Maritime transport of bulk (bulk) cargo;

— in the hold of a ship zinc concentrates are placed separately from the goods, afraid of pollution;

— loading zinc concentrates in the hold of the vessel is suspended in atmospheric precipitation;

— the entrance of people into the hold of the vessel with the zinc concentrates is allowed only in emergency situations in a self-contained breathing apparatus. In the upper part of the cargo spaces shall be capable of sampling the gas-air environment without a visit to this room. Cargo room should be equipped with devices allowing for natural or forced ventilation.

9.4 Transport of zinc concentrates by road transport is in packaged form and in bulk.

Transportation of zinc concentrates in bulk is subject to the following conditions:

— to prevent spillage of zinc concentrate via the existing in the back of constructive gaps on roadway and environmental pollution these gaps is necessary before loading zinc concentrates in the vehicle is filled with paper, cardboard or plastic film according to [38];

— to prevent freezing of the zinc concentrates to the bottom and to the walls of the vehicle in the cold season they need before the loading of the concentrate to cover paper or cardboard [38] and [39];

— to prevent loss of zinc concentrates when driving the vehicle they should cover it with a thick durable fabric or film.

9.5 In case of export of zinc concentrates from the Russian Federation the mode of transportation and requirements conditions of carriage defined in the contract for the supply of zinc concentrates and regulations in force in the territories of the consignor and the consignee.

9.6 Zinc concentrates are stored separately according to the types and parties (Packed or bulk) in warehouses or on designated sites, adapted for carrying out loading and unloading operations.

10 Guidance manual for

10.1 Zinc concentrates are subject to metallurgical processing in a dedicated facility, which receive a metallic zinc and zinc-containing slags, the latter may be subject to re metallurgical processing in order to extract from them, zinc, lead and other components.

11 manufacturer’s Warranty

11.1 the Manufacturer guarantees the zinc concentrates THAT the requirements under the conditions of its transportation and storage.

11.2 Warranty period of storage of zinc concentrates is not limited.

Bibliography

__________________________________________________________________________
UDC 622.344.6−15:546.681.06:006.354 OKS 77.120.30 OKP 172111

Key words: concentrate zinc, mass fraction, safety requirements, environmental protection, acceptance rules, methods of control