GOST 17614-80

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  ГОСТ 17614-80

GOST 17614−80 Tellurium technical. Specifications (with Amendments No. 1, 2)

GOST 17614−80

Group W51

INTERSTATE STANDARD

TELLURIUM TECHNICAL

Specifications

Tellurium technical. Technical requirements.

GST 17 6992

Date of introduction 1983−01−01

INFORMATION DATA

1. DEVELOPED by the Ministry of nonferrous metallurgy of the USSR

2. INTRODUCED by the Ministry of nonferrous metallurgy of the USSR

3. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 19.03.80 N 2190

4. REPLACE GOST 17614−72

5. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

6. Limitation of actions taken by Protocol No. 2−92 of the Interstate Council for standardization, Metrology and certification (ICS 2−93)

7. EDITION with Amendments No. 1, 2 approved in June 1987, February 1993 (IUS 9−87, 9−93)

This standard applies to technical tellurium in powder and ingots, designed for obtaining tellurium in high purity, the manufacture of paints and other purposes, as well as for tellurium, intended for export.

1. MARKS AND TECHNICAL REQUIREMENTS

1.1. Technical tellurium must be manufactured in accordance with the requirements of this standard technical documentation, duly approved.

Brand and chemical composition of tellurium must meet the requirements specified in table.1.

Table 1

Note. Mass fraction of silicon and aluminum is provided in production technology and is determined periodically. The frequency definition established by agreement between manufacturer and consumer.
________________
* OKP code for tellurium powder.

1.2. Technical tellurium are made in the form of powder and ingots.

(Changed edition, Rev. N 1).

1.3. Powdery tellurium — powder is dark gray or black.

Requirements the bulk density of powdered tellurium is determined by agreement between manufacturer and consumer.

(Changed edition, Rev. N 2).

1.4. The shape and dimensions of the ingot shall correspond to hell.1 and table.2, the mass of the ingot (7±1) kg.

Damn.1

Table 2

mm

1.5. Powdery tellurium all brands have to pass through a sieve with a mesh 1K according to GOST 6613. The tellurium should not be foreign bodies and lumps. Allowed the use of normal meshes in accuracy according to GOST 6613.

At the request of the consumer tellurium, intended for the manufacture of paints, must pass through a sieve with a mesh 063К according to GOST 6613.

1.4, 1.5. (Changed edition, Rev. N 1).

2. SAFETY REQUIREMENTS

2.1. Technical tellurium belongs to the extremely dangerous substances according to GOST 12.1.005 and GOST 12.1.007 while in aggregate state liquid. Hazard — food poisoning.

Technical tellurium, getting into the human body through the respiratory tract or the skin, causing chronic inflammation of the joints, bone disease, chronic bronchitis, nervous disorders, liver disease, changes in the enamel of the teeth.

(Changed edition, Rev. N 1, 2).

2.2. Tellurium belongs to the substances of 1st hazard class according to GOST 12.1.005 and GOST 12.1.007. Hazard — inhalation of tellurium aerosols.

(Changed edition, Rev. N 1).

2.3. Maximum permissible concentration (MPC) of tellurium in workplace air is 0.01 mg/maccording to GOST 12.1.005.

Analysis of air environment of industrial premises for the maintenance of the tellurium must be conducted in accordance with the normative-technical documentation and schedule approved in the prescribed manner.

2.4. Production facilities and laboratories, which carried out the work with tellurium, must be equipped with ventilation system, providing content of tellurium in workplace air in accordance with the requirements of GOST 12.1.005.

2.5. Storage areas should be equipped with exhaust ventilation in accordance with GOST 12.4.021.

(Changed edition, Rev. N 1).

2.6. (Deleted, Rev. N 1).

2.7. All working with tellurium should be provided with sanitary facilities and protective clothing in accordance with the rules approved in the established procedure in accordance with normative-technical documentation.

2.8. For respiratory protection must be used respirator type «Petal» according to GOST 12.4.028 or cotton-gauze bandage.

2.7, 2.8. (Changed edition, Rev. N 1).

2.9. Recycling, neutralization and disposal of waste from the production of tellurium is carried out in accordance with normative-technical documentation.

3. ACCEPTANCE RULES

3.1. Technical tellurium is accepted by the parties. The party should consist of tellurium of one brand, one type and one decorated by a quality document certifying the conformity of the product with the requirements of this standard including:

trademark or name of manufacturer and its trademark;

the name of the product and its brand;

batch number;

the results of the tests;

the weight of the party;

number of seats in the party;

the date of issue;

the designation of this standard.

(Changed edition, Rev. N 1, 2).

3.2. To control the chemical composition, bulk density and particle size of powdered tellurium select at least 1 kg batch.

Bulk density of powdered tellurium is controlled by agreement between manufacturer and consumer.

3.3. To control the mass and chemical composition of tellurium ingot is taken 10% of the bars from the party.

(Changed edition, Rev. N 1).

3.4. To control the chemical composition of the factory allowed the sampling of liquid tellurium during the flood.

3.5. In tellurium stamps t0 mass fraction of silver and tin is determined in each batch.

3.6. If unsatisfactory results of the analysis of at least one of the indicators of the test carried out on twice the number of samples taken from the same sample. The results of the analysis apply to the entire party.

3.5, 3.6. (Changed edition, Rev. N 1).

4. TEST METHODS

4.1. From each packing unit of powdered tellurium in a mechanical probe or a probe with a diameter of 20−25 mm sampled in three locations by submerging the probe or the probe the entire depth of the packing unit. Spot samples are combined, thoroughly mixed, reduce to a mass of 1 kg and sifted through a sieve with a mesh 1K according to GOST 6613. The sieved sample was stirred, reduced to 100 g, crushed, sieved through a sieve with a mesh 014К according to GOST 6613, and is divided into two parts. One part of the sample intended for the determination of chemical composition, the other is stored in a closed container for 3 months in case of disagreement in quality assessment.

4.2. Each ingot selected drill drilling with a diameter of 10−15 mm on top of 2/5 the depth of the ingot at three points located on the diagonal of the rectangular surface of the ingot in the center and at a distance of ¼ the length of the diagonal from the corners; the bottom 3/5 of the depth of the ingot in two points situated on the same diagonal at a distance of 1/3 the length of the diagonal from the corners. The wood chips are crushed, sieved through a sieve with a mesh 0355К according to GOST 6613, mix thoroughly and reduce to masses of 100 g of the Condensed sample is ground, sieved through a sieve with a mesh 014К according to GOST 6613, stirred, treated with a magnet and is divided into two parts. One part of the sample intended for the determination of chemical composition, the other is stored in a closed container for 3 months in case of disagreement in quality assessment.

4.3. Chemical composition of tellurium is determined according to GOST 9816.0 — GOST 9816.5.

Allowed other methods of analysis that are not inferior in accuracy to the standard. The differences in the evaluation of the chemical composition of the impurities in the technical tellurium used methods for 9816.0 GOST — GOST 9816.5.

4.2, 4.3. (Changed edition, Rev. N 1).

4.4. To determine the particle size of powdered tellurium take 0.5 kg from the combined sample and sieved through a sieve with a mesh according to GOST 6613.

4.5. To determine the bulk density of powdered tellurium from the integrated samples are taken by sample weighting 200−250 g. the Bulk density is determined by volutomitra Scott (damn.2).

1 — funnel of tin-plate with 0.25 mm thick; 2 — bunker with plates of organic glass

Damn.2

4.5.1. A clean dry glass with smooth edges height of 40 mm and a diameter of 25 mm should be filled to the brim with water from a burette at ambient temperature (20±1) °C.

The amount of water in ml, consumed from the burette for filling, corresponds to the volume of glass in cm. The water was poured, the glass is dried, weighed on a technical scale accurate to 0.01 g and placed under the funnel of the device.

A portion of powder poured on the walls of the funnel from a height of about 20 mm for 10−12 s until the powder is completely fill the glass and you begin to sleep from it.

Not compacting the powder, remove the excess metal or glass plate, holding the edges of the glass; the glass is then weighed on a technical scale accurate to 0.01 g

4.5.2. Bulk density (), g/cm, is calculated by the formula

,

where is the mass of the glass powder, g;

 — weight of empty beaker, g;

 — the volume of glass, cm.

For final result take an arithmetic average value of the results of two parallel measurements, the difference of which must not exceed 0.02 g/cm.

4.6. The mass of the ingot is determined by weighing on a balance with an accuracy of ± 0.1%.

(Added, Rev. N 1).

4.7. The test bars for compliance with the requirements of section 1.4 carry out linear measurement with a scale division of 1 mm or template.

To check the appearance of tellurium is carried out by inspection without the use of magnifying devices.

(Added, Rev. N 2).

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. Each ingot should be cast in the grade of metal or glued label with a designation of mark of tellurium.

5.2. Each ingot should be wrapped in wrapping paper according to GOST 8273 or GOST 2228.

5.3. Powdery tellurium should be Packed in plastic bag according to GOST 17811, or single or double bags of polyethylene film according to GOST 10354. Film thickness for double bagging not less than 0.060 mm, single-not less than 0,120 mm. Bags of powder should be sealed and placed in boxes according to GOST 5959 (types III, IV, V, VI) or GOST 2991 (types II-1, II-2). The boxes shall be sealed in accordance with the requirements of GOST 21650 steel tape according to GOST 3560 or wire according to GOST 3282.

Packaging of powdered tellurium in galvanized steel drums according to GOST 5044 BT PB, with sealed seams. On top of the powder should be closed paraffined paper GOST 9569, the cover drum must be soldered to the body across the generatrix.

The gross mass of the box or drum must not exceed 50 kg.

(Changed edition, Rev. N 1, 2).

5.4. Tellurium ingot must be Packed in wooden boxes according to GOST 5959 or GOST 2991. The gaps between the bars are filled with paper or other material that prevents contamination of tellurium.

The gross weight of the box should be no more than 50 kg.

5.5. Powdery tellurium, intended for long-term storage should be Packed and sealed in steel drums according to GOST 5044 type BT PBwith a net weight of 40 kg with sealed seams, ensuring tightness. The top layer of powder should be closed paraffined paper GOST 9569. Drum closing galvanized steel lid that is hermetically brazed to the housing across the generator and placed in a wooden box according to GOST 18573 wooden crate or according to GOST 12082.

5.6. On every box or drum should be marked with a stencil with indelible paint or affix or attach a label indicating:

the trademark or name of manufacturer and its trademark;

names products and their brand;

batch number;

the net weight and gross;

numbers packaging unit (for tellurium, intended for long term storage);

the date of manufacture.

designation of this standard.

The label with the results of chemical analysis of tellurium, intended for long storage, must be affixed directly to the drum.

5.3−5.6. (Changed edition, Rev. N 1).

5.7. Transport marking under GOST 14192. On the packaging of powdered tellurium apply a handling mark «Sealed package».

Technical tellurium during transportation of non-hazardous according to GOST 19433 not classified.

(Changed edition, Rev. N 2).

5.8. Marking of tellurium, intended for long term storage, you must complete a dye.

(Changed edition, Rev. N 1).

5.9. Technical tellurium transporterowych by all kinds of transport in covered vehicles in accordance with cargo carriage regulations applicable to transport of this form or postal parcels in accordance with the rules of the Ministry of communications of the USSR. During transportation by railway transport — small and light shipments.

Tellurium transporterowych in containers according to the GOST GOST 20435 or 15102 or packages according to GOST 26663.

If you package should be used in flat wooden pallets according to GOST 9557 or wooden bruski section 70x70 mm, or the disposable pallet according to GOST 26381, and metal pallets according to normative-technical documentation.

The means of fastening of packages — according to GOST 21650.

Overall dimensions of the package — according to GOST 24597. The weight of the package — not more than 1250 kg.

When transporting small shipments tellurium drawer fronts covered with packing tape according to GOST 3560, bonded lap joint, with rail transport to the castle. When transporting postal parcels drawer fronts steel packing tape upholster.

(Changed edition, Rev. N 2).

5.10. Tellurium should be kept indoors.

(Changed edition, Rev. N 1).

5.11. Ingots and powder of tellurium, intended for export, are accompanied by documentation in accordance with the order of foreign trade enterprises.

(Added, Rev. N 1).

6. THE MANUFACTURER’S WARRANTY

6.1. The manufacturer guarantees the conformity of tellurium with the requirements of this standard, under the conditions of transportation and storage prescribed by the standard.

6.2. Warranty period of storage of powdered tellurium — 7 years from the date of manufacture, tellurium in bars without restrictions.

(Changed edition, Rev. N 1).

6.3. (Deleted, Rev. N 1).