Gold K31
Gold Zl 99.9 (Zl 999)
Gold Zl 99.99 (Zl 999.9)
Gold ZlA-1 (Zl 999.9m)
Gold ZlA-1P
Gold ZlA-2
Gold ZlA-3
Gold K31
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | К31 |
| Designation GOST Latin | K31 |
| Transliteration | K31 |
| The chemical elements | Co31 |
Description
Gold K31 is used: for processing to extract gold and silver.
Note
Cathode gold on carbon and graphite based.
Standards
| Name | Code | Standards |
|---|---|---|
| Non-ferrous metals, including rare metals, and their alloys | В51 | TU 117-2-3-78 |
Chemical composition
| Standard | Au |
|---|---|
| TU 117-2-3-78 | The rest |
Au is the base.
According to TU 117-2-3-78 the amount of gold and silver is not less than 70.0%. Total impurities not more than 30.0%, including: carbon ≤5.0%; the amount of iron, copper and zinc ≤10,0%; the sum of calcium oxide, silica and alumina is ≤15.0%. The cathode gold must be carefully washed from cyanides, thiourea and acids. The moisture content in cathode gold should not be more than 2.00%.
According to TU 117-2-3-78 the amount of gold and silver is not less than 70.0%. Total impurities not more than 30.0%, including: carbon ≤5.0%; the amount of iron, copper and zinc ≤10,0%; the sum of calcium oxide, silica and alumina is ≤15.0%. The cathode gold must be carefully washed from cyanides, thiourea and acids. The moisture content in cathode gold should not be more than 2.00%.
Technological properties
| Name | The value |
|---|---|
| Features of production | Cathode gold on the other 117-2-3-78 before testing should be calcined at a temperature of 600 °C for 3-4 hours. |
