Gold K31

Designation

Name The value
Designation GOST Cyrillic К31
Designation GOST Latin K31
Transliteration K31
By 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, and their alloys В51 TU 117-2-3-78

Chemical composition

Standard Au
TU 117-2-3-78 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%.

Technological properties

Name The value
Particularities of production of goods Cathode gold on the other 117-2-3-78 before testing should be calcined at a temperature of 600 °C for 3-4 hours.