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
    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.