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GOLD INGOT
GOST 28058-2015

 

Gold is manufactured by processing of the copper anode slime produced during copper electrolytic refinery. Due to the unique gold refining process, the gold has high quality.

Gold ingots are manufactured in grade rating as ZlA-1P, ZlA-1, ZlA-2, ZlA-3 and ZlA-4.

Chemical composition of gold:

Grade Mass fraction, %
Au, not less Impurity, not more, %
Ag Pt Pd Cu Pb Zn Bi
ZlA-1P 99,99 0,005 0,0005 0,0005 0,0005 0,0005 0,0005 0,0005
ZlA-1 99,99 0,005 0,001 0,003 0,001 0,001 0,001 0,001
ZlA-2 99,98 0,015 0,005 0,005 0,005 0,005 0,001 0,001
ZlA-3 99,95 0,035 0,005 0,010 - - - -
ZlA-4 - - - - - - - -

 

Grade Mass fraction, %
Impurity, not more, %
Mn Cr Ni Sb Rh Fe Sn Si Mg Total
ZlA-1P 0,0005 0,0005 0,0005 0,0005 0,0005 0,0005 0,0005 0,001 0,001 0,01
ZlA-1 0,0005 0,0005 0,0005 0,001 0,001 0,001 0,001 0,003 0,003 0,01
ZlA-2 0,0005 0,0005 0,0005 0,001 0,001 0,001 0,001 - - 0,02
ZlA-3 - - - - 0,002 - - - - 0,05
ZlA-4 - - - - - - - - - 0,1
Notes:
1. Sign "-" means in the table that the impurity is measured but not standardized.
2. Column "Total" summarizes all impurities listed in the table.

Surface of gold ingots is free from beadings, burrs, scratches, grease spots or foreign inclusions.

It is allowable for face of gold ingot to have scraping spots of less than 1 mm deep, and less-than-5-mm waviness as a result of shrinkage during crystallization of gold.

Surface of each ingot is subject to inspection, marking and weighing. The weight of ingot shall be within the range of 11 to 13.3 kg. The ingots are manufactured in form of truncated pyramid.

On approval with customer it is allowed to manufacture other ingots in term of shape, weight and dimensions.

Quality management system, environmental management system, and OHSAS management system was certified by TÜV NORD, German certification body, against requirements of standards ISO 9001:2015, ISO 14001:2015 and OHSAS 18001:2007.

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