METHOD OF IDENTIFICATION OF NOBLE METALS IN SULFIDE ORES AND THEIR PROCESSING PRODUCTS Russian patent published in 2009 - IPC C22B11/02 G01N33/20 

FIELD: metallurgy.

SUBSTANCE: invention relates to analytical chemistry of noble metals (NM), namely to assaying and can be used for indentification of gold and platinum metals (PM) in the sulfide ores and their processing products. The method involves preparation of a mixture from a batch of a sample of the analysed material with sodium nitrate or potassium nitrate, lead monoxide, sodium carbonate, silicate glass, sodium tetraborate, calcium oxide, silver nitrate or silver chloride and carbonaceous reducer. The prepared mixture is heat treated at a temperature of 400-600°C for 20-30 min. This is followed by melting of the mixture at 1100-1300°C obtaining slag and lead alloy - lead bullion. After melting the heat products are cooled and separated. After separation the lead bullion is cupeled to obtain a silver or gold-silver globule and identify the content of noble metals in the globule using chemical and physical-chemical methods.

EFFECT: reduced costs because of reduced duratio of the analysis.

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