FIELD: metallurgy.
SUBSTANCE: method for determining precious metals in ores and their derivatives involves preparation of mixture from sample of the analysed material with fluxes, lead oxide, silver nitrate or chloride and carbon-bearing reducing agent. Then, mixture is molten at temperature of 1100-1300°C so that slag and lead alloy is obtained in the form of lead bullion. After that, cupellation of lead bullion is performed till silver globule is obtained, and content of precious metals in silver globule is determined with chemical and physical-chemical methods. At that, prior to cupellation to lead bullion there added is tin metal in quantity of 0.4÷1.0% of lead bullion weight, and cupellation is performed at temperature of 880÷930°C.
EFFECT: improving the accuracy of determining the content of precious metals owing to preventing their oxidation during cupellation process.
3 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF IDENTIFICATION OF NOBLE METALS IN SULFIDE ORES AND THEIR PROCESSING PRODUCTS | 2008 |
|
RU2365644C1 |
| METHOD OF ASSAY DETERMINATION OF CONTENT OF GOLD IN ORES AND IN PRODUCTS OF THEIR PROCESSING | 2005 |
|
RU2288288C1 |
| A METHOD OF ASSAY OF GOLD AND SILVER IN ORES AND CONCENTRATES | 0 |
|
SU1431482A1 |
| METHOD OF QUALITATIVE AND QUANTITATIVE DETERMINATION OF ORGANIC COMPOUNDS OF NOBLE METALS IN ROCKS OF VARIOUS COMPOSITIONS | 2007 |
|
RU2354967C1 |
| METHOD OF DETERMINATION OF GOLD AND SILVER CONTENT IN SULPHIDE ORES AND PRODUCTS OF THEIR PROCESSING | 2012 |
|
RU2494160C1 |
| PROCEDURE FOR DETERMINATION OF GOLD IN ORE AND CONCENTRATES | 2010 |
|
RU2434063C1 |
| METHOD OF PROCESSING GRAVITY SEPARATION CONCENTRATES CONTAINING PRECIOUS METALS | 1999 |
|
RU2156820C1 |
| GOLD CONTENT DETERMINATION IN GOLD-CONTAINING RAW MATERIAL | 2003 |
|
RU2245931C1 |
| 0 |
|
SU145895A1 | |
| METHOD FOR PROCESSING SULFIDE CONCENTRATES CONTAINING LEAD, NON-FERROUS AND NOBLE METALS | 2006 |
|
RU2316606C1 |
