FIELD: metallurgy.
SUBSTANCE: method of pyrometallurgical extraction of silver from secondary lead-bearing stock comprises stock furnacing in two steps. First, lead-bearing stock is furnaced at 1150-1200°C, the melt being cooled to 400°C at the rate of 1950°C/h to 2050°C/h. Then, the melt is heated from 400°C/h to 500°C/h to 1150-1200°C to remove the yellow lead from silver surface.
EFFECT: higher yield of silver.
1 tbl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF SILVER EXTRACTION FROM SCRAP OF SILVER-ZINC BATTERIES CONTAINING LEAD | 2014 |
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| METHOD OF IDENTIFICATION OF NOBLE METALS IN SULFIDE ORES AND THEIR PROCESSING PRODUCTS | 2008 |
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| METHOD OF REPROCESSING ACCUMULATOR LEAD SCRAP | 1997 |
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| METHOD OF LEAD ALLOY CONCENTRATION BY NOBLE METALS | 1995 |
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RU2094504C1 |
| METHOD FOR EXTRACTING GOLD FROM CONCENTRATES | 2010 |
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| METHOD FOR PROCESSING SULFIDE CONCENTRATES CONTAINING LEAD, NON-FERROUS AND NOBLE METALS | 2006 |
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| SILVERY FOAM PROCESSING METHOD BY VACUUM DISTILLATION | 2018 |
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RU2698237C1 |
| METHOD FOR OBTAINING CONCENTRATE OF PRECIOUS METALS FROM PRODUCTS OF ORE PROCESSING AND SECONDARY RAW MATERIALS | 2017 |
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RU2673590C1 |
| METHOD FOR PROCESSING OF AURUM-CONTAINING HALF-FINISHED PRODUCTS | 1996 |
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RU2095446C1 |
