FIELD: extraction of precious metals such as platinum, palladium, gold etc from various kinds of mineral raw materials containing alkaline chlorides and alkaline-earth metal chlorides, such as composite concentrate produced from clay-salt wastes (slimes) of potassium production, marking clays etc.
SUBSTANCE: method involves providing chlorinating calcinations of concentrate having chloride content of 7-13%; leaching out cinder by diluted solution of aqua regia and carrying-out sorption of precious metals from pulp; performing chlorinating calcinations at temperature of 600-700 C. Method enables complex extraction of platinum group metals, gold and silver from mineral raw materials containing chlorides of alkaline and alkaline-earth elements.
EFFECT: increased efficiency and reduced production costs due to employment of chlorinating agent and owing to reduced number of operations.
2 cl, 3 tbl
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| METHOD OF PROCESSING OF RAW MATERIAL CARRYING NOBLE METALS WITH GAS RECOVERY | 2000 |
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RU2632742C2 |
