| 摘要 |
FIELD: precious metal manufacture. SUBSTANCE: invention may be used when isolating gold, silver, and platinum group metals from materials containing thereof, and mainly in finishing operations when dressing gold-containing raw. Concentrate is mixed with gallium-based collector at ratio from 5: 1 to 1:1 in presence of alkali at 25-40 C. Collector additionally contains 6-8% tin, which lowers its melting point and limiting wetting angle. Resultant mix is cooled to 0-17 C prior to be washed with water, which promotes solidification of mix excluding entrainment of precious metal particles and their irreversible loss. Before filtration, mix is heated to melting temperature of collector. EFFECT: improved procedure. 3 cl, 1 tbl |
