SUBSTANCE: invention refers to metallurgy of precious metals, and namely to processing of slurries and concentrates containing elementary silicon, carbon and platinum. Similar slurries are formed namely at dilution of platinum-containing cast-iron in sulphuric acid. Slurries are mixed with sodium carbonate at consumption of 120-150% of the weight of silicon and carbon in initial material and sintered at the temperature of 500-650°C during 1-2 hours. Sintered material is leached in water so that insoluble residue containing precious metals and being a concentrate of precious metals is obtained.
EFFECT: simpler technology and higher quality of concentrate.
|Translated title of the contribution||METHOD FOR EXTRACTING PLATINUM FROM SLURRY OBTAINED AT DILUTION OF PLATINUM-CONTAINING CAST-IRON IN SULPHURIC ACID: patent of invention|
|IPC||C22B 11/00,C22B 7/00,C22B 1/16,C22B 3/04|
|Publication status||Published - 27 Jul 2013|