METHOD OF REPROCESSING SULFUR-CONTAINING SULFIDE MATERIAL Russian patent published in 1994 - IPC

FIELD: hydrometallurgy. SUBSTANCE: an aqueous sulfur-containing sulfide slurry is treated with calcium hydrophylic agent (lime, calcium sulfide, nepheline slurry, portland cement clinker) in the presence of an organic surface- active agent such as higher aliphatic alcohols, petroleum adsorption resins, vegetable oils and the like at a temperature that is above of the melting point of elemental sulfur followed by addition of 1-25 % by weight (based on sulfur-sulfide material) of mixture consisting of freshly formed calcium sulfate and elemental sulfur, with a weight ratio between freshly formed calcium sulfate and elemental sulfur being 1:(8- 100). After cooling and flotation of the resulting pulp there is obtained a sulfur concentrate and sulfide concentrate. As the mixture consisting of freshly formed calcium sulfate and elemental sulfur there may be used a portion of the obtained sulfur concentrate. EFFECT: improved quality of flotation concentrates. 1 cl, 1 tbl