Leaching process intensification of gold-bearing raw materials

Purpose. Research on the process intensification of gold-bearing product hydrometallurgical processing based mechanochemical milling initial sulphide material. Methods. Mechanochemical activating (oxidation) concentrate under conditions superfine milling, sulphite-thiosulphate leaching milled after liquid phase separation. The float sample with a particle size -0.074 mm, Au content is 15.5 g/t tested. When loading into mill an weighing 300 g, 600 ml calcium hydroxide solution concentration 143 g/l are added. weight balls loaded in relation to 10:1. remainder solid subjected lea-ching reagent. Findings. A sharp increase 10 µm fractions (from 14.05 34.63%) has been determined, and mass fraction gold final decreases from 13.0 g/t. This corresponds recovery at this stage level 16%. It found that additional supply 1 copper sulphate for it possible reduce 8.3 Thus, increases 16 48%. During process, partial by reagents formed its own sulphur revealed. transition caused formation water-soluble hydrosulphide complex during (AuS). As result reagent, 27% recovered. Originality. Phase transformations beneficiary as activation have determined. For first time implemented intensify mineral raw materials. Practical implications. research results can be used technological processes refractory ores technogenic