文件类型：PDF文档
文件大小：225K
FIELD : metallurgy.SUBSTANCE : invention relates to the metallurgy, in particular to method of complex ores preparation for acid leaching with extraction of the non-ferrous, rare, rare-earth metals (R&REM) and platinum-group metals (PGMs). The method of complex ores preparation for leaching includes crushing, grinding of the feed stock containing the organic substance, non-ferrous, rare, rare-earth metals and platinum-group metals, classification and further acid leaching. Feed stock is crushed to output grain size 0.2-0.1mm. Classification is performed in the hydraulic cyclone with division to sand fraction and drainage (sludge part), that after removal of the alumina with residues of silicon dioxide and organic substance is delivered for acid leaching together with sand fraction. The acid leaching is performed by two stages.EFFECT : complex extraction of the specified metals from having complex composition ore upon sufficient economical crushing of the input material.4 tbl