METHOD FOR REDUCING LOSS OF VALUABLE SUBSTANCES IN ENRICHMENT OF MINERAL RAW MATERIALS (VERSIONS) AND ITS APPLICATION (VERSIONS) Russian patent published in 2018 - IPC B03B7/00 B03D1/02 B03D1/08 

FIELD: chemistry.

SUBSTANCE: method for reducing the loss of valuable substances in the enrichment of mineral raw materials, wherein the mineral mixture after the first stage of separation, dry or suspended, contains a fraction with a zone of gangue and a surface zone of valuable substances, and the zone of gangue exceeds the zone of valuable substances. For agglomeration of pellets of the grain-size fractions with the zone of valuable substances, the mineral mixture, if it is not already in the form of suspension, is suspended, and at least one anionic surfactant and at least one oil are added to the suspended mineral mixture to wet the surface of the zone of valuable substances in order to form liquid bridges between the zones of valuable substances and pellets. The mineral mixture in the solution saturated with the fraction of valuable substances and gangue is redirected to the wet separation stage for classification into a fraction depleted of valuable substances and a fraction more enriched with valuable substances. At the wet separation stage, separation is performed by flowing a liquid film. The fraction more enriched with the valuable substances taken from the wet separation stage is subjected to wet grinding and the fraction ground by wet grinding is fed to the next stage of the classification. This method is used to isolate calcite from a mixture containing quartz. In another version, at least one cationic surfactant and at least one oil and/or at least one volatile substance obtained from oil are added to the suspended mineral mixture, for wetting the surface of the zone of valuable substances to form liquid bridges between the zones of valuable substances and pellets. The method of the second version is used to isolate sylvite from a mixture of salts.

EFFECT: reduction of losses of valuable substances in the enrichment of mineral raw materials.

13 cl, 2 dwg, 4 ex