METHOD OF FLOTATION OF NONFERROUS ORES Russian patent published in 1999 - IPC

FIELD: flotation concentration of minerals; applicable in processing of copper-nickel and copper-molybdenum ores containing iron sulfides. SUBSTANCE: method includes grinding of ore in natural medium; pulp conditioning with sodium or ammonium fluosilicate, iron complexing hydroxy compound, with maintaining optimal relationship Between oxidizing potential and concentration of hydrogen ions pH in compliance with Eh=272-59 pH in processing of pyrrhotine-containing ores, or Eh=505-59 pH in processing of pyrite-containing ores; subsequent introduction into pulp of sodium sulfide by maintaining Eh= 272-59 pH. In so doing, in processing of pyrite-containing ores containing in pulp liquid phase of no copper cations, prior to supply of sodium, or ammonium fluosilicate, copper sulfate is added. Its consumption is regulated by optimal relationship between potential of argentite electrode and hydrogen ion concentration of Ecu=477-59 pH. EFFECT: elimination of harmful effect of iron hydroxy compounds in pulp liquid phase and on surface of sulfide minerals to ensure higher recovery of valuable minerals. 2 cl, 4 dwg