COAL FLOTATION METHOD Russian patent published in 1994 - IPC

FIELD: mineral concentration. SUBSTANCE: method of coal flotation comprises steps of preliminary pulping, conditioning coal with reagent mixture of collector, being tractor kerosene, and of foaming agent, being bottoms of butyl alcohols, subsequent their separation with receiving concentrates of combustible mass; at conditioning introducing in addition a technical product, had been received at reaction of ethylene glycol with three molls of ethylene oxide at presence of alkali catalysts. Ratio of tractor kerosene, bottoms of butyl alcohols and the technical product is equal to 96,9-2.7: 0.4 - 96.2: 2.87: 0.9. EFFECT: enhanced efficiency. 1 cl, 1 dwg, 4 tbl