FOERFARANDE Foer ANRIKNING AV STENKOL by means of FLOTATION ANVAENDNING AV FOERBEHANDLAT UNDER WATER.

摘要

A process for the beneficiation of coal by froth flotation comprising surface treating particulate coal with a polymerizable monomer, a polymerization catalyst and a liquid organic carrier thereby rendering said particulate coal hydrophobic and oleophilic and introducing said surface treated particulate coal to a froth flotation vessel containing a water wash medium thereby resulting in a froth phase and an aqueous phase, the improvement comprising pre-treating said water wash medium prior to introducing said surface treated particulate coal with an organic carboxylic acid.