VALUABLE MINERAL COLLECTION METHOD FROM FLY ASH BY PARTICLE SEPARATION

摘要

The present invention relates to a collecting method of high grade valuable mineral such as silica and mullite from fly ash with good yield and more particularly, to a selective collecting method of valuable mineral such as silica and mullite with high quality and good yield from fly ash which is discarded from a coal power plant by implementing a particle size selection process. [Reference numerals] (AA) Water; (BB) Water+Fly ash; (CC) Floatation separation; (DD) Cenosphere collecting; (EE) Floatation separation (collector addition); (FF) Unburned carbon collecting; (GG) Magnetic force filtering; (HH) Magnetic material; (II) Centrifugal gravity separation; (JJ) Magnetite (Fe_4O_2) collecting; (KK) Nonmagnetic material; (LL) Centrifugal gravity separation; (MM) Collecting of metallic heavy mineral as like Fe_2O_3; (NN) Light minerals; (OO) Floatation separation (collector,foaming agent addition); (PP) Silica collecting; (QQ) Mullite collecting; (RR) less than 25μm; (SS) more than 90μm; (TT) less than 25μm; (UU) more than 25μm; (VV) Discard; (WW) Silica collecting; (XX) Discard; (YY) Mullite collecting; (ZZ) Discard