| 摘要 |
PURPOSE: A resource collection method using fly ash is provided to extract useful resources from the fly ash including cenospheres, unburned carbon, magnetite, silica, and mullite for using as industrial materials, and to reduce the amount of the wasted fly ash. CONSTITUTION: A resource collection method using fly ash comprises the following steps: mixing a processing water and the fly ash, and collecting cenospheres floating on the mixture; adding a collector for separating unburned carbon to the remaining solution, and collecting the unburned carbon; separating the remaining solution into magnetic materials and non-magnetic materials using magnetic power; collecting magnetite (Fe3O4) through assorting the magnetic materials by centrifugal specific gravity; and collecting metallic heavy minerals through assorting the non-magnetic materials by centrifugal specific gravity. [Reference numerals] (AA) Processing water; (BB) Processing water + fly ash; (CC) Floating separation; (DD) Collecting cenospheres; (EE) Floating separation (adding collector); (FF) Collecting the unburned carbon; (GG) Magnetic selection; (HH) Magnetic material; (II,LL) Centrifugal specific gravity separation; (JJ) Collecting magnetite (Fe_3O_4); (KK) Non-magnetic material; (MM) Light mineral; (NN) Collecting heavy minerals including Fe_2O_3; (OO) Floating selection (adding collector and foaming agent); (PP) Collect silica; (Q1) Round silica; (Q2) Non-round silica; (RR) Collect mullite; (S1) Round mullite; (S2) Non-round mullite; (T1,U2) Membrane filter; (T2) Over 5μm; (T3) Under 5μm; (U1) Wet pulverizing; (U3) Under 2μm |
