METHOD FOR COMPLEX ASH PROCESSING OF HEAT POWER PLANTS WASTE PILES AND PLANT FOR COMPLEX ASH PROCESSING OF HEAT POWER PLANTS WASTE PILES Russian patent published in 2017 - IPC B03B9/04 B09B3/00 

FIELD: power industry.

SUBSTANCE: complex ash processing method of heat power plants waste piles includes the separating of ash pulp into the coarse and fine fractions, flotation, and magnetic separation to obtain the target products. The coarse fractions of ash are separated on the screens for using in the production of concrete mixtures. Ash fine fractions and subjected to the main and cleaner flotation, filtration and drying, to obtain a carbon concentrate. The separated at the primary flotation the tail fractions are subjected to magnetic separation and drying to obtain magnetite and silica-alumina concentrate. The aluminosilicate concentrate is grounded in the ball mill upto the fine fraction, filtered and dried. During the primary flotation the collector-kerosine and pine oil is used as the blowing agent. The cleaner flotation is carried out on the return water. The method is carried out on the complex ash processing plant of heat power plants waste piles, containing the means for separating the ash pulp into the coarse and fine fractions, as well as flotation and magnetic separation to obtain the target products. The ash pulp separator is designed as the screen, which outlet of the coarse fraction is connected to the inlet of the first section for the production of concrete mixtures. The screen outlet of the fine fraction is connected to the first flotation machine inlet for the main flotation, the first outlet of which is connected through the second machine of the cleaner flotation, filtration and drying units with the the second section inlet for the coal concentrate storing. The second outlet of the first flotation machine is connected with the first inlet of magnetic separation unit, the first outlet of which is connected through the drain silo with the third section inlet for the magnetite concentrate storing. The second outlet of the magnetic separation unit is connected through the thickener and drying units with the third section inlet for the aluminosilicate concentrate storing. The drain silo outlet of water is connected to the second inlet of the magnetic separation unit.

EFFECT: fullest recovery from the wet ash waste piles of power heating plant of the target useful products in the form of ash coarse fraction for the concrete mixtures production, carbon for using as a boiler fuel, magnetite concentrate as a raw material for the metal industry and active aluminium silicate additive for construction materials productions.

5 cl, 1 dwg, 1 tbl 2 ex