DEVICE FOR HEAT TREATMENT OF ALUMINUM HYDROXIDE Russian patent published in 2023 - IPC C01F7/47 

FIELD: non-ferrous metallurgy.

SUBSTANCE: invention can be used for drying, dehydration and calcination of powdered materials, mainly for heat treatment of aluminium hydroxide in the production of alumina of various grades. The device contains an electric filter, including at least two fields, a dust extraction tank for the second field of the electric filter, a dumping tank, a dust receiving tank for the first field of the electric filter, a preliminary cleaning cyclone connected to a storage tank, a fluidized bed cooler, which is connected by an air duct to a circulation cyclone through which calcined material is fed into the fluidized bed cooler cyclone. The dust extraction tank is connected by means of a material pipeline to the discharge tank and a system of pneumatic chamber pumps to enable the captured dust of the second field of the electric filter to be discharged into the finished product silo.

EFFECT: invention makes it possible to reduce losses of material to be calcined, increase equipment productivity and reduce specific fuel consumption, as well as separate fine fractions of alumina from gas and dust streams and remove them from the technological process.

6 cl, 2 dwg