PROCEDURE FOR PURIFYING RETURN WATER OF GAS CLEANING IN SMELTING FURNACES, UTILISATION OF METAL CONTAINING SLIMES AND DEVICE FOR IMPLEMENTATION OF THIS PROCEDURE Russian patent published in 2011 - IPC C22B7/00 B03C1/00 

FIELD: metallurgy.

SUBSTANCE: metal containing slime is subjected to magnetic separation under flow mode where purified return water is separated and there is produced slime suspension subjected to magnetic dehydration and condensation, drying and compression in form of briquettes. Gases and volatile compounds emitted at drying are trapped when they are passed through in a centrifugal field at presence of liquid. Purified return water is used in a system of gas cleaning, while return water withdrawn during the process of dehydration and condensation is directed to the beginning of magnetic separation process. The device for implementation of the procedure consists of a magnetic separator for separating metal containing slime and for purification of return water, of a uniflow furnace with a rotating drum, of a rotoklon and of a press of a rotor type. It is equipped with an additional magnetic separator for dehydration of slime suspension produced in the said magnetic separator and with a belt press of a decanter installed before the uniflow furnace with a rotating drum. The magnetic separator for separation of metal containing slime and purification of return water is pressure tight.

EFFECT: efficient extraction of metal containing slimes from return process liquids.

5 cl, 1 dwg