METHOD OF AIR-GRAVITY PROCESSING OF SLAKING METALLURGICAL SLAG Russian patent published in 2012 - IPC C22B7/04 

FIELD: metallurgy.

SUBSTANCE: invention may be used to process a slaking metallurgical slag, namely, to extract a metal component from it, preventing its usage as a raw component in production of construction materials. The metallurgical slag is exposed to hot sizing with cooling, air and magnetic separation and grinding. After hot sizing the slag is exposed to hot processing, which includes simultaneously performed operations of selective grinding, cooling and air separation. At the same time in process of hot processing a mixture is produced, containing a slag of intermediate fractions and non-ground metal particles, which are further dressed, and the remaining non-metal component is exposed to additional processing in several cycles, each cycle of which includes selective grinding, air separation and separation of particles according to the specified size. At the same time the number of cycles of additional processing is selected with the possibility to transfer the entire non-metal component of the slag into a dust fraction with its subsequent extraction from the mixture by means of air separation.

EFFECT: higher efficiency of metallurgical slag processing and lower level of capital and operational expenses for its realisation.

8 cl, 4 ex