PROCESSING METHOD OF IRON-CONTAINING WASTES Russian patent published in 2015 - IPC C22B7/04 

FIELD: metallurgy.

SUBSTANCE: invention relates to disposal of metal-containing wastes with iron content 15% and over, such as slags of copper and nickel manufacturing processes, sludge of copper ore floatation and similar materials, and may be used during manufacturing of the construction materials and metal extraction. Iron-containing wastes are milled to particles size 1-2 mm, mixed with carbonic deoxidant, subjected to reducing roasting at temperature 0.6-0.8 of melting point of most churlish oxide phase of the material. The final stage of the reducing roasting is performed at temperature at least equal to melting point of the less churlish oxide component. The obtained mixture is cooled by thermal shock with rate at least equal to lesser critical cooling rate for the given component, milled to particles size 1 mm and separated by separation method to metal and oxide components.

EFFECT: invention ensures comprehensive processing of the wastes and increases extraction of the metal component.

2 cl, 4 tbl