PROCEDURE FOR PURIFICATION OF IRON CONTAINING MATERIAL FROM ARSENIC AND PHOSPHORUS Russian patent published in 2011 - IPC C22B1/11 C22B3/12 

FIELD: metallurgy.

SUBSTANCE: procedure consists in crumbling material and in its leaching. Also, material crumbling and leaching is performed in concentrated solution of sodium chloride when compounds of arsenic and phosphorus are dissolved to suspension. Produced suspension is subjected to gravitation separation to a solid phase of concentrated iron containing material and to suspension of dispersed impurities. The separated solid phase of iron containing material is further subjected to washing with acid concentrated solution of sodium chloride.

EFFECT: raised contents of iron in iron containing material at diminished contents of arsenic and phosphorus to standard values, reduced duration of process, and consumption of reagents and lowered prime cost.

5 cl, 1 dwg, 1 tbl, 3 ex