COMPLEX PROCESSING METHOD OF RESIDUES OF DOMANIC FORMATIONS Russian patent published in 2015 - IPC C22B34/22 C22B59/00 C22B3/04 C22B3/24 

FIELD: mining.

SUBSTANCE: invention relates to a processing method of Domanic formations. The method involves agitation neutralisation - decarbonation by treatment with pulp of crushed ore or by a neutraliser of a hardened solution cleaned from aluminium so that a productive solution and decarbonated cake is obtained. Then, a clay product is leached from decarbonated cake in the form of nepheline with the hardened solution so that pulp sulphate is obtained. After that, autoclave oxidation leaching of uranium, vanadium, molybdenum and rare-earth metals is performed from a solid phase of pulp sulphate in presence of substances that oxidise vanadium selectively so that a hardened solution, which contains aluminium, vanadium, uranium, molybdenum and rare-earth metals, and insoluble residue is obtained. Gold and platinum is extracted from the insoluble residue. Potassium aluminium sulphate alum is extracted from the hardened solution. Uranium and molybdenum and vanadium and rare-earth metals are extracted from the productive solution.

EFFECT: extraction of aluminium, uranium, vanadium more than 90%, reduction of emissions to atmosphere due to complex use of residues of Domanic formations.

16 cl, 1 dwg, 1 ex