METHOD OF PROCESSING OF COBALT-BEARING MANGANESE-IRON CRUST FORMATIONS Russian patent published in 2005 - IPC

FIELD: non-ferrous metallurgy; methods of processing of cobalt-bearing manganese-iron crust formations.

SUBSTANCE: the invention is pertaining to non-ferrous metallurgy and may be used at processing of cobalt, nickel, manganese and copper. The cobalt-bearing manganese-iron oceanic crust formations are crushed to the sizes of the source raw - 90 % - 0.074 mm and leached in 2 stages at the air pressure. On the first stage conduct lixiviation by 3.5-7 % solution of sulfuric acid at the temperature of 15-25°C within 0.5-1.5 hours with the subsequent filtration. On the second stage leach a solid phase by the filtrate of the first stage at pH = 2.5-3.5 at presence of a reducing agent at the mass ratio of the reducing agent to the cobalt-bearing manganese-iron oceanic crust formations as (0.01-0.075):1. The gained solution is filtered with production of a filtrate and a solid phase and reprocess the filtrate with extraction of commercial products. In the capacity of the reducing agent use sodium sulfite, sodium bisulfite, permonosulfuric acid, hydrogen peroxide, hydrogen sulfide, monochlorous copper. The invention ensures a decreased consumption of reactants, increased extraction of cobalt, nickel, manganese and copper.

EFFECT: the invention ensures a decreased consumption of reactants, increased extraction of cobalt, nickel, manganese and copper.

2 cl, 1 dwg, 7 tbl