EXTRACTION OF Fe, Mn, Ni, Co, Cu, Al FROM CAKE OBTAINED AFTER SODA SINTERING AND LEACHING OF TUNGSTEN CONCENTRATE, BY CALCINATION WITH TABLE SALT AND HYDROCHLORIC ACID LEACHING WITH PEROXIDE Russian patent published in 2019 - IPC C22B3/06 C22B34/36 

FIELD: metallurgy.

SUBSTANCE: invention relates to hydrometallurgy of non-ferrous metals and can be used in processing concentrates, industrial products and solid wastes containing metals. Method of metal ions extraction includes annealing and leaching. Cake obtained after soda sintering and leaching of the tungsten concentrate is washed with 3 n. solution of HCl, roasted with table salt at a ratio of weights of cake and salt of 1:1 at 300 °C for 4 hours. Then acid leaching of metals is performed by 3 n. solution of HCl and peroxide taken with 50 % excess against stoichiometric oxidation of metals to higher oxides, at temperature of 70 °C. Then the cake is washed with 3 n. HCl solution at temperature of 70 °C.

EFFECT: technical result when implementing the invention consists in intensification of the leaching process and more complete extraction of metals from the materials containing them into the solution.

1 cl, 2 dwg, 4 tbl, 1 ex