TUNGSTEN-MOLYBDENUM ORES FLOTATION BENEFICATION LOW-CARBONATE WASTES DISPOSAL METHOD Russian patent published in 2017 - IPC B09B3/00 

FIELD: chemistry.

SUBSTANCE: method includes the decarbonatization steps, element leaching and sediment treatment, in which decarbonatization is carried out by contacting the raw material, having the carbonate content less than 9% with 1N sulfuric acid solution at ratio C:L=1:2, for 1.5-2 hours to obtain the pulp. Leaching of the pulp is carried out at the temperature of 60-70°C for 2-3 hours in agitation mode with 1N sulfuric acid at the ratio of C:L=1:1 with the addition of 37% hydrogen peroxide solution in the amount of 0.05 l/kg of the pulp. Further, perform the decantating or filtration of this pulp to obtain the sediment and the mother solution, the sediment is washed with the industrial water with S:L=1:(2-3) for at least 0.5 hour, the sand fraction is separated and the resulting slurry is settled to form the settling solution. The solution, obtained after the sorption extraction of the elements, is combined with the settling solution and supplied to the head of the process to the decarbonatization stage.

EFFECT: using of this invention allows to provide disposal and neutralisation of tungsten-molybdenum ores flotation benefication low-carbonate tails without using the high-temperature technologies for collecting the sublimations.

4 cl, 2 ex, 1 tbl