METHOD OF SELECTIVE FLOTATION ADJUSTMENT Russian patent published in 2017 - IPC B03D1/02 B03B13/00 

FIELD: technological processes.

SUBSTANCE: selective flotation process adjustment method includes the depressing reagents dosage according to the electrochemical parameters of the pulp. The potential difference between molybdenum and cadmium electrodes is measured in the pulp flow, and according to the measured potential difference of the bimetallic electrode pair from the specified optimum value, correct the depressing agent feeding so, that at the increase of potential difference reduce the reagent dosage, and at the potential difference decrease increase the dosage of the reagent. The alkalies such as lime milk are used as the zinc sulphides and iron depressant. The silicon contained depressants, such as sodium fluorosilicate are used as a dead rock depressant. The sulfoxide compounds, such as zinc sulfate are used as the zinc sulfide depressants. The sulfurous acid salts and its derivatives, such as sodium hydrosulfite are used as the iron sulphide depressant. At scheelite ores flotation, using the steaming according to Petrov's method of the fatty-acid collector desorption from the minerals surfaces, additionally perform the calcium salts dosage, such as CaCl₂, which flow rate is adjusted based on the measured potential difference between the molybdenum and cadmium electrodes. At flotation of copper-molybdenum ores, using environment controller, such as sodium carbonate; sulfhydryl collectors - xanthate, aeroflot, or its derivatives; depressants, such as sodium sulfide and apolar collector, such as diesel fuel, in the ore cycle the reagents dosage is corrected according to the measured potential difference between the molybdenum and cadmium electrodes.

EFFECT: reliability and accuracy increase of the depressing reagents dosage control.

7 cl, 18 dwg, 7 tbl, 4 ex