METHOD OF CONTROLLING PROCESS OF BIOOXIDATION OF SULPHIDE CONCENTRATES Russian patent published in 2015 - IPC C22B3/18 C22B11/00 C22B19/00 

FIELD: chemistry.

SUBSTANCE: method includes controlling flow of air fed for biooxidation and the rate of mixing in a tub where biooxidation is carried out, based on concentration of divalent iron ions in a pulp, while ensuring a near zero concentration value. When the concentration of divalent iron ions in the pulp increases to more than 0.5-1.0 g/dm³, the flow of air fed for biooxidation and the rate of mixing are increased. In the absence of divalent iron ions in the pulp, the flow of air fed for biooxidation and the rate of mixing are reduced until traces of divalent iron ions appear to a near zero concentration.

EFFECT: simple, accurate and fast control of the process of biooxidation of sulphide concentrates, high redox potential and efficiency of biooxidation of sulphide concentrates, low power consumption of biooxidation.

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