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Investigation of the flotation performance of nickel sulphide by high intensity agitation pretreatment

ABSTRACT The effects of configuration of the stirred tank and energy input on the flotation performance of nickel ores were systematically investigated in this paper. Flotation tests revealed that the stirred tanks with two impellers had an advantage over those with one impeller in intensifying agitation pretreatment, and the higher agitation speed led to a better flotation performance of nickel ores. It was also found that with baffles in the stirred tanks, the flotation grade was higher than that without baffles. Besides, the energy supplied to the system significantly influenced the flotation recovery, indicating that if the energy consumption of the agitation pretreatment is ideal, the improvement of the flotation efficiency can be achieved. Also, data from full-scale operations backed up these results.