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How much reagents to use in galena - sphalerite flotation (1 reply)

6 months ago
dimanmarfi 6 months ago


what is method is used for determination amount of collector, frother, depressant, activator, ... in lead - zinc flotation on industrial scale?

what is relationship between particle size of ore in pulp and  aeration and stator speed ?


best regard



Jorge Ganoza
6 months ago
Jorge Ganoza 6 months ago
1 like by David

In order to select the reagents and the dosage is important to perform flotation tests. In the testing program is  common to evaluate different types of collectors, depressants, frothers, pH regulators, surface modifiers,etc. Also, it is possible to evaluate different dosages to select the optimum.

When the reagents are added in the process plant, the addition can be expressed in cm3/min or kg/min. To get the flow rate the metallurgist use the dosage from the testing program and the tonnage. Reagents can be added by means of metering pumps, solenoid valves, or mechanical devices (e.g. Clarkson Feeder). The control is performed by means of a cylinder and a chronometer. A control loop  can be considered to add some reagents (e.g. lime, copper sulphate).

The stator geometry has an impact on the rotor speed and aeration. The slurry density is other factor to consider. For instance, some flotation cells works well at high densities (42% solids) and other has problems at high slurry densities.

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