Question:
What is the Role od Deprassant In Froth Floatation
Answer:
Deprassants, in froth floatation process, is required in the separation of sulfide ores. Depressants help in separation as it prevents the frothing of the sulfide ores. For example, a mixture of zinc sulfide and lead sulfide ores are separated by using NaCN as the depressant. NaCN forms a complex with zinc [Na2(Zn(CN)4)] and removes it from the mixture.
The chemical equation for the above reaction is -
4 NaCN + ZnS → Na2[Zn(CN)4] + Na2S
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