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| 1. |
State the role of Depressant in froth floatation process. |
| Answer» SOLUTION :A depressant is USED when two sulphides are present in thr ORE. For example in the mixture of ZNS and PbS, NaCN is used as depressant. It selectively prevents ZnS from COMING to the froth but allows PbS to come to the froth. | |