The froth floatation process used for the con | vedclass

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(D) . The froth floatation process is based on the difference in wettability of different minerals. The metallic sulphide particles are preferentially

Vedclass · Accepted Answer

All are correct statements.

Vedclass · Answer

(D) . The froth floatation process is based on the difference in wettability of different minerals. The metallic sulphide particles are preferentially wetted by oil,while the gangue particles are wetted by water.$B$. Sodium ethyl xanthate $(C_2H_5OCS_2Na)$ acts as a collector. It attaches to the mineral grains via polar groups,making them water-repellent so they pass into the froth.$C$. $NaCN$ is used as a depressant to separate $ZnS$ and $PbS$. It forms a soluble complex with $ZnS$ $(Na_2[Zn(CN)_4])$,preventing it from floating,while $PbS$ remains in the froth.Therefore,all the given statements are correct.

The froth floatation process used for the concentration of sulphide ore:

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