Explain the purification of sulphide ore by froth flotation method?

Question: Explain the purification of sulphide ore by froth flotation method?

The froth flotation method is used for the purification of sulphide ores such as copper, lead, and zinc. The ore is crushed and ground into a powder, and then mixed with water and a frothing agent. Air is then passed through the mixture, which causes the sulphide particles to stick to the bubbles and float to the surface as a froth. The froth is then collected and dried, and the concentrated sulphide minerals are separated from the gangue minerals. This process is effective because the sulphide minerals are hydrophobic (repel water) while the gangue minerals are hydrophilic (attract water), allowing for easy separation.

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