Question

How do we separate two sulphide ores by Froth Floatation Method? Explain with an example.

Answer 1

Two sulphide ores can be separated by adjusting proportion of oil to water or by using depressants.

For example in case of an ore cotaining ZnS and PbS , the depressant NaCl is used .

It forms complex with ZnS and prevents its coming with forth , but PbS remains with forth and can be separated .