Question

3. By what processes do you concentrate the following ores:
i) PbS(galena) ii) Fe2O3(haematite) iii) Al2O3.2H2O (bauxite).

Answer 1

Dear Akash,

◆ Answer -

1. Galena (PbS) by froth flotation.
2. Haematite (Fe2O3) by magnetic separation.
3. Bauxite (Al2O3.2H2O) by leaching.

● Extra information -

Ores contain several impurities which need to be removed before extracting the desired metal. This is called concentration of ores.

Various methods of ore concentration includes -

1. hand-picking
2. magnetic separation
3. gravity separation
4. chemical seperation
5. froth floatation

Hope this helps you. Thanks for asking.