Question

Give a brief account of the extraction of sulphur.

Answer 1

1. Sulphur deposits lie deep underground, covered by rocks and poisonous gases.
2. A large pipe casing is inserted down to the sulphur bed.
3. Superheated water (445-455 K) is pumped through the outer pipe to melt the sulphur.
4. Compressed air is sent through the inner pipe to push the molten sulphur upward.
5. The molten sulphur is forced out to the surface as an emulsion and collected.
6. This method avoids traditional mining difficulties and recovers pure sulphur economically.