Extraction of Sulphur - Frasch Process


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Principle

Sulphur has a low melting point of about 112oC - 115oC

Process

Frasch Process

Mining of Sulphur - Frasch Process

  • A Frasch pump consisting of a set of three concentric pipes is sunk deep into the sulphur bed
  • Super heated water at 1700C under pressure is pumped in through the outermost pipe
  • Sulphur in the sulphur bed melts due to its contact with hot water
  • Compressed air is pumped in through the inner most pipe
  • Molten sulphur mixed with water oozes out under pressure through the middle pipe
  • This molten sulphur is cooled and the water is allowed to evaporate
  • This produces 99.5% pure sulphur.

Note:-

> Super heated water melts sulphur

>Compressed air forces molten sulpher out of the sulpher bed



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