Extraction of sulphur by Frasch Method | |||
sulphur is extracted by HERMAN FRASCH METHOD | |||
PRINCIPLE | |||
The basic principle of Frasch Method is that sulphur is melted underground and pumped up to the surface of the earth. | |||
DETAILS OF PROCESS | |||
SYSTEM CONFIGURATION | |||
A bore is made to the underground deposits of sulphur and three concentric pipes are sunk into the bore. | |||
OUTER PIPE | |||
The outer most pipe has diameter of 20 cm is sunk upto the deposits .This pipe is an inlet for super heated water. | |||
MIDDLE PIPE | |||
The 2nd pipe of 10 cm diameter is held a little above the surface of sulphur deposits. This pipe is outlet for molten sulphur. | |||
INNER PIPE | |||
The inner most pipe is used to blow hot compressed air into the deposits of sulphur.
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METHOD | |||
Superheated steam at 170oC under 16 atmp is pumped down the outer most pipe . Since melting point of sulphur is 113oC , it is melted and collects at the bottom. Hot compressed air is blown down the inner most pipe to produce foam of molten sulphur . This foam rises through the annular space between the inner most pipe and the next |
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