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Extraction
of sulphur by Frasch Method
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| sulphur is extracted by HERMAN FRASCH METHOD | ||||
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PRINCIPLE
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| The basic principle of Frasch Method is that sulphur is melted underground and pumped up to the surface of the earth. | ||||
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DETAILS
OF PROCESS
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SYSTEM
CONFIGURATION
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| A bore is made to the underground deposits of sulphur and three concentric pipes are sunk into the bore. | ||||
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OUTER
PIPE
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| The outer most pipe has diameter of 20 cm is sunk upto the deposits .This pipe is an inlet for super heated water. | ||||
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MIDDLE
PIPE
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| The 2nd pipe of 10 cm diameter is held a little above the surface of sulphur deposits. This pipe is outlet for molten sulphur. | ||||
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INNER
PIPE
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| The inner most pipe is used to blow hot compressed air into the deposits of sulphur. | ||||
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METHOD
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| 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. The foam of sulphur is collected in wooden tubs. After few hours, sulphur is converted into solid blocks. | ||||
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