Principles and Processes of Extraction (Metallurgy)


 

Principles and Processes of Extraction (Metallurgy) logoSubject: Chemistry    Exam: CET

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Important Points

Flux is used to fuse non-fusible impurities present in ore.
Poling is used for purification of metal which contains their own oxide as impurity e.g. Cu2O in Cu.
Lapis lazuli is the aluminium silicate present in earth rocks as blue stone.
Cupellation method is used when the impure metals contain impurity of another metal which forms volatile oxide.
Roasting is the process of heating the ore strongly in the presence of excess of air. It is generally carried in reverberatory or blast furnace.
 
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