9. Which substance is obtained as a slag during extraction of copper?
(A) FeSiO3 (C) Na3PO4
(B) CaSiO3
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12th
Chemistry
General Principles and Processes of Isolation of Elements
Thermodynamic Principles of Metallurgy
The slag obtained during th...
CHEMISTRY
The slag obtained during the extraction of copper pyrites is composed mainly of FeSiO3.
A
True
B
False
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Copper is mainly extracted from copper pyrites. After the concentration of its ore by froth flotation process, the ore is roasted in a current of air to remove arsenic, antimony and much of sulphur.
The ore is then mixed with a little coke and sand and smelted in a water-jacketed blast furnace. The minor reactions that occured during roasting continue here. Ferrous oxide combines with sand to form a fusible slag.
FeO+SiO2→FeSiO3 slag
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