Building Materials - Engineering
Q1: Calcination of iron ores is doneA
to remove moisture
B
to remove carbonic acid
C
by roasting in heaps
D
after dressing
E
all the above.
ANS:E - all the above. Calcination --> heated strongly in the absence of air in order to drive out the impurities such as sulphur, arsenic, carbon dioxide and moisture. |
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