Discussion :: Building Materials - Section 4 (Q.No.32)
| Adeel said: (Aug 31, 2020) | |
| Calcination --> heated strongly in the absence of air in order to drive out the impurities such as sulphur, arsenic, carbon dioxide and moisture. | |
| Masum said: (Oct 24, 2020) | |
| Anyone explain about roasting in heaps. | |
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