Roasting of metallurgical ores is done mainly to ___________________?
Correct answer: C. Remove arsenic & sulphur
- A. Dehydrate it
- B. Sinter the ore
- C. Remove arsenic & sulphur
- D. Remove CO2 & H2O
Explanation
Roasting heats an ore in excess air, oxidising sulphides and volatile impurities such as sulphur and arsenic. Dehydration is associated mainly with calcination, while sintering agglomerates ore particles.
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