Question

what is difference between roasting and calcination​

Answer 1

Answer:

Calcination is the process of heating the ore below its melting point in absence of air to remove volatile impurities like arsenic etc. Roasting is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities.

Explanation:

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Answer 2

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roasting:)

1. roasting is the heating of a metal ore in the presence of excess air or oxygen
2. requires an excees amount of air or oxygen
3. mainly done for sulphide ores
4. releases toxic gases and substance.

calcination:)

1. calcination is the heating of metal ore in the presence of limited air or oxygen
2. done at limited air or oxygen
3. done for carbonate ores
4. relaese toxic volatile compounds.

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