Question

26.a. Differentiate between roasting and calcinations​

Answer 1

Answer:

Here are some of the major differences between calcination and roasting. Roasting involves heating of ore lower than its melting point in the presence of air or oxygen. ... During calcination, moisture is driven out from an ore. Roasting does not involve dehydrating an ore.

Explanation:

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Answer 2

differences between calcination and roasting.

Calcination

• Calcination is a process in which ore is heated in the absence of air or air might be supplied in limited quantity
• Calcination involves thermal decomposition of carbonate ores.
• During calcination, moisture is driven out from an ore.
• Carbon dioxide is given out during calcination

Roasting

• Roasting involves heating of ore lower than its melting point in the presence of air or oxygen.
• Roasting is carried out mostly for sulfide minerals.
• Roasting does not involve dehydrating an ore.
• During roasting large amount of toxic, metallic and acidic compounds are released.