Question

write a short note on each of the following
i)roasting
ii) calcination
iii) smelting

Answer 1

i) Roasting refers to a process by which an ore, mainly sulphide,is heated in the presence of air to make it into an oxide ore.

ii) Calcination refers to a process by which an ore, mainly carbonate and hydroxide,is heated in theabsence of air to make it into an oxide ore.

Answer 2

Answer:

roasting pyrochemical process in which the the ore is heated in the presence of oxygen

calcination is a pyrochemical process in which the the ore is heated in the absence of air

smelting is a process of applying heat or in order to extract a base metal

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