Question

Calcination is the process in which:

• A. ore is heated above its melting point to expel $H_{2}O$ or $C{O}_2$ or $S{O}_2$
• B. ore is heated below its melting point to expel volatile impurities
• C. ore is heated above its melting point to remove $S,As$ and $Sb$ as $S{O}_2$, $A{s}_2{O}_3$ and $S{b}_2{O}_3$ respectively
• D. ore is heated below its melting point to expel $H_{2}O$ or $C{O}_2$

Answer 1

Answer: (D)

Calcination is a process of heating a substance to a high temperature but below the melting or fusion point, causing loss of moisture, reduction or oxidation and dissociation into simpler substances.