Question

explain rosin and calcination​

Answer 1

Answer:

Sintering is a process of compacting material using both pressure and relatively high temperature which is usually bellow the melting temperature. Calcination is a thermal treatment of solids which aims to heat the material at very high temperature in the absence of air or oxygen (or at least under no gas flow).

Answer 2

Hlo mate

Here's your answer

Roasting is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities. ... 

Calcination is the process of heating the ore below its melting point an absence of air to remove volatile impurities like arsenic etc.