write 3 points of difference between calcination and roasting
Answers
The IUPAC defines calcination as "heating to high temperatures in air or oxygen". However, calcination is also used to mean a thermal treatment process in the absence or limited supply of air or oxygen applied to ores and other solid materials to bring about a thermal decomposition of an object
roasting
Roasting is a process of heating of sulfide ore to a high temperature in presence of air. It is a step of the processing of certain ores. More specifically, roasting is a metallurgical process involving gas–solid reactions at elevated temperatures with the goal of purifying the metal object
Answer:
Calcination-It is the process of converting an ore into its oxide by heating strongly in absence of air.
2.it is volatile impurities.
3.are also removed
Roasting- It is the process of converting an ore into its oxide by heating strongly in excess of air.
2.It is non metallic impurities.
3.It is removed as volatile gases