Please wait...
1800-212-7858 (Toll Free)
9:00am - 8:00pm IST all days


Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this toll free number


Mon to Sat - 11 AM to 8 PM

Junior - VI - Chemistry

please explain extraction of metals through roasting and calcination, and refining of metals.

Asked by sunil2791 7th September 2015, 7:00 PM
Answered by Expert


Hi Sunil,

Concentrated ore is converted into metal oxide either by Roasting or Calcination.


Process of heating the concentrated ore to a high temperature in the presence of excess air.



Process of heating the concentrated ore in the absence of air at a temperature not sufficient to melt the ore.

Refining of Impure Metal

  1. Distillation refining: For refining volatile metals, e.g. zinc, mercury.
  2. Liquation: For refining metals with low melting points, e.g. lead, tin.
  3. Oxidation refining: For refining metals by oxidation of their impurities, e.g. iron.
  4. Electrolytic refining: For refining impure metals by electrolysis, e.g. Cu, Al, Pb.


Answered by Expert 7th September 2015, 7:05 PM

Rate this answer

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer /10

Report an issue
Your answer has been posted successfully!