Question

Write short notes with example:
(i) Pyrometallurgy
(ii) Electrometallurgy
(iii) Hydrometallurgy

Answer 1

Explanation:

1. Pyrometallurgy is a branch of extractive metallurgy. It consists of the thermal treatment of minerals and metallurgical ores and concentrates to bring about physical and chemical transformations in the materials to enable recovery of valuable metals. 2.Electrometallurgy is a method that uses electrical energy to produce metals by electrolysis.Electrometallurgy is usually the last stage in metal production and is therefore preceded by pyrometallurgical or hydrometallurgical operations. 3. Hydrometallurgy is a method for obtaining metals from their ores. It is a technique within the field of extractive metallurgy involving the use of aqueous chemistry for the recovery of metals from ores, concentrates, and recycled or residual materials.

Answer 2

Answer:

(1) Pyrometallurgy: It is a process of extraction of metal from metal oxide Irom concentrated ore by reduction with suitable reducing agent like carbon, hydrogen, aluminium, etc. at high temperature.

(2) Hydrometallurgy: It is a process of extraction of metals by converting their ores into aqueous solutions of metal them by suitable reducing agents and reduCing compounds

3) Electrometallurgy: it is the a process of extraction of highly electropositive metals like Na, K, Al, etc. by electrolysis metals where metal ions are reduced at cathode forming metals.