Question

Write the chemical reaction taking place in extraction of zn from zinc blende how it is purified

Answer 1

1) Concentration of ore First, the gangue from zinc blende is removed by the froth floatation method.

 

(ii) Conversion to oxide (Roasting) Sulphide ore is converted into oxide by the process of roasting. In this process, ZnS is heated in a regular supply of air in a furnace at a temperature, which is below the melting point of Zn.

iii) Extraction of zinc from zinc oxide (Reduction) Zinc is extracted from zinc oxide by the process of reduction. The reduction of zinc oxide is carried out by mixing it with powdered coke and then, heating it at 673 K