Question

Write short notes on following:
(i) Gangue/ Matrix
(ii) Slag
(iii) Flux.

Answer 1

(i) Gangue/ Matrix
The unwanted earthy and silicious impurities e.g. sand, clay, rock etc. associated with the ore is called gangue or matrix.
(ii) and (iii) Slag and Flux:
Flux is a substance which combines with gangue which may still be present in the calcined or roasted ore to form an easily fusible material called the slag.
$Flux+Gangue\to Slag\left(fusible\right)$.