Which of the following statements is correct about the role of substances addedd in the froth floatation process?

Options

A. Collectors enhance the non-wettability of the mineral particles
B. Collectors enhance the wettablity of gangue particle
C. By using depressants in the process two sulphide ores can be separated.
D. Froth stabilisers decrease wettabililty of gangue

Answer

A, C

Explanation

(a,c) Froth floating process is used to extract metal from sulphide ore. This method utilise collectors and depressants whose functions are as follows
(i) Collectors enhance the non-wettability of the mineral particles.
(ii) By using depressants in the process two suphide ores can be separated e.g. , sodium cyanide is used as a depressant to separate lead ore from zinc sulphide ore.