Question

Give the principles of:

(a) hydrolytic method, (b) froth floatation,

(c) electromagnetic separation.

Answer 1

(a) Hydrolytic method: In this method, we pour the ore over a sloping, vibrating corrugated table with grooves. A jet of water is allowed to flow over the surface. The denser ore particles settle in the grooves, and the impurities are washed away by water.

(b) Forth floatation: Froth flotation is a process for selectively separating hydrophobic materials from hydrophilic. This process depends on the preferential wettability of the ore with oil and the gangue particles by water.

(c) Electromagnetic separation: Separating the magnetic impurities from the non-magnetic ore particles by using the magnetic properties of the ores.