GENERAL KNOWLEDGE

Detailed explanation-1: -Levigation is based on the difference in densities of the metallic ore and gangue particles. Powdered ore is treated with a stream of running water when the lighter gangue particles are washed away and heavier ore particles are left behind.

Detailed explanation-2: -Levigation is generally employed for concentration of sulphide ores. Oxide ore are purified by levigation process. Nature of some ores are given.

Detailed explanation-3: -Levigation is a method of concentrating ore that makes use of the difference in density between ore and impurities. In this process, the ore is treated with steam and gangue particles are washed away.

Detailed explanation-4: -Gravity separation is also called levigation or hydraulic washing. Here, the lighter gangue particles are removed from heavier ore particles by washing in a water current. It is mainly used for oxide ores and carbonate ores based on their difference in densities of the ore particles and impurities.