Question

Which technique utilizes the density difference between the ore and the impurity to concentrate the ore is:

Options

• Hydraulic washing

• Froth floatation

• Magnetic separation

• Leaching

Answer 1

Hydraulic washing

Explanation:

This is based on the differences in gravities of the ore and the gangue particles. It is therefore a type of gravity separation. In one such process, an upward stream of running water is used to wash the powdered ore. The lighter gangue particles are washed away and the heavier ores are left behind.