Question

When do we use magnetic separation method for concentration of an ore? Explain with an example?

Answer 1

Removal of unwanted materials (examples- sand, clays, etc.) from the ore is known as concentration.

Concentration can be done in different ways based on ores.

$1.$ Hydraulic Washing

$2.$ Magnetic Separation

$3.$ Froth floatation method

$4.$ Leaching

Magnetic separation- This is based on difference in magnetic properties of ore components . If either of the ore or the gangue (one of these two) is capable of being attracted by a magnetic field, then such separations are carried out.

For example- In case of iron ores like Magnetic $\left(F{e}_3{O}_4\right)$ or Haematite $\left(F{e}_2{O}_3\right)$.