1 July 2022

Concentration | Production of Metal

Concentration

Ore concentration

Also called ore dressing, the aim is to increase the amount of metal in each tonne of ore. The ore is crushed then ground and concentrated,

The following methods may be used:

  1. Gravity concentration

  2. Flotation

  3. Magnetic separation

  4.  Amalgamation

Gravity concentration

  • Some ores are heavier than the waste. The ore is shaken by a jolting box, or similar, while wet.
  • Particles will separate into layers depending on weight, the metal may be removed as a layer.

Flotation

 

Magnetic separation

 

 

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