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Flotation is a method of separation that relies on the property of density. Substances that are dense are heavy and will sink to the bottom when placed in a liquid that is not as dense. We have seen this in the process of sedimentation.
Flotation is a method of separation that relies on the property of density. Substances that are dense are heavy and will sink to the bottom when placed in a liquid that is not as dense. We have seen this in the process of sedimentation.
If the substance placed into the liquid is less dense, such as polystyrene balls, foam, or cork it will float on the surface. This is called flotation.
If the substance placed into the liquid is less dense, such as polystyrene balls, foam, or cork it will float on the surface. This is called flotation.
Froth flotation is used in the mining industry to separate valuable minerals from waste rock. Chemicals are added to the mixture which bind to the minerals. When air is pumped through the mixture, the chemicals and minerals form bubbles which float to the surface and can be easily collected.
Froth flotation is used in the mining industry to separate valuable minerals from waste rock. Chemicals are added to the mixture which bind to the minerals. When air is pumped through the mixture, the chemicals and minerals form bubbles which float to the surface and can be easily collected.
Froth flotation is also used in sewage treatment plants.
Froth flotation is also used in sewage treatment plants.
Figure 1: Froth flotation in a mineral processing plant.
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