Application of Slurry Pumps in Coal Washing

The specific applications of slurry pumps in the coal washing process are as follows:

• Combined medium pump: Pump the medium suspension with specified density in the combined medium barrel into the tank of the shallow-tank heavy medium separator for dressing raw coal.
• Dilute medium pump: Pump the dilute medium suspension in the dilute medium tank into the magnetic separator for magnetic separation; the concentrate (medium) after magnetic separation is recovered to the combined medium tank.
• Cyclone feed pump: Pump the coal slime water in the slime hopper into the coal slime concentrating cyclone for separation.
• Sump pump: Pump surface water into the diluent barrel.
• Circulating water pump: Pump the clarified water in the concentration tank into the washing system, which is used for medium removal spraying of the medium removal screen and system water replenishment.
• Underflow pump: Pump the concentrated high-concentration coal slime water in the concentration tank into the coal slime mixing tank of the washing water system.
• Filter press feed pump: Pump the high-concentration coal slime water in the coal slime mixing tank into the filter press to achieve the separation of coal slime and water.
• Filtrate pump: The filtrate after filter press treatment is recovered into the filtrate tank, and then pumped into the concentration pond by the filtrate pump.

The commonly used slurry pumps in coal washing plants are horizontal axial suction single-stage single-suction centrifugal slurry pumps and vertical axial suction single-stage single-suction slurry pumps.