Hydrocyclone is a divece which forces fluid to rotate inside working chamber by uitlizing fluid pressure as power. It has functions to desliming and thickening various kinds of slurry, it also can classify and separate different size particles. Hydrocyclone is widely used for many industries, especially in mineral processing.
The inwall of hydrocyclone is cone cylinder. When slurry is motived by pressure and feed into hydrocyclone with a certain speed, since the shape of cone cylinder, it is forced to form rotary motion and bring centrifugal effect to particles in slurry. Since particles have different sizes and weights, they have different centrifugal force and gravity.
Feed pipe of hydrocyclone feeds slurry continually to maintain running condition inside the cylinder. Under the impact of the centrifugal force, coarse particles in slurry overcome the resistance from water and draw close to cylinder wall. Meanwhile, under the impact of gravity from themselves, they move towards the bottom of hydrocyclone continually. The fine particles are on the contrary.
Fine particles in hydrocyclone under smaller impact of centrifugal force and gravity, these two force is smaller than the resistance from water. So, fine particles will rest on the middle part of hydrocyclone. Particles inside the hydrocyclone are compart array, from middle to circum, particles arrange from small to large.
Slurry inside the hydrocyclone move slowly from cylinder to cone cylinder, the flow fracture surface reduces continually, outer layer of slurry stresses inlayer of slurry harder and harder steadily, a large number of fine particles inlayer will be forced to change move direction, overcome their gravity to move upward and form internal swirl. Finally they will be discharged from overflow pipe.
Outer layer of slurry has more coarse particles. They have bigger gravity and stress, they will move downward spirally along the inwall of cylinder and form outer vortex. Finally, they will reach the bottom of hydrocyclone and be discharged from the spit as sand settlings.