When mineral substances are wet conditioned, the "washwater" is circulated. The "water loss" resulting from the moisture remaining in the created product is replaced with fresh water.
The finest particles suspended in the washwater are compressed by sedimentation in so-called round gravity thickeners. The particle-free clear water is recovered from the overflow and returned to the water circulation system.
The size of the thickeners is a factor of the fed quantity and the speed at which the solid matter sediments. How settles rate can be influenced by the amount of flocculants added.
A rabble rake device in the center of the thickeners rotates slowly to prevent the solid matter from clumping together. The rabble arms create channels in the compression zone. Water is released and escapes to the clear liqued zone.
MAB thickeners are made of steel. They are freestanding and the inner surface is coated.