The thickener is to  improve the pulp concentration,make the production process to obtain  suitable concentration.Generally divided into two kinds,peripheral  transmission and center transmission,commonly used in the ore dressing plant concentrate,middling and tailings.It is widely used in metallurgy,chemical and other industries such as coal,environmental protection.

The industrial thickener consists of a cylindrical basin filled with water, the contents of which are completely purified with the help of sedimentation or solid separation from the liquid. The working method of the thickener is that after entering the industrial wastewater into the tank and reducing its turbulence, part of the solid water particles are exposed to various forces such as gravity and centrifugal force due to the difference in weight and the movement of the thickener paddles and settle at the bottom of the pond. After the formation of the thick paste (Underflow) in the lower part of the thickener tank, it is time to leave the clear liquid formed on the water, which is called the thickener head or Overflow, which takes place through the channel in the upper part of the pond. In the last stage of the thickener method, the sediments deposited in the end section are sent to the central duct of the thickener with the help of one or more rotating arms and are thus removed.