Thickener is a solid-liquid separation equipment based on gravity settling. The following is a detailed introduction to the thickener:
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Structure and composition:

Thickener is usually constructed from structural materials such as concrete, wood, or metal welded plates, and its typical feature is a cylindrical shallow groove with a conical bottom.
It mainly consists of two parts: a circular concentration tank and a rake scraper. The concentration tank is used for solid-liquid separation, while the rake scraper is responsible for continuously discharging the sediment deposited at the bottom of the tank.
Working principle:

Under the action of gravity, solid particles in the slurry will settle in the concentration tank, forming a bottom flow slurry with high solid content.
At the same time, a relatively clean clarified liquid is produced in the upper part, which overflows from the upper edge of the circular chute or concentration tank at the top.
The rake scraper operates at a slow speed (usually 1/3-1/5r/min) to discharge the thickened bottom slurry from the bottom outlet of the thickener.
Type and Application:

Thickeners can be classified into different types based on their diameter to meet the production needs of different scales.
It is widely used in production sites that require solid-liquid enrichment and separation, such as wet metallurgy, beneficiation plants, and chemical plants.
According to different transmission methods, thickeners can also be divided into two types: central transmission and peripheral transmission. The central transmission type thickener is mainly composed of a circular pool, rake, and transmission mechanism, while the peripheral transmission type is driven through a circular track.
Technological development and patents:

In recent years, with the advancement of technology and the growth of demand, thickener technology has also been constantly innovating. For example, Yunnan Hualian Zinc Indium Co., Ltd. has obtained a patent for a device to prevent foam overflow from the thickener suspension,