The Thickening Tank is widely used in the processing of […]
The Thickening Tank is widely used in the processing of fine coal slime in coal preparation plants. With the increase in coal washing in recent years, the large-scale production of coal preparation plants has become a development trend. At present, the production scale of most coking coal preparation plants has reached 6.0Mt/a, and the processing capacity of some thermal coal preparation plants has reached 20.0M/a. The increase in production scale will inevitably lead to an increase in the pressure of slime water treatment.
At the same time, due to the improvement of mechanization of coal mining and the decline of coal quality, the effect of high-ash fine mud on coal washing is becoming more and more prominent, which requires that the high-ash fine particles contained in the recycled coal water should be as small as possible. To reduce the impact of high ash and fines in the reuse of water on coal washing. Therefore, higher requirements have been put forward for the thickening tank for coal slime water treatment in coal preparation plants.
The shovel thickening tank can be divided into two categories: peripheral transmission and center transmission. When the thickening tank is working, the material is fed into the central receiving cylinder from the feeding chute, and the slime water is radiated from the central receiving cylinder to the surrounding area. The solid particles in the slime water gradually concentrate and settle to the bottom, and are scraped by the slow running scraper. In the conical discharge hopper at the center of the bottom of the tank, the angle of the conical discharge hopper is generally 6°-12°, and then discharged by a sand pump. An annular overflow tank is arranged around the upper part of the tank body, and the clarified water is discharged from the annular overflow tank over the overflow weir.