Causes Of Impeller Abrasion Of Slurry Pump In Coal Washing Plant

Date: 2023-01-05     From: Longding     Author: admin

During the coal-washing process of the coal washing plant, slurry pumps are required for slurry transportation at every link. The impeller is the core part of the slurry pump, and the impeller directly determines the performance parameters of the slurry pump. The wear of the impeller affects the flow characteristics in the pump and shortens the actual service life of the pump.

Impeller parameters of slurry pump

1. The impeller parameters of the slurry pump will affect the wear of the impeller and determine the performance of the slurry pump. Therefore, the selection of impeller parameters is very important.

2. The impeller inlet angle and outlet angle have a great influence on impeller wear.

Impeller speed of the slurry pump

1. The speed will affect the wear of the impeller in the slurry pump. As the impeller speed increases, the particles in the slurry pump will gain greater kinetic energy, which will aggravate the wear of the impeller in the slurry pump.

2. The main solid components in the slurry pump are gangue, coal powder, sand, clay, shale and other solid-liquid mixtures that are relatively abrasive and contain hard solid particles. The mass concentration is generally around 15% to 20%.

3. In the case of high speed, the more solid particles and impurities, the greater the load of the slurry pump, and the more serious the wear of the impeller.

4. Generally, it is not recommended to choose a high-speed slurry pump. The selection and design of the slurry pump should follow the principle of low-speed priority.

Slurry properties

During the coal-washing process, organic polymer flocculants such as polyacrylamide will be added. When the suspension contains a high percentage of colloids, divalent or trivalent metal salts must be added to destabilize the colloidal particles. This will result in a low pH value of the slurry, making the slurry acidic. When the metal surface of the worn impeller is in an acidic state, the corrosion process of the impeller will be aggravated, and the corrosion of the impeller will aggravate the wear of the impeller. The particle size has the greatest impact on the life of the slurry pump, so the particle size of the slurry should be reduced as much as possible.