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Treatment of coal washing wastewater with polyacrylamide

2023-11-28 18:29:44

Coal washing is an indispensable process of coal deep processing. Coal taken directly from a mine is called raw coal. Raw coal is mixed with many impurities in the process of mining, and the quality of coal is different. Coal with small inner ash and large inner ash are mixed together. For the treatment of coal washing wastewater, we suggest using polyacrylamide to treat coal washing wastewater.


Coal slime water is composed of coal and water, and its properties mainly include: coal slime water concentration, viscosity, ash, chemical properties and coal slime particle size. The composition of slime particle size determines the difficulty of slime water precipitation process to a large extent. With the increase of particle size and fine particle content, the Brownian motion of particles is intensified, the viscosity of coal slime water increases, the surface charge repulsion between particles is obvious, and the coal slime water has a certain colloidal property, which is difficult to be clarified naturally. The main characteristics of slime water are high concentration, fine particle size and high ash content. Most particles have a negative charge on their surface, which causes these particles to disperse continuously in water. They are affected not only by gravity, but also by Brownian motion.

Polyacrylamide manufacturer: Polyacrylamide for coal washing is a better polyacrylamide. The coal used in coal mining usually contains some impurities. Adding flotation agent can improve the separation efficiency of coal and impurities. Clean coal emerges and tail coal settles. The clean coal in the tail coal is then recovered by precipitation, filtration or centrifugation, and the polyacrylamide is used to facilitate solid-liquid separation before being sent to the concentrator. The clean water is recovered by the overflow of the concentrator, and the powdery clean coal is recovered by filtration and centrifugation. During filtration and centrifugation, polyacrylamide is added again to improve separation efficiency. In order to meet the needs of users, we provide a coal washing flocculant, which is better for different coal mines and greatly reduces the dose.

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