Poly ferric sulfate produced by Baoyuan is a kind of inorganic polymer water purification coagulant with superior performance, which is widely used in the purification of drinking water, industrial water, various industrial wastewater, urban sewage, sludge dewatering, etc.

PFS can be neutralized and destabilized in medium voltage in coal washing wastewater. On the contrary to the existence of a large number of negatively charged suspended particles in the wastewater, a large number of colloidal substances with positive charges, such as trivalent iron ions, ferric hydroxide and polynuclear complexes, will be generated after the dissolution of polymerized iron, which can carry out electric neutralization in the coal washing wastewater, compress the double electric layer of colloidal suspended particles in the hydrolysis complexation, destabilize the suspended particles, form small flocs, and form collision and adhesion in Brownian motion Larger particles.

The specific surface area of ferric hydroxide and polynuclear complex colloid formed by dissolving polyferric sulfate in water is large. In addition to neutralization with suspended particles, it can also adsorb and agglomerate a large amount of suspended solids in water to form large and dense alum particles to precipitate at the bottom of water, which can be separated by solid-liquid separation and remove turbidity from coal washing wastewater.