Sometimes called inorganic flocculant inorganic coagulants. Is composed of inorganic components of flocculants, flocculant is mainly increase the collision mixture solidified body, make its hydrolysate agglomeration, bridging flocculation formation can be settlement of floc or filtering. In the water supply that is commonly used in wastewater treatment such as aluminum salt, ferric salt and calcium chloride, such as potassium aluminium sulfate (alum), aluminium chloride, ferric sulfate and ferric chloride; And inorganic polymer flocculants, such as polyaluminium chloride, aluminium sulphate, activated silica polymerization, etc. They have a variety of specifications of industrial products. General with aluminum salt flocculants in the water treatment 10-5-10-3 mol/L.

    In different pH, different hydrolysis, complex products. PH value is lower, to produce a low charge and high degree of polymerization of inorganic polymer electrolyte is given priority to. In addition, the water temperature is high, also is advantageous to the flocculation. Aluminum sulfate can be used in papermaking, textile, laundry plant, containing colloidal clay sand washing and thermal power plant coal wastewater treatment; Calcium chloride is often used in textile, washing and washing wool, sand washing, such as waste water, is very effective to grease.

    Active silica can handle a variety of industrial waste water, such as oil field waste water, coal washing water and paper mill wastewater. Polyaluminium chloride and polymeric aluminum sulfate and polyelectrolyte flocculation agent (or coagulant) is to put the aluminium salt control under the appropriate conditions, made can achieve the optimal expected effect of flocculation agents. It can play a role of flocculation immediately after put into the water, so they are better than general of aluminum salt flocculants (or coagulant) efficiency is good, strong adaptability, is becoming more and more widely used, such as industrial wastewater treatment, etc.