In the treatment of steel mill wastewater polychlorinated aluminum plant manufacturers to provide the best technology ratio in the treatment of steel mill wastewater polychlorinated aluminum plant manufacturers to provide the best process ratio method in the treatment of steel mill wastewater, Sewage filtration, removal of larger impurities. The composition of the filter media and the filter media layer is the key to determine the performance of the filter device. The quality of the filtered water determines the normal process of the subsequent treatment process. Therefore, the development of filtration technology depends very much on the rationality and high efficiency of the filter and filter media. Polyaluminum chloride plant manufacturers according to the characteristics of "the right medicine" significantly improve the water purification effect. Steel mill wastewater is generally blast furnace gas scrubbing water and slag effluent, wastewater temperature is high, the concentration of suspended matter can be as high as 1000 ~ 3000 mg / l. Polyaluminum chloride plant manufacturers based on years of experience in water treatment, according to steel mill wastewater containing iron oxide scale about 5000mg / L, suspended solids 100-1250 mg / L, residue 800-1500 mg / L, oil 50-500 mg / L The actual situation. After the wastewater is effectively coagulated and precipitated by polyaluminum chloride to remove suspended matter and oil pollution, it is cooled and recycled to be used for production. Polyaluminum chloride in general is due to the bridging effect of hydroxide ions and the polymerization of polyvalent anions produced higher molecular weight, higher charge of inorganic polymer water treatment agent. Polyaluminium chloride in the treatment of steel plant wastewater best dosage method: according to polyaluminum chloride solid: water = 1: 9 to 1:15 weight ratio of mixing can dissolve. Solutions containing less than 1% alumina are more susceptible to hydrolysis and will reduce their effectiveness. Too much polyaluminum chloride solution will cause the solution and the effluent to mix together to maximize effectiveness.