... agent, filter aid.(3) In the mining, coal mining industry can be used for waste water, coal washing waste water clarifier.(4) It ... ( 20%--30% ) Wastewater treatment , papermaking , printing and dyeing , oil mining, textiles and so on2. The middle degree of ion ( 35 ... ( 20%--30% ) Wastewater treatment , papermaking , printing and dyeing , oil mining, textiles and so on2. The middle degree of ion ( 35 ...