磷石膏无害化预处理与污染物控制技术研究OACHSSCD

In order to solve the environmental pollution caused by the storage of phosphogypsum and address the safety hazards in the goaf of Weng'an phosphate mine,an integrated system of phosphogypsum harmless disposal and pollution control is constructed by combining phosphogypsum harmless pretreatment and pollutant control technology.According to laboratory testing,the particle size uniformity of pre treated phosphogypsum exceeds 85%,the leaching concentration of pollutants is reduced by at least 55%,and the compressive strength of the filling material remains stable at 1.5 MPa or above after 28 d.On-site application testing shows that pollutant emissions meet relevant standards,and the water resource reuse rate exceeds 80%.