氟硅酸钠及湿法磷酸生产污水在稀磷酸生产中的应用  

Application of sodium fluosilicate and WPA production sewage on production of dilute phosphoric acid

作　　者：朱飞武 吴有丽 项双龙 

机构地区：[1]贵州开磷集团股份有限公司,贵州贵阳551109

出　　处：《磷肥与复肥》2018年第1期36-37,共2页Phosphate & Compound Fertilizer

基　　金：贵州省科技计划项目(黔科合支撑[2016]2313)

摘　　要：将浓密机沉降后w(H_2O)33%的磷矿浆脱水处理至w(H_2O)13%,之后用氟硅酸钠及湿法磷酸生产污水将磷矿浆重新调浆至w(H_2O)33%,经预混反应后用于稀磷酸生产。该技术直接减少磨矿装置新鲜工业水消耗量164 m^3/h,消耗氟硅酸钠及湿法磷酸生产污水111.02 m^3/h,提高了磷矿转化率及洗涤率,磷石膏残磷值降低约0.2%。After the sedimentation of the thickener, the water content of phosphate rock slurry is reduced to 33%, the phosphate rock slurry with water content of 33% is dehydrated to the water content of 13%, and then diluted with sodium fluosilieate and WPA production sewage to water content of 33% again. The pre-reacted phosphate rock slurry is used to produce dilute phosphoric acid. With the technology, the fresh water consumption of grinding equipment is reduced by 164 m3/h, the sodium fluosilicate and WPA production sewage of 111.02 m3/h is consumed, the conversion rate and washing rate of phosphate rock are effectively improved, the phosphorus content of phosphogypsum is reduced by about 0.2%.

关 键 词：湿法磷酸 氟硅酸钠 生产污水 磷矿浆 萃取反应 预混反应 

分 类 号：X781[环境科学与工程—环境工程]