磷石膏中水溶性磷回收实验研究  

Experimental study on recovery of water-soluble phosphorus from phosphogypsum

作　　者：李中军 邓华 池汝安 江山竹 曹本三郎 袁书珊 杨家宽[2] LI Zhongjun;DENG Hua;CHI Ru'an;JIANG Shanzhu;CAO Bensanlang;YUAN Shushan;YANG Jiakuan(Hubei Three Gorges Laboratory,Yichang 443007,China;Huazhong University of Science and Technology,Wuhan 430063,China)

机构地区：[1]湖北三峡实验,湖北宜昌443007 [2]华中科技大学,湖北武汉430063

出　　处：《磷肥与复肥》2024年第2期34-35,40,共3页Phosphate & Compound Fertilizer

基　　金：长江生态环境保护修复联合研究中心(2022-LHYJ-03-030)。

摘　　要：湿法磷酸副产磷石膏含有水溶性磷,直接堆放会造成磷资源浪费,并导致水环境污染。采用水洗和氧化钙沉淀的方式回收水溶性磷,分析用水量和温度对水溶性磷回收率的影响,研究氧化钙加入量对水洗液中磷回收率的影响。结果表明:在40℃、液固体积质量比0.7 mL/g、搅拌时间30 min、搅拌转速400 r/min条件下,水溶性磷80%以上进入水洗液中;采用氧化钙矿化水洗液,可实现水洗液中水溶性磷几乎完全沉淀。通过水洗矿化实现磷石膏中水溶性磷回收率达到80%,具有显著的经济价值。The by-product phosphogypsum of wet-process phosphoric acid contains water-soluble phosphorus.Direct stacking of phosphogypsum will cause waste of phosphorus resources and lead to water pollution.Water washing and calcium oxide precipitation method are used to recover water-soluble phosphorus,the effects of water consumption and temperature on the recovery rate of water-soluble phosphorus,and the effect of calcium oxide addition on the recovery rate of phosphorus in washing solution are studied.The results show that under the conditions of 40℃,liquid-solid ratio of 0.7 mL/g,stirring time of 30 minutes,and stirring speed of 400 r/min,more than 80%of water-soluble phosphorus enters the liquid.The water-soluble phosphorus in the washing solution can be precipitated with calcium oxide.Through water washing and mineralization,the recovery rate of water-soluble phosphorus from phosphogypsum achieves 80%,which has significant economic value.

关 键 词：磷石膏 水溶性磷 矿化 回收率 

分 类 号：X781[环境科学与工程—环境工程]