磷石膏中水溶性磷回收实验研究
Experimental study on recovery of water-soluble phosphorus from phosphogypsum
李中军 1邓华 1池汝安 1江山竹 1曹本三郎 1袁书珊 2杨家宽2
作者信息
- 1. 湖北三峡实验,湖北宜昌 443007
- 2. 华中科技大学,湖北武汉 430063
- 折叠
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0.7mUg、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.
Abstract
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Key words
phosphogypsum/water-soluble phosphorus/mineralization/recovery rate引用本文复制引用
基金项目
长江生态环境保护修复联合研究中心项目(2022-LHYJ-03-030)
出版年
2024
NETL
NSTL
万方数据