湿法冶金2024，Vol.43Issue(2)：140-146,7.DOI:10.13355/j.cnki.sfyj.2024.02.005
脱磷渣中有价元素在不同有机酸溶液中的浸出行为
Dissolution Behavior of Valuable Elements from Dephosphorization Slag in Different Kinds of Organic Acids
摘要
Abstract
Dephosphorization slag contains a large amount of valuable components such as CaO,SiO2,FeO,P2O5,etc.,and has the potential to be used as soil amendment and fertilizer.To promote utilization of dephosphorization slag in agriculture,it is necessary to understand its dissolution behavior in the organic acid solution.The influence of pH and organic acid type on the dissolution ratios of various valuable elements from dephosphorization slag was investigated.The results show that the main mineral phases in the dephosphorization slag are RO phase,CaFeSiO4 matrix phase,and C2S-C3P solid solution.Ca and Si elements in the slag are mainly distributed in the C2 S-C3 P solid solution and CaFeSiO4 matrix phase,while the P element is enriched in the C2S-C3P solid solution.Fe element is mainly distributed in the RO phase.As the pH value decreased,the dissolution of slag is significantly promoted,and most of the dephosphorization slag can be dissolved in the citric acid solution.At pH=5,the dissolution ratios of Ca,Si,Mg elements are about 90％,and the P dissolution ratio is 68.84％,achieving the dissolution of valuable elements.关键词
脱磷渣/土壤改良剂/有价元素/浸出/有机酸Key words
dephosphorization slag/soil amendment/valuable elements/leaching/organic acid分类
矿业与冶金引用本文复制引用
蒋佳霖,李尚兵,王鑫,杜传明..脱磷渣中有价元素在不同有机酸溶液中的浸出行为[J].湿法冶金,2024,43(2):140-146,7.基金项目
国家自然科学基金资助项目(52104326) （52104326）
中国博士后科学基金资助项目(2022M721415). （2022M721415）
