生物质灰渣改质钢渣促进磷元素浸出的研究  

Study of Biomass Ash Modified Steel Slag to PromotePhosphorus Leaching

作　　者：朱隆琦 吴建 方赋君 方佑东 苏畅 吕宁宁 ZHU Longqi;WU Jian;FANG Fujun;FANG Youdong;SU Chang;LV Ningning(College of Metallurgical Engineering,Anhui University of Technology,Maanshan 243032,China;Key Laboratory of Metallurgical Emission Reduction and Comprehensive Utilization of Resources,Ministry of Education,China,Maanshan 243002,China)

机构地区：[1]安徽工业大学冶金工程学院,安徽马鞍山243032 [2]冶金减排与资源综合利用教育部重点实验室,安徽马鞍山243002

出　　处：《绿色矿冶》2025年第1期9-17,共9页Sustainable Mining and Metallurgy

基　　金：国家自然科学基金(52074004);安徽省高校自然科学研究重点项目(KJ2021A0357)。

摘　　要：钢渣含有大量的有价元素,其中的磷被认为是最具有回收价值的元素之一,高效回收钢渣中的磷至关重要。本文利用生物灰渣对钢渣进行改质处理,并选用盐酸作为浸出剂,研究改质钢渣的浸出规律。结果表明,经过生物质灰渣改质后,熔融状态下钢渣中Ca_(3)P_(2)O_8、K_(4)CaP_(2)O_8的活度升高,Ca_(3)SiO_(5)、Ca_(2)SiO_(4)的活度降低,从而促进了含磷固溶体的形成;改质钢渣中含磷固溶体相的晶型发生改变,提高了固溶体的溶出率;改质处理对镁铁相的影响较小;当生物质灰渣添加量为20%时,在浓度0.07 mol/L的盐酸溶液中,钢渣的磷浸出率可从改质前的39.91%提高到61.12%,铁浸出率仅为23.86%。Steel slag contains a large number of valuable elements,among which phosphorus is considered to be one of the most valuable elements.It is very important to recover phosphorus in steel slag efficiently.In this paper,the steel slag was modified by biological ash,and hydrochloric acid was used as leaching agent to study the leaching law of modified steel slag.The results show that the activities ofCa_(3)P_(2)O_8 and K_(4)CaP_(2)O_8 in the molten steel slag increase,and the activities of Ca_(3)SiO_(5) and Ca_(2)SiO_(4) decrease after biomass ash modification,which promote the formation of phosphorus-containing solid solution.The crystal form of the phosphorus-containing solid solution phase in the modified steel slag changes,which increases the dissolution rate of the solid solution.The modification treatment has little effect on the Mg-Fe phase;when the addition amount of biomass ash is 20%,the phosphorus leaching rate of steel slag can be increased from 39.91%to 61.12%in 0.07 mol/L hydrochloric acid solution,and the iron leaching rate is only 23.86%.

关 键 词：钢渣 改质 浸出 磷 盐酸 

分 类 号：X757[环境科学与工程—环境工程]