酸碱协同从钢渣中分离回收钙硅试验研究  

Separation and Recovery of Calcium and Silicon from Steel Slag by Acid-base Synergistic Separation Method

作　　者：王家凤 方佑东 姜晓媛 朱隆琦 苏畅 吕宁宁 WANG Jiafeng;FANG Youdong;JIANG Xiaoyuan;ZHU Longqi;SU Chang;LYU Ningning(School of Metallurgical Engineering,Anhui University of Technology,Maanshan 243032,China)

机构地区：[1]安徽工业大学冶金工程学院,安徽马鞍山243032

出　　处：《湿法冶金》2025年第1期52-58,共7页Hydrometallurgy of China

基　　金：国家自然科学基金资助项目(52074004)。

摘　　要：研究了采用酸碱协同分离法回收钢渣中的钙、硅元素,考察了浸出剂浓度、温度、浸出时间及液固体积质量比对钙、硅元素浸出率的影响,探究了其在不同浸出条件下的浸出规律。结果表明:浸出剂浓度、浸出时间、液固体积质量比对钙、硅元素浸出率有较大的影响,而温度对钙、硅元素的浸出率影响不明显;在盐酸浓度0.75 mol/L、浸出时间30 min、温度25℃及液固体积质量比10∶1条件下,钙浸出率为53.74%,所制得的草酸钙纯度可达98.94%;在氢氧化钠浓度1.5 mol/L、温度95℃、浸出时间120 min及液固体积质量比20∶1条件下,二氧化硅浸出率为43.22%,所制得二氧化硅纯度可达80.85%。该法能有效分离回收钢渣中钙、硅元素,实现资源化利用。The recovery of calcium and silicon from steel slag by acid-base synergistic separation method was studied.The effects of leaching agent concentration,temperature,leaching time and liquid volume to solid mass ratio on the leaching rate of calcium and silicon in steel slag were investigated.The leaching rules under different leaching conditions were investigated.The results show that the leaching concentration,time,and liquid volume to solid mass ratio significantly influence the leaching rate of calcium and silicon,and temperature has no significant effect.Under the conditions of hydrochloric acid concentration of 0.75 mol/L,leaching time of 30 min,temperature of 25℃,and liquid volume to solid mass ratio of 10∶1,the calcium leaching rate is 53.74%,and the resulting calcium oxalate purity can reach 98.94%.Under the conditions of sodium hydroxide concentration of 1.5 mol/L,temperature of 95℃,leaching time of 120 min,and liquid volume to solid mass ratio of 20∶1,the silicon dioxide leaching rate is 43.22%,and the purity of the resulting silicon dioxide can reach 80.85%.The method can effectively separate and recover calcium and silicon from steel slag,and realize resource utilization.

关 键 词：钢渣 有价元素 酸碱协同 浸出 钙 硅 分离 回收 

分 类 号：TF803.21[冶金工程—有色金属冶金]