基于针铁矿法对石棉尾矿酸浸液高效除铁  

Iron Removal from Acid Leaching Solution of Asbestos Tailings by Goethite Method

作　　者：储凌燕 孙红娟[1,2,3] 彭同江[1,2,3,4] CHU Ling-yan;SUN Hong-juan;PENG Tong-jiang(Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Institute of Mineral Materials and Applications,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Sichuan Engineering Lab of Nonmetallic Mineral Powder Modification&High-quality Utilization,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Center of Forecasting and Analysis,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China)

机构地区：[1]西南科技大学固体废物处理与资源化教育部重点实验室,四川绵阳621010 [2]西南科技大学矿物材料及应用研究所,四川绵阳621010 [3]西南科技大学四川省非金属矿粉体改性与高质化利用技术工程实验室,四川绵阳621010 [4]西南科技大学分析测试中心,四川绵阳621010

出　　处：《有色金属（冶炼部分）》2022年第11期9-16,共8页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(42072048);四川省级知识产权专项资金项目(2022-ZS-00031)。

摘　　要：石棉尾矿酸浸分离制备系列高纯硅镁化合物粉体材料是石棉尾矿高值化利用的重要途径,但石棉尾矿的酸浸液中除主要含有Mg^(2+)外,还含有如Fe^(3+)、Fe^(2+)等杂质离子。以石棉尾矿经焙烧、酸浸后的高镁酸性滤液为原料,氨水为中和剂,对滤液进行沉淀除铁,采用分光光度法测定滤液中铁离子的浓度,XRD、FT-IR等分析沉淀产物的物相结构变化。结果表明,在反应终点pH=4.5、反应温度80℃、反应时间10 min条件下,沉淀物主要由针铁矿和黄铵铁矾构成,铁的去除率可达99.71%,镁损失率仅为3.39%,悬浊液的过滤速度为3.46 mL/min,产物过滤性能好,铁离子去除率高。Acid leaching separation of asbestos tailings to prepare a series of high-purity silicon-magnesium compound powder materials is an important way of high-value utilization of asbestos tailings,but the acid leaching solution of asbestos tailings mainly contains Mg^(2+),as well as contains impurities such as Fe^(3+),Fe^(2+) and so on.The high magnesium acid filtrate after roasting and acid leaching of asbestos tailings was used as raw material,and ammonia water was used as neutralizer to precipitate iron in the filtrate.The concentration of iron ion in the filtrate was determined by spectrophotometry,the phase and structure of precipitated products were analyzed by XRD and FT-IR.The results show that under the conditions including pH value of 4.5,reaction temperature of 80℃,and reaction time of 10 min,the sediment is mainly composed of goethite and jarosite,removal rate of iron is 99.71%,loss rate of magnesium is only 3.39%,and filtration rate of suspension is 3.46 mL/min.The product filtration performance is good.

关 键 词：石棉尾矿 针铁矿法 酸浸液 除铁 过滤 

分 类 号：TF803.25[冶金工程—有色金属冶金]