钒钛磁铁矿尾矿中钪的直接酸浸试验研究  

Experimental Study on Direct Acid Leaching of Scandium from V-Ti Magnetite Tailings

作　　者：梁效 牛芳银 王勇海 郭彩莲[1,2] 郭月琴 LIANG Xiao;NIU Fang-yin;WANG Yong-hai;GUO Cai-lian;GUO Yue-qin(Engineering&Technology Center for Comprehensive Utilization of Mineral Resourcein Shaanxi Province,Xi'an 710054,China;Xi'an Northwest Geology Institute of Nonferrous Metals Co.,Ltd.,Xi'an 710054,China;School of Resources Processing andBioengineering,Central South University,Changsha 410083,China)

机构地区：[1]陕西省矿产资源综合利用工程技术研究中心,陕西西安710054 [2]西安西北有色地质研究院有限公司,陕西西安710054 [3]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《稀有金属与硬质合金》2023年第1期5-9,16,共6页Rare Metals and Cemented Carbides

基　　金：陕西省重点研发计划项目(2022GY-173)。

摘　　要：陕西洋县毕机沟钒钛磁铁矿尾矿中氧化钪含量为97.08 g/t,为了充分回收这部分稀土资源,通过直接酸浸对钪进行浸出,系统研究了酸的种类及用量、助浸剂种类及用量、浸出温度、浸出液固比、浸出时间以及入料细度对钪浸出效果的影响。结果表明:不添加助浸剂的情况下,硫酸、盐酸、硫酸+氢氟酸、盐酸+氢氟酸对尾矿中钪的浸出效果均很差,但盐酸的浸出率较硫酸高,在盐酸体系下添加2^(#)助浸剂能够显著提高钪的浸出率;将尾矿磨矿至-0.075 mm占80%的细度,在2^(#)助浸剂用量15%、盐酸浓度6 mol/L、液固比3∶1、浸出温度90℃、浸出时间6 h的最佳条件下,钪浸出率达89.53%。该直接酸浸工艺对钪的浸出率高,且可操作性比较强,能够促进从尾矿中回收钪的发展。The content of Sc2O3in the tailings of Bijigou vanadium-titanium magnetite in Yang County,Shaanxi Province is 97.08 g/t.In order to fully recover the rare earth resources,scandium was leached by direct acid leaching,and the effects of acid type and dosage,aid-leaching agent type and dosage,leaching temperature,leaching liquid-solid ratio,leaching time,and feed fineness on the leaching rate of scandium were systematically studied.The results show that without the addition of aid-leaching agent,the leaching effects of H2SO4,HCl,H2SO4+HF,and HCl+HF on scandium in tailings are very poor,but the leaching rate by HCl is higher than that by H2SO4.Adding 2^(#)aid-leaching agent in HCl system can significantly increase the leaching rate of scandium.When the tailings are ground to a fineness of-0.075 mm paticles accounting for 80%,the leaching rate of scandium can reach 89.53%under the optimal conditions of 2^(#)aid-leaching agent dosage of 15%,HCl concentration of 6 mol/L,liquid-solid ratio of 3∶1,leaching temperature of 90℃,and leaching time of 6 h.The direct acid leaching process has a high leaching rate of scandium and is more operatable,which can promote the development of recovering scandium from tailings.

关 键 词：钒钛磁铁矿尾矿 钪 助浸剂 酸浸 盐酸 

分 类 号：TF854[冶金工程—有色金属冶金]