高铁高硫铝土矿氧压提质脱硫降铁研究  

Research on Improving the Quality of High Iron and High Sulfur Bauxite by Removing Sulfur and Iron Through Oxygen Pressure Process

作　　者：张正阳 王海北 杨玮娇 杨永强 韦其晋 彭煜华 王伟 ZHANG Zhengyang;WANG Haibei;YANG Weijiao;YANG Yongqiang;WEI Qijin;PENG Yuhua;WANG Wei(BGRIMM Technology Group,Beijing 100160,China)

机构地区：[1]矿冶科技集团有限公司,北京100160

出　　处：《有色金属（冶炼部分）》2024年第10期119-127,共9页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家重点研发计划项目(2022YFC2904403)。

摘　　要：高铁高硫铝土矿的提质利用对于保障我国铝工业战略矿产资源安全具有重要意义。针对含铁13.66%、硫16.24%的一水硬铝石型高铁高硫铝土矿,主要铁、硫物相为黄铁矿,绘制了Fe-S-H2O系电位-pH图。结果表明,当体系pH小于Fe3+水解临界pH时,能够实现铁、硫的同步浸出。采用加压浸出法处理,在液固比4 mL/g、浸出温度170℃、氧气分压0.20 MPa、保温时间2 h条件下,铁、硫浸出率分别为94.08%和98.34%,浸出渣铁、硫含量分别为1.23%和0.41%,XRD结果表明,浸出渣物相主要为一水硬铝石,实现了高铁高硫铝土矿的提质。浸出液主要溶质为硫酸铁,具有铁、硫进一步资源化利用的潜力。The improvement and utilization of high iron and high sulfur bauxite is of great significance for ensuring the safety of strategic mineral resources in China′s aluminum industry.A potential pH diagram of Fe-S-H 2 O system was plotted for a high iron and high sulfur diaspore bauxite with mass fraction of 13.66%iron and 16.24%sulfur,mainly consisting of pyrite.The results show that synchronous leaching of iron and sulfur can be achieved when the pH value of the system is less than the critical pH value of Fe 3+hydrolysis.Under the conditions of a liquid-solid ratio of 4 mL g,leaching temperature of 170℃,oxygen partial pressure of 0.20 MPa,and insulation time of two hours,the leaching rate of iron and sulfur is 94.08%and 98.34%,respectively,and the iron and sulfur mass fration in the leaching residue is 1.23%and 0.41%,respectively.The XRD results show that the main phase of the leaching residue is diaspore,achieving the improvement of high iron and high sulfur bauxite.The main solute of the leaching solution is iron sulfate,which has the potential for further resource utilization of iron and sulfur.

关 键 词：高铁高硫铝土矿 提质利用 加压浸出 Fe-S-H2O系 

分 类 号：TF821[冶金工程—有色金属冶金]