Thermodynamics study on leaching process of gibbsitic bauxite by hydrochloric acid

作     者：赵爱春 刘燕 张廷安 吕国志 豆志河 Ai-chun ZHAO;Yan LIU;Ting-an ZHANG;Guo-zhi L(U);Zhi-he DOU

作者机构：东北大学材料与冶金学院多金属共生矿生态化利用教育部重点实验室沈阳110004 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2013年第23卷第1期

页      面：266-270页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：Projects(50974035,51074047,51004033) supported by the National Natural Science Foundation of China Project(2008BAB34B01) supported by the National Science and Technology Pillar Program of China during the Eleventh Five-Year Plan Period Project (N100302005) supported by the National Higher-education Institution General Research and Development Funding,China Project (2010AA03A405) supported by the Hi-tech Research and Development Program of China 

主　　题：alumina bauxite gibbsitic bauxite acid leaching thermodynamics 

摘      要：For the low-grade gibbsitic bauxite,the leaching rate of alumina is very low during the Bayer *** acid leaching method is attracting more attention,and the hydrochloric acid leaching was developed *** mineral composition and chemical composition were investigated by X-ray diffraction analysis and semi-quantitative *** thermodynamics of leaching process was *** results show that the major minerals in the bauxite are gibbsite,secondly goethite and quartz,anatase and so *** acid leaching reactions of the bauxite would be thermodynamically easy and *** the conditions that ore granularity is less than-55 μm,the L/S ratio is 100：7,and the leaching temperature is 373-383 K,the leaching time is 120 min and the concentration of HCl is 10%,both the leaching rates of Al and Fe are over 95%.The main composition of leaching slag is SiO2 which is easy for comprehensive utilization.