拜耳法溶出中低品位矿降低碱耗的研究现状  

The Research Status of Alkali Consumption Reduction by Dissolution of Middle and Low Grade Ore by Bayer Process

作　　者：李永刚[1] 张涛[2] 俞小花[2] LI Yong-gang;ZHANG Tao;YU Xiao-hua(Kunming Metallurgical Research Institute,Kunming,Yunnan 650031,China;Metallurgy and Energy Engineering College,Kunming University of Science and Technology,Kunming,Yunnan 650093,China)

机构地区：[1]昆明冶金研究院,云南昆明650031 [2]昆明理工大学冶金与能源工程学院,云南昆明650093

出　　处：《云南冶金》2018年第4期27-32,共6页Yunnan Metallurgy

基　　金：国家自然科学基金(51374118);云南省选冶新技术重点实验室开放基金(xy2015kf03)

摘　　要：我国的铝土矿绝大部分是高铝、高硅的一水硬铝石型,铝硅比(A/S)在5~8的中低品位矿占80%以上,经济有效地采用拜耳法生产氧化铝较困难。为提高我国氧化铝产业的竞争力,很有必要对拜耳法生产氧化铝进行生产工艺的优化,降低碱耗。本文主要从原料处理、添加剂、溶出工艺三方面介绍了近年来国内外学者为降低碱耗进行的研究。Most bauxite in our country is a kind of diasporic bauxite with high aluminum and high silicon, the middle and low grade ore that aluminum and silicon ratio （A/S） is 5 - 8 have more than 80% content, it is very difficult to produce the alumina by Bayer process cost - effectively. It is necessary to optimize the production process of alumina which is originally produced by Bayer process, to decrease the alkali consumption in order to improve the competitiveness of alumina industry of our country. The study on decreasing of alkali consumption in recent years carried by domestic and foreign scholar is introduced mainly from the aspects that raw material treatment, addition agent and dissolution rate.

关 键 词：低品位铝土矿 拜耳法 碱耗 预脱硅 溶出工艺 

分 类 号：TF821[冶金工程—有色金属冶金]