几内亚某高铁低品位铝土矿磁选提质试验研究  

Experimental Research on Upgrading a High-Iron and Low-Grade Bauxite Ore from Guinea with Magnetic Separation

作　　者：王泽东 陈禄政[1] 李敬[1] 戴普林 王克义 刘昌荣 展明鹏 曾剑武 熊涛 Wang Zedong;Chen Luzheng;Li Jing;Dai Pulin;Wang Keyi;Liu Changrong;Zhan Mingpeng;Zeng Jianwu;Xiong Tao(Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming,Yunnan 650093;SPIC Aluminum&Power Investment Co.,Ltd.,Yinchuan,Ningxia 750011;SLon Magnetic Separator Ltd.,Ganzhou,Jiangxi 341000)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]国家电投集团铝电投资有限公司,宁夏银川750011 [3]赣州金环磁选设备有限公司,江西赣州341000

出　　处：《非金属矿》2021年第5期68-70,74,共4页Non-Metallic Mines

基　　金：国家自然科学基金(51874152,51564028,51104076)。

摘　　要：几内亚某铝土矿Al_(2)O_(3)品位34.97%,Fe_(2)O_(3)品位26.50%,SiO_(2)品位6.11%,铝硅比5.72,Al_(2)O_(3)品位和铝硅比低,难以利用。本试验针对该铝土矿高铁、低铝,中等铝硅比的特点,提出“碎矿筛分-粗粒干式强磁选-细粒大颗粒脉动高梯度磁选”提质新工艺。结果表明,采用该磁选工艺,可获得Al_(2)O_(3)品位40.76%,Fe_(2)O_(3)品位20.64%,铝硅比为8.10的铝精矿产品,Al_(2)O_(3)回收率达到72.29%,Fe_(2)O_(3)去除率为51.69%。该磁选提质工艺无需磨矿,生产成本低,对环境无污染,可大幅降低后续氧化铝生产成本,为经济有效开发利用该类型铝土矿资源提供了一种新思路。The Al_(2)O_(3),Fe_(2)O_(3) and SiO_(2) grades of a Guinea bauxite are 34.97%,26.50%and 6.11%,respectively,with Al_(2)O_(3) and SiO_(2) mass ratio of 5.72,and thus it is difficult to be applied for alumina production due to its low Al_(2)O_(3) grade and Al_(2)O_(3) and SiO_(2) mass ratio.A“crushing and screeningdry high-intensity magnetic separation for coarse particles-large particle pulsating high gradient magnetic separation for fine particles”flowsheet was proposed to separate the bauxite ore.The results showed that a qualified aluminum concentrate assaying 40.76%Al_(2)O_(3) and 20.64%Fe_(2)O_(3),Al_(2)O_(3) and SiO_(2) mass ratio of 8.10 was produced,with the Al_(2)O_(3) recovery reaching 72.29%and the Fe_(2)O_(3) removal rate reaching 51.69%.In this new flowsheet,grinding process was not required,the separation cost was low and pollution would not be produced,which significantly reduced the subsequent aluminum production costs and thus provided a new way for the economical and effective utilization of such bauxite ores.

关 键 词：铝土矿 磁选 铁矿物 提质 

分 类 号：TD923[矿业工程—选矿] TD952