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山东某赤泥磁化焙烧—磁选提铁初探
引用本文:柳晓,韩跃新,李艳军,高鹏,张淑敏,查泽鹏. 山东某赤泥磁化焙烧—磁选提铁初探[J]. 金属矿山, 2019, 48(2): 60-64
作者姓名:柳晓  韩跃新  李艳军  高鹏  张淑敏  查泽鹏
作者单位:东北大学资源与土木工程学院,辽宁沈阳110819;难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,辽宁沈阳110819;东北大学资源与土木工程学院,辽宁沈阳110819;难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,辽宁沈阳110819;东北大学资源与土木工程学院,辽宁沈阳110819;难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,辽宁沈阳110819;东北大学资源与土木工程学院,辽宁沈阳110819;难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,辽宁沈阳110819;东北大学资源与土木工程学院,辽宁沈阳110819;难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,辽宁沈阳110819;东北大学资源与土木工程学院,辽宁沈阳110819;难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,辽宁沈阳110819
基金项目:基金项目:国家自然科学基金项目(编号51734005,51674065)。
摘    要:
随着我国氧化铝产量的不断增大,排放的赤泥量也日益增加,普通堆存处置的方式所带来的污染生态环境、占用土地资源等问题越来越突出。为有效富集赤泥中的铁,以山东某赤泥为研究对象,在矿石性质分析的基础上,进行了磁化焙烧-弱磁选工艺流程试验。结果显示:赤泥铁品位为37.37%,赤泥中铁主要存在于赤、褐铁矿中,赤、褐铁矿中铁占总铁的98.23%;赤泥在CO浓度30%、焙烧温度620 ℃、焙烧时间为20 min的条件下磁化焙烧,焙烧产品磨细至-0.038 mm含量70%,在磁场强度为85.6 kA/m条件下进行弱磁选,可获得铁品位47.01%、作业回收率73.01%的最终铁精矿。对获得的铁精矿进行铁物相分析、XRD分析和磁性分析可知,赤泥中的赤、褐铁矿在磁化焙烧过程中大部分被还原成磁铁矿,铁矿物磁性增强,进而可以通过弱磁选实现铁矿物与脉石矿物的分离。但是针对铁精矿中铁品位的继续提升与铝的脱除需要进一步的研究。

关 键 词:赤泥  赤铁矿  磁铁矿  磁化焙烧  物相

Primary Study on Magnetizing Roasting-Magnetic Separation of Red Mud in Shandong
Liu Xiao,Han Yuexin,Li Yanjun,Gao Peng,Zhang Shumin,Zha Zepeng. Primary Study on Magnetizing Roasting-Magnetic Separation of Red Mud in Shandong[J]. Metal Mine, 2019, 48(2): 60-64
Authors:Liu Xiao  Han Yuexin  Li Yanjun  Gao Peng  Zhang Shumin  Zha Zepeng
Affiliation:1. School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China;2. National-Local Joint Engineering Research Center of Refractory Iron Ore Resources Efficient Utilization Technology,Shenyang 110819, China
Abstract:
With the continuous increase of alumina production in China, the discharged amount of red mud is also increasing day by day. The problems of ecological environment pollution and land resource occupation caused by common methods of storage and disposal are becoming more and more prominent. In order to effectively enrich iron in red mud, the technological process of magnetizing roasting-magnetic separation was adopted taken a red mud in Shandong Province as the research object, based on the analysis of ore properties. The results indicated that the iron grade of red mud was 37.37%, and the iron in red mud mainly existed in hematite and limonite, which accounted for 98.23% of the total iron. Iron concentrate with iron grade of 47.01% and recovery of 73.01% could be obtained under the conditions of CO concentration 30%, magnetizing roasting temperature 620 ℃ and roasting time 20 min, roasted products ground to 70% passing 0.038 mm, then via low intensity magnetic separation at magnetic field intensity of 85.6 kA/m. The iron phase analysis, X-ray diffraction analysis and magnetism analysis on iron concentrate indicated that most of the hematite and limonite in red mud could be transformed into magnetite during the magnetizing roasting, the magnetization of iron ore is increased, and the separation of iron minerals and gangue minerals can be realized by low intensity magnetic separation.but further research should be taken aiming at increase of iron grade and decrease of aluminum.
Keywords:Red mud  Hematite  Magnetite  Magnetizing roasting  Phase
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