| 海砂矿深度还原-磁选分离实验研究 |
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| 引用本文： | 刘依然, 张建良, 王振阳, 刘征建, 邢相栋. 海砂矿深度还原-磁选分离实验研究[J]. 工程科学学报, 2016, 38(2): 181-186. DOI: 10.13374/j.issn2095-9389.2016.02.004 |
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| 作者姓名： | 刘依然 张建良 王振阳 刘征建 邢相栋 |
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| 作者单位： | 北京科技大学冶金与生态工程学院,北京,100083;西安建筑科技大学冶金工程学院,西安,710055 |
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| 基金项目： | 国家重点基础研究发展计划资助项目(2012CB720400) |
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| 摘 要： | 应用化学分析、扫描电镜观察和X射线衍射分析方法研究海砂矿的基础物性.采用煤基深度还原-磁选工艺,系统考察矿粉中Fe和Ti的还原分离行为,并明确还原温度、还原时间、碳氧比、磁感应强度和磨矿粒度对还原磁选效果的影响规律.结果表明:海砂矿主要由钛磁铁矿和钛赤铁矿组成;较优的还原分离工艺参数为还原温度1300℃、还原时间30 min、碳氧摩尔比1.1、磁感应强度50 mT和磨矿细度-0.074 mm质量分数86.34%.在此工艺条件下,可以获得金属化率94.23%的还原产物,磁选指标分别达到精矿铁品位97.19%和尾矿钛品位57.94%,对应的铁、钛回收率为90.28%和87.22%,有效地实现海砂矿中铁钛元素的分离富集.
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| 关 键 词： | 海砂矿 铁矿石还原 磁选分离 精矿铁 |
| 收稿时间： | 2014-11-12 |
Experimental research on the deep reduction-magnetic separation of ironsand |
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| LIU Yi-ran, ZHANG Jian-liang, WANG Zhen-yang, LIU Zheng-jian, XING Xiang-dong. Experimental research on the deep reduction-magnetic separation of ironsand[J]. Chinese Journal of Engineering, 2016, 38(2): 181-186. DOI: 10.13374/j.issn2095-9389.2016.02.004 |
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| Authors: | LIU Yi-ran ZHANG Jian-liang WANG Zhen-yang LIU Zheng-jian XING Xiang-dong |
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| Affiliation: | 1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China |
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| Abstract: | The basic characteristics of ironsand were systematically studied by chemical analysis, scanning electron microscopy and X-ray diffraction. A series of experiments were performed to investigate reduction-magnetic separation for Fe and Ti from iron-sand. The effects of reduction temperature, reduction time, carbon ratio, magnetic density, and grinding fineness on the reduction-magnetic separation process were investigated. It could be found that the ironsand mainly consisted of titanomagnetite and titanohematite. The optimal process parameters were obtained as follows:reduction temperature, 1300℃; reduction time, 30 min; C/O molar ratio, 1.1; magnetic density, 50 mT; and the grinding fineness of -0. 074 μm, 86. 34%. Under such conditions, the metallization rate, the iron grade of magnetic substance and the iron recovery reached to 94.23%, 97.19% and 90. 28%, respectively, and the titanium grade of non-magnetic substance and the titanium recovery were 57. 94% and 87.22%, respectively. The effective separation of iron and titanium could be achieved in this reduction-magnetic separation process. |
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| Keywords: | ironsand iron ore reduction magnetic separation iron concentrate |
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