Effect of dry magnetic separator on pre-selection of magnetite under wind power

被引：0
作者：
Liu J.-J. [1 ,2 ]
Lu D.-F. [1 ]
Wang Y.-H. [1 ]
Zheng X.-Y. [1 ]
Li X.-D. [1 ]
Cheng Z.-Y. [1 ]
机构：
[1] School of Minerals Processing and Bioengineering, Central South University, Changsha
[2] Beijing Research Institute Co., Ltd., Ansteel Group Corporation Limited, Beijing
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2020年 / 30卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Action mechanism; Comsol simulation; Dry preselection; Inclusion of gangue; Magnetic agglomeration; Magnetite; Wind;
D O I：
10.11817/j.ysxb.1004.0609.2020-35876
中图分类号：
学科分类号：
摘要：
In order to solve the problem of gangue inclusion in the traditional dry magnetic separator, the air was introduced as a sorting medium, and the magnetic reunion was destroyed by the drag force of the air flow. Magnetite with a large range of particle sizes below 3 mm was used for pre-selection experiments. By changing the magnetic field strength, wind speed and drum speed, indicators such as concentrate grade, recovery rate, and separation efficiency under different conditions were obtained. The results show that the proper coupling of wind force and magnetic field can strengthen the dispersion in the material sorting process and reduce the inclusion of gangues caused by material deposition and magnetic agglomeration. Especially when the magnetic field strength is large enough, it can improve the precision. The mineral grade guarantees a higher recovery rate. The force of mineral particles was analyzed and calculated. Comsol simulation software was used to simulate the particle trajectory under different wind speeds. At the same time, the chemical compositions of the ore samples before and after the experiment were compared, and the action mechanism of wind force during the separation process was obtained. The dry-type magnetic separator under the action of wind force has a low beneficiation cost and is of great value for popularization and application. © 2020, Science Press. All right reserved.
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页码：2482 / 2491
页数：9
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