Dry magnetic separation technology for the recovery of iron minerals in fine-grained steel slag

IF 0.7 Q3 ENGINEERING, MULTIDISCIPLINARY Engineering Review Pub Date : 2020-01-27 DOI:10.30765/er.40.1.02

L. Shi, N. Wang, G. Cheng

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引用次数: 1

Abstract

Using the MagNet software package, a permanent magnetic circuit was simulated and a sectorially-spliced magnetic system was designed. Consequently, a new roller permanent magnetic separator with different magnetic field intensities in each roller was developed. The modular structural design allows fine-grained minerals with different magnetic susceptibility to be separated in one pass, according to their different processing characteristic. Steel slag, selected from a factory, was crushed, ground and sieved into different particle size ranges for the single-factor magnetic separation experiments. It was determined that the optimum value ranges for the particle size, magnetic separation distance and rotating frequency were 0.15 mm-0.3 mm, 10 mm-12 mm, 40 Hz～60Hz, respectively; using the chosen parameter values of 0.2mm, 11mm, and 40Hz, the concentrate recovery and concentrate grade of the new separation technology reached up to 52.78% and 64.74%, in comparisson with the existing technology. Thus, it was demonstrated that the self-developed separation technology has the potential to improve the iron recovery of the fine-grained steel slag.

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细粒钢渣中铁矿物的干式磁选回收技术

使用MagNet软件包，对永磁电路进行了仿真，并设计了一个扇形拼接磁系统。因此，开发了一种新的辊式永磁分离器，每个辊具有不同的磁场强度。模块化结构设计允许具有不同磁化率的细粒矿物根据其不同的加工特性一次性分离。从一家工厂挑选的钢渣经过粉碎、研磨和筛选成不同的粒度范围，进行单因素磁选实验。确定了颗粒尺寸、磁分离距离和旋转频率的最佳值范围分别为0.15mm-0.3mm、10mm-12mm和40Hz～60Hz；在0.2mm、11mm和40Hz的参数选择下，新分离技术的精矿回收率和精矿品位分别达到52.78%和64.74%。因此，证明了自行开发的分离技术具有提高细粒钢渣铁回收率的潜力。

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来源期刊

Engineering Review ENGINEERING, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

0.00%

发文量

期刊介绍： Engineering Review is an international journal designed to foster the exchange of ideas and transfer of knowledge between scientists and engineers involved in various engineering sciences that deal with investigations related to design, materials, technology, maintenance and manufacturing processes. It is not limited to the specific details of science and engineering but is instead devoted to a very wide range of subfields in the engineering sciences. It provides an appropriate resort for publishing the papers covering prior applications – based on the research topics comprising the entire engineering spectrum. Topics of particular interest thus include: mechanical engineering, naval architecture and marine engineering, fundamental engineering sciences, electrical engineering, computer sciences and civil engineering. Manuscripts addressing other issues may also be considered if they relate to engineering oriented subjects. The contributions, which may be analytical, numerical or experimental, should be of significance to the progress of mentioned topics. Papers that are merely illustrations of established principles or procedures generally will not be accepted. Occasionally, the magazine is ready to publish high-quality-selected papers from the conference after being renovated, expanded and written in accordance with the rules of the magazine. The high standard of excellence for any of published papers will be ensured by peer-review procedure. The journal takes into consideration only original scientific papers.