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Engineering Review : International journal for publishing of original researches from the aspect of structural analysis, materials and new technologies in the field of mechanical engineering, shipbuilding, fundamental engineering sciences, computer sciences, electrical engin, Vol. 40 No. 1, 2020.

Original scientific paper

https://doi.org/10.30765/er.40.1.02

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

Liang Chang Shi ; 1.College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454003, China;2.Henan Key Laboratory for Green and Efficient Mining & Comprehensive Utilization of Mineral Resources, Henan Polytechnic University, Jiaozuo, Hen
Nan Sheng Wang ; 1.College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454003, China;
Gan Cheng ; 1.College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454003, China;2.Henan Key Laboratory for Green and Efficient Mining & Comprehensive Utilization of Mineral Resources, Henan Polytechnic University, Jiaozuo, Hen

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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.

Keywords

fine-grained steel slag; dry magnetic separation; self-developed magnetic separator; magnetic system; iron recovery

Hrčak ID:

232821

URI

https://hrcak.srce.hr/232821

Publication date:

27.1.2020.

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