Original scientific paper

Experimental study on iron recovery by microwave carbon heat reduction-magnetic separation from red mud

Y. L. Cong ; School of Materials and Metallurgy, University of Science and Technology Liaoning, China
Z. J. He ; School of Materials and Metallurgy, University of Science and Technology Liaoning, China
J. H. Zhang ; School of Materials and Metallurgy, University of Science and Technology Liaoning, China
Q. H. Pang ; School of Materials and Metallurgy, University of Science and Technology Liaoning, China

Abstract

To explore new ways to recycle red mud, this paper study on iron recovery by microwave carbon heat reductionmagnetic separation from red mud. Using orthogonal experimental method，study the effect of carbon to oxygen ratio, microwave power, heating time and slag former ratio on recovery of iron. The results show that microwave power is the main factor affecting iron recovery. After optimized by orthogonal experimental results, in the case when carbon to oxygen ratio is 1,5, microwave power is 3 000 W, heating time is 45 min, slag former ratio is 5 %, the grade and recovery of iron reach to 64,58 % and 90,64 % respectively. Analyzed comprehensivly by X-ray diffraction (XRD), Scanning Electron Microscope (SEM) and Energy Dispersive Spectrometer (EDS), Fe₂O₃ in red mud is reduced to Fe₃O₄ and Fe by microwave carbon heat reduction.

Keywords

red mud; microwave; carbon heat reduction; magnetic separation

Hrčak ID:

189368

URI

https://hrcak.srce.hr/189368

Publication date:

1.1.2018.

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