Utilization of Zn-containing electric arc furnace dust for multi-metal doped ferrite with enhanced magnetic property: From hazardous solid waste to green product

Hui-Gang Wang; Mei Zhang; Min Guo

doi:10.1016/j.jhazmat.2017.06.039

Utilization of Zn-containing electric arc furnace dust for multi-metal doped ferrite with enhanced magnetic property: From hazardous solid waste to green product

J Hazard Mater. 2017 Oct 5:339:248-255. doi: 10.1016/j.jhazmat.2017.06.039. Epub 2017 Jun 20.

Authors

Hui-Gang Wang¹, Mei Zhang¹, Min Guo²

Affiliations

¹ School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
² School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China. Electronic address: guomin@ustb.edu.cn.

PMID: 28654789
DOI: 10.1016/j.jhazmat.2017.06.039

Abstract

One-step solid state reaction method was proposed for the first time to realize the transformation of the Zn-containing EAFD from hazardous solid waste to multi-metal doped ferrite with enhanced magnetic property. The effect of Zn-containing EAFD to NiCl₂·6H₂O mass ratio (R_ZE/N, g·g^-1) on the phases transformation was investigated by X-ray diffraction (XRD), Scanning electron microscopy (SEM) and Raman spectroscopy. The as-synthesized samples were treated by toxicity characteristic leaching procedure (TCLP). It is shown that the TCPL played a key role in determining both the purity and toxicity of the obtained ferrites. The pure metal doped Ni-Zn ferrite with higher saturation magnetization (Ms, 56.8 emu·g^-1) and lower coercivity (Hc, 58.5Oe) was gained under the optimum conditions. And the pure ferrite was a green product according to the TCLP and EN12457 standards. Moreover, the evaluation of environmental impact and the recovery ratio of the dust were also discussed.

Keywords: Green metal doped Ni-Zn ferrite; Magnetic property; Solid reaction method; TCLP; Zn-containing EAFD.