LAPSE:2019.1345
Published Article
LAPSE:2019.1345
Arsenic Removal from Arsenopyrite-Bearing Iron Ore and Arsenic Recovery from Dust Ash by Roasting Method
Rijin Cheng, Hua Zhang, Hongwei Ni
December 10, 2019
In most cases, arsenic is an unfavorable element in metallurgical processes. The mechanism of arsenic removal was investigated through roasting experiments performed on arsenopyrite-bearing iron ore. Thermodynamic calculation of arsenic recovery was carried out by FactSage 7.0 software (Thermfact/CRCT, Montreal, Canada; GTT-Technologies, Ahern, Germany). Moreover, the arsenic residues in dust ash were recovered by roasting dust ash in a reducing atmosphere. Furthermore, the corresponding chemical properties of the roasted ore and dust ash were determined by X-ray diffraction, inductively coupled plasma atomic emission spectrometry, and scanning electron microscopy, coupled with energy-dispersive X-ray spectroscopy. The experimental results revealed that the arsenic in arsenopyrite-bearing iron ore can be removed in the form of As2O3(g) in an air or nitrogen atmosphere by a roasting method. The efficiency of arsenic removal through roasting in air was found to be less than that in nitrogen atmosphere. The method of roasting in a reducing atmosphere is feasible for arsenic recovery from dust ash. When the carbon mass ratio in dust ash is 1.83%, the arsenic removal products is almost volatilized and recovered in the form of As2O3(g).
Keywords
arsenate, arsenic recovery, arsenic removal, arsenopyrite, dust ash, mechanism, roasting
Subject
Suggested Citation
Cheng R, Zhang H, Ni H. Arsenic Removal from Arsenopyrite-Bearing Iron Ore and Arsenic Recovery from Dust Ash by Roasting Method. (2019). LAPSE:2019.1345
Author Affiliations
Cheng R: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China; Technical Center, HBIS Group Hansteel Company, Handan 056001, China; Key Laboratory for Ferrous Metallurgy and Resources Utilization [ORCID]
Zhang H: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China; Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, [ORCID]
Ni H: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
Journal Name
Processes
Volume
7
Issue
10
Article Number
E754
Year
2019
Publication Date
2019-10-16
Published Version
ISSN
2227-9717
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PII: pr7100754, Publication Type: Journal Article
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LAPSE:2019.1345
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doi:10.3390/pr7100754
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Dec 10, 2019
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Dec 10, 2019
 
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Calvin Tsay
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