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Innovative methodology for recovering titanium and chromium from a raw ilmenite concentrate by magnetic separation after modifying magnetic properties
Lv, Jin-Fang1,2,4; Zhang, Han-Ping4; Tong, Xiong1,2; Fan, Chun-Lin5; Yang, Wen-Tao3; Zheng, Yong-Xing1
2017-03-05
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume325Pages:251-260
Abstract

Raw ilmenite concentrate containing Cr can be either as a resource or as one kind of the most hazardous solid waste. In order to recover titanium and chromium from the raw concentrate which was separated from the Promenade deposit, Gaza province, Mozambique, an innovative technology using modification of magnetic property followed by magnetic separation was proposed. Magnetic property, phase and surface morphology of the sample before and after oxidizing roasting were firstly characterized by magnetism, chemistry, XRD and MLA analyses to interpret the mechanism of oxidizing roasting of the ilmenite. Then, these factors such as oxidizing roasting temperature, residence time and magnetic induction affecting on magnetic separation performance were examined and the optimum process parameters were determined. A commercial concentrate containing 47.94% TiO2 and 0.23% Cr2O3 was obtained and the recovery of TiO2 and Cr2O3 was 78.52% and 5.42%, respectively. The tailing obtained was preliminarily concentrated by a high-intensity magnetic separator and a rough chromite concentrate was gained. In order to further purify the rough one, reducing roasting was carried out to transform the minerals containing hematite into the minerals containing magnetite, followed by a low-intensity magnetic separation. The effects of these parameters such as temperature, carbon powder dosage, holding time and magnetic induction on magnetic separation performance were investigated and the optimal conditions were determined. A concentrate containing 28.65% Cr2O3 was obtained and the total recovery of Cr2O3 was 84.18%. (C) 2016 Published by Elsevier B.V.

KeywordRaw Ilmenite Concentrate Chromite Oxidizing Roasting Reducing Roasting Modification Of Magnetic Property Magnetic Separation
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Life Sciences & Biomedicine
DOI10.1016/j.jhazmat.2016.11.075
Indexed BySCI
Language英语
WOS KeywordPanzhihua Ilmenite ; Morphological-changes ; Phase-transitions ; Iron-ore ; Oxidation ; Impurities ; Reduction ; Preoxidation ; Particles ; Mechanism
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Engineering, Civil ; Environmental Sciences
Funding OrganizationNational Natural Science Foundation of China(51604131) ; Yunnan Province Collaborative Innovation Center Fund of Complex Nonferrous Metal Resources Comprehensive Utilization(KKPT201663011) ; Talent & Training Program of Yunnan Province(KKSY201563041) ; Testing and Analyzing Funds of Kunming University of Science and Technology(2016T20150055 ; 2016P2013101003)
WOS IDWOS:000392165700025
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21878
Collection多相复杂系统国家重点实验室
Affiliation1.Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Peoples R China
2.Kunming Univ Sci & Technol, Fac Land Resource Engn, Kunming 650093, Peoples R China
3.Yunnan XinLi Nonferrous Met Co Ltd, Kunming 650100, Peoples R China
4.KunMing Met Res Inst, Kunming 650093, Peoples R China
5.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Lv, Jin-Fang,Zhang, Han-Ping,Tong, Xiong,et al. Innovative methodology for recovering titanium and chromium from a raw ilmenite concentrate by magnetic separation after modifying magnetic properties[J]. JOURNAL OF HAZARDOUS MATERIALS,2017,325:251-260.
APA Lv, Jin-Fang,Zhang, Han-Ping,Tong, Xiong,Fan, Chun-Lin,Yang, Wen-Tao,&Zheng, Yong-Xing.(2017).Innovative methodology for recovering titanium and chromium from a raw ilmenite concentrate by magnetic separation after modifying magnetic properties.JOURNAL OF HAZARDOUS MATERIALS,325,251-260.
MLA Lv, Jin-Fang,et al."Innovative methodology for recovering titanium and chromium from a raw ilmenite concentrate by magnetic separation after modifying magnetic properties".JOURNAL OF HAZARDOUS MATERIALS 325(2017):251-260.
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