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Effects of temperature, CO content, and reduction time on the selective reduction of a limonitic laterite ore
Sun, Ningjie1; Wang, Zhe1; Guo, Zhancheng1; Zhang, Guangqing2; Qi, Tao3
2021-12-01
Source PublicationMINERALS ENGINEERING
ISSN0892-6875
Volume174Pages:11
AbstractThe production of nickel and cobalt from laterite ores has gained increasing attention as their demands continue to rise. This study evaluated the effects of temperature (700-1000 degrees C), CO content (10-70 vol%), and reduction time (10-90 min) on the selective reduction of a limonitic laterite ore and examined the mechanism of the selective reduction. SEM/EDS observation shows that the ore consists of goethite, hematite and small particles of clinochlore cemented by amorphous iron-rich silicate phase. Nickel and cobalt occur with goethite mineral in this ore. It was observed that fine grains of Fe-Ni-Co alloy dispersed within magnetite phase in reduced samples. XRD and XPS analyses show increased Fe2SiO4 generation with increasing reduction temperature, and elements nickel and cobalt were capatured in Fe2SiO4 according to SEM/EDS observation. Reduction at temperature above 850 degrees C resulted in a sharp increase in Fe2SiO4 generation and decrease in the specific surface area of the ore. The morphological and compositional observations indicate that CO content over 20 vol% promoted Fe formation from the laterite ore but hardly enhanced the formation of Ni and Co. The difference in equilibrium CO partial pressures for the formation of Fe, Ni, Co accounts for selective reduction. The current study suggests that selective reduction can be achieved by controlling reduction temperature and gas composition. Under the optimum condition of 850 degrees C, 20 vol% CO-80 vol% CO2 and 60 min, the degrees of metallisation of iron, nickel, and cobalt reduction were 17.5%, 87.3%, and 91.5%, respectively.
KeywordLimonitic laterite ore Selective reduction Activity Specific surface area Nickel Cobalt
DOI10.1016/j.mineng.2021.107277
Language英语
WOS KeywordSULFURIC-ACID ; SODIUM-SULFATE ; NICKEL ; EXTRACTION ; IRON ; COBALT ; BENEFICIATION
Funding ProjectFundamental Research Funds for the Central Universities[FRF-TP-20-018A3] ; Project of State Key Laboratory of Advanced Metallurgy[41620012]
WOS Research AreaEngineering ; Mineralogy ; Mining & Mineral Processing
WOS SubjectEngineering, Chemical ; Mineralogy ; Mining & Mineral Processing
Funding OrganizationFundamental Research Funds for the Central Universities ; Project of State Key Laboratory of Advanced Metallurgy
WOS IDWOS:000717850600001
PublisherPERGAMON-ELSEVIER SCIENCE LTD
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/51133
Collection中国科学院过程工程研究所
Corresponding AuthorWang, Zhe
Affiliation1.Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China
2.Univ Wollongong, Sch Mech Mat Mechatron & Biomed Engn, Wollongong, NSW 2522, Australia
3.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Sun, Ningjie,Wang, Zhe,Guo, Zhancheng,et al. Effects of temperature, CO content, and reduction time on the selective reduction of a limonitic laterite ore[J]. MINERALS ENGINEERING,2021,174:11.
APA Sun, Ningjie,Wang, Zhe,Guo, Zhancheng,Zhang, Guangqing,&Qi, Tao.(2021).Effects of temperature, CO content, and reduction time on the selective reduction of a limonitic laterite ore.MINERALS ENGINEERING,174,11.
MLA Sun, Ningjie,et al."Effects of temperature, CO content, and reduction time on the selective reduction of a limonitic laterite ore".MINERALS ENGINEERING 174(2021):11.
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