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A new metallurgical process for the clean utilization of chromite ore
Alternative TitleInt. J. Miner. Process.
Chen, Gang1,2; Wang, Xiaohui1; Wang, Jiajun3; Du, Hao1; Zhang, Ying1; Zheng, Shi-Li1; Zhang, Yi1
2014-09-10
Source PublicationINTERNATIONAL JOURNAL OF MINERAL PROCESSING
ISSN0301-7516
Volume131Issue:SEPPages:58-68
AbstractA new metallurgical process for extracting chromium from chromite ore is proposed to overcome the severe chromium (VI) pollution in chromate production industry. When the 60 wt.% KOH solution was used to decompose chromite ore, the chromium and iron ions in chromite ore were oxidized into soluble K(2)CraO(4) crystal and insoluble KFe3O5 particle, respectively. The chromium levels in the new residue meet the emission standard of chromium-containing waste due to the KFe3O5 crystal's compact appearance, hence the pollution problem of chromite ore process residue is thoroughly resolved. The effect of the main variables on this clean metallurgical process was systematically investigated. Under the condition of leaching temperature 200 degrees C, oxygen partial pressure 2.0 MPa, and particle size 0.045-0.063 mm, the chromium extraction reached up to 99.4% after 5 h reaction. There is no product layer existing during the leaching process, and the reaction rate is controlled by the surface reaction. The resistances of oxygen transport during the leaching process were calculated step by step, and the surface chemical reaction was the main resistance factor that was consistent with the kinetics study. (C) 2014 Elsevier B.V. All rights reserved.; A new metallurgical process for extracting chromium from chromite ore is proposed to overcome the severe chromium (VI) pollution in chromate production industry. When the 60 wt.% KOH solution was used to decompose chromite ore, the chromium and iron ions in chromite ore were oxidized into soluble K(2)CraO(4) crystal and insoluble KFe3O5 particle, respectively. The chromium levels in the new residue meet the emission standard of chromium-containing waste due to the KFe3O5 crystal's compact appearance, hence the pollution problem of chromite ore process residue is thoroughly resolved. The effect of the main variables on this clean metallurgical process was systematically investigated. Under the condition of leaching temperature 200 degrees C, oxygen partial pressure 2.0 MPa, and particle size 0.045-0.063 mm, the chromium extraction reached up to 99.4% after 5 h reaction. There is no product layer existing during the leaching process, and the reaction rate is controlled by the surface reaction. The resistances of oxygen transport during the leaching process were calculated step by step, and the surface chemical reaction was the main resistance factor that was consistent with the kinetics study. (C) 2014 Elsevier B.V. All rights reserved.
KeywordChromite Ore Chromium (Vi) Pollution Oxidative Leaching Kinetics Oxygen Transfer
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
DOI10.1016/j.minpro.2014.07.002
URL查看原文
Indexed BySCI
Language英语
WOS KeywordELECTROLYTE-SOLUTIONS ; OXYGEN ; SOLUBILITY ; DIFFUSION ; WATER
WOS Research AreaEngineering ; Mineralogy ; Mining & Mineral Processing
WOS SubjectEngineering, Chemical ; Mineralogy ; Mining & Mineral Processing
WOS IDWOS:000343376400008
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11667
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Grad Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China
Recommended Citation
GB/T 7714
Chen, Gang,Wang, Xiaohui,Wang, Jiajun,et al. A new metallurgical process for the clean utilization of chromite ore[J]. INTERNATIONAL JOURNAL OF MINERAL PROCESSING,2014,131(SEP):58-68.
APA Chen, Gang.,Wang, Xiaohui.,Wang, Jiajun.,Du, Hao.,Zhang, Ying.,...&Zhang, Yi.(2014).A new metallurgical process for the clean utilization of chromite ore.INTERNATIONAL JOURNAL OF MINERAL PROCESSING,131(SEP),58-68.
MLA Chen, Gang,et al."A new metallurgical process for the clean utilization of chromite ore".INTERNATIONAL JOURNAL OF MINERAL PROCESSING 131.SEP(2014):58-68.
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