中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Decomposition of chromite ore by oxygen in molten NaOH-NaNO3

文献类型:期刊论文

作者Zhang, Yang1,2; Zheng, Shi-li1; Xu, Hong-bin1; Du, Hao1; Zhang, Yi1
刊名INTERNATIONAL JOURNAL OF MINERAL PROCESSING
出版日期2010-07-01
卷号95期号:1-4页码:10-17
关键词Chromite Sodium hydroxide Sodium nitrate Sodium nitrite Oxidation
ISSN号0301-7516
通讯作者Zheng, SL
英文摘要An optimized process production of chromate by oxygen was proposed. The tests are executed by introducing NaNO3 to the decomposition process of chromite ore in molten NaOH to decrease the decomposition temperature. An interesting result is that the reaction temperature could decrease from above 500 degrees C to about 400 degrees C, and sodium nitrate has no consumption in the oxidation process, while the Cr yield is above 99%. Mechanism analysis shows that chromite ore is firstly oxidized by NaNO3, where NaNO2 is generated as a reduction product, and then is oxidized to NaNO3. NaNO3 plays the role of oxygen carrier, which can reduce the mass transfer resistance of oxygen. The kinetic study shows that the decomposition process was an internal diffusion controlled, with an apparent activation energy of 106 kJ/mol. Effects of liquid-to-ore ratio, chromite ore particle size, and reaction temperature on the decomposition of chromite ore were also studied. (C) 2010 Elsevier B.V. All rights reserved.
WOS标题词Science & Technology ; Technology ; Physical Sciences
类目[WOS]Engineering, Chemical ; Mineralogy ; Mining & Mineral Processing
研究领域[WOS]Engineering ; Mineralogy ; Mining & Mineral Processing
关键词[WOS]MANUFACTURING PROCESS ; POTASSIUM HYDROXIDE ; SODIUM CHROMATE ; SALTS
收录类别SCI
语种英语
WOS记录号WOS:000279623500002
公开日期2013-11-15
版本出版稿
源URL[http://ir.ipe.ac.cn/handle/122111/6124]  
专题过程工程研究所_湿法冶金清洁生产技术国家工程实验室
作者单位1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Zhang, Yang,Zheng, Shi-li,Xu, Hong-bin,et al. Decomposition of chromite ore by oxygen in molten NaOH-NaNO3[J]. INTERNATIONAL JOURNAL OF MINERAL PROCESSING,2010,95(1-4):10-17.
APA Zhang, Yang,Zheng, Shi-li,Xu, Hong-bin,Du, Hao,&Zhang, Yi.(2010).Decomposition of chromite ore by oxygen in molten NaOH-NaNO3.INTERNATIONAL JOURNAL OF MINERAL PROCESSING,95(1-4),10-17.
MLA Zhang, Yang,et al."Decomposition of chromite ore by oxygen in molten NaOH-NaNO3".INTERNATIONAL JOURNAL OF MINERAL PROCESSING 95.1-4(2010):10-17.

入库方式: OAI收割

来源:过程工程研究所

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