Leaching of chromite ore in concentrated KOH by catalytic oxidation using CuO as catalyst
Liu, Long-jie1,2; Du, Hao1,2; Zhang, Yang1; Zheng, Shi-li1; Zhang, Yi1
2017-04-01
发表期刊TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
卷号27期号:4页码:891-900
摘要CuO was used as a catalyst in the concentrated KOH solution to enhance the leaching of chromium from the chromite ore. The impacts of temperature, KOH-to-chromite ore mass ratio, CuO-to-chromite ore mass ratio, and gas flow rate on the chromium leaching rate were investigated. The results indicated that CuO played an important role in improving the chromium leaching rate. The leaching rate reached 98% after leaching for 6 h when CuO was applied, whereas it was only 60.8% without CuO under the same reaction conditions: temperature 230 degrees C, KOH-to-ore mass ratio 6: 1, stirring speed 700 r/min, gas flow rate 1 L/min. According to the kinetics study, the catalytic oxidation was controlled by surface chemical reaction and the activation energy was calculated to be 15.79 kJ/mol when the temperature was above 230 degrees C. In contrast, without CuO, the rate-determining step was external diffusion and the apparent activation energy was 38.01 kJ/mol.
关键词Chromite Ore Copper Oxide Leaching Catalytic Oxidation
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/S1003-6326(17)60103-1
收录类别SCI
语种英语
关键词[WOS]POTASSIUM CHROMATE ; PRESSURE ; ACIDS
WOS研究方向Metallurgy & Metallurgical Engineering
WOS类目Metallurgy & Metallurgical Engineering
项目资助者National Basic Research of China(2013CB632601) ; National Natural Science Foundation of China(91634111 ; 51404227)
WOS记录号WOS:000404567000020
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/22708
专题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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Liu, Long-jie,Du, Hao,Zhang, Yang,et al. Leaching of chromite ore in concentrated KOH by catalytic oxidation using CuO as catalyst[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2017,27(4):891-900.
APA Liu, Long-jie,Du, Hao,Zhang, Yang,Zheng, Shi-li,&Zhang, Yi.(2017).Leaching of chromite ore in concentrated KOH by catalytic oxidation using CuO as catalyst.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,27(4),891-900.
MLA Liu, Long-jie,et al."Leaching of chromite ore in concentrated KOH by catalytic oxidation using CuO as catalyst".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 27.4(2017):891-900.
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