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Desiliconization kinetics of nickeliferous laterite ores in molten sodium hydroxide system
Alternative TitleDesiliconization kinetics of nickeliferous laterite ores in molten sodium hydroxide system
Mu Wenning; Zhai Yuchun
2010
Source PublicationTRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
Volume20Issue:2Pages:330-335
AbstractA novel process was proposed for treating nickeliferous laterite ores with molten sodium hydroxide. The effect on silicon extraction caused by the factors, such as stirring speed, reaction temperature, particle size and NaOH-to-ore mass ratio, was investigated. The results show that increasing stirring speed, reaction temperature and NaOH-to-ore mass ratio while decreasing particle size increases silicon extraction rate. The desiliconization kinetics of nickeliferous laterite ores in molten sodium hydroxide system was described successfully by chemical reaction control model. The activation energy of the desiliconization process was found to be 44.01 kJ/mol, and the reaction rate based on a chemical reaction-controlled process can be expressed as: 1-(1-alpha)(1/3)=27.67exp-44 010/(RT)t.
Other AbstractA novel process was proposed for treating nickeliferous laterite ores with molten sodium hydroxide. The effect on silicon extraction caused by the factors, such as stirring speed, reaction temperature, particle size and NaOH-to-ore mass ratio, was investigated. The results show that increasing stirring speed, reaction temperature and NaOH-to-ore mass ratio while decreasing particle size increases silicon extraction rate. The desiliconization kinetics of nickeliferous laterite ores in molten sodium hydroxide system was described successfully by chemical reaction control model. The activation energy of the desiliconization process was found to be 44.01 kJ/mol, and the reaction rate based on a chemical reaction-controlled process can be expressed as: 1-(1-α)~(1/3)= 27.67exp-44 010/(RT)t.
KeywordNICKEL DEPOSIT nickeliferous laterite ores sodium hydroxide silicon dioxide kinetics desiliconization
Indexed ByCSCD
Language英语
Funding Project[National Basic Research Program of China]
CSCD IDCSCD:3843212
Citation statistics
Cited Times:14[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/149016
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
GB/T 7714
Mu Wenning,Zhai Yuchun. Desiliconization kinetics of nickeliferous laterite ores in molten sodium hydroxide system[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2010,20(2):330-335.
APA Mu Wenning,&Zhai Yuchun.(2010).Desiliconization kinetics of nickeliferous laterite ores in molten sodium hydroxide system.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,20(2),330-335.
MLA Mu Wenning,et al."Desiliconization kinetics of nickeliferous laterite ores in molten sodium hydroxide system".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 20.2(2010):330-335.
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