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	Orthogonal experiments for kaolin bleaching by using sodium dithionite and sulfuric acid
	Li, Jin Tang ; Zeng, Xue ; Gan, Chuan Hai ; Qiu, Shi ; Chen, Rong Yi ; Luo, Xue Tao ; Li JT(李锦堂) ; Luo XT(罗学涛)
	2014
关键词	Bleaching Cleaning Experiments Liquids Metallurgy Sodium
英文摘要	Conference Name:3rd International Conference on Metallurgy Technology and Materials, ICMTM 2014. Conference Address: Kunming, China. Time:April 25, 2014 - April 26, 2014.; The quality of the kaolin is always measured by iron contents since this element gives undesirable reddish color which limits the usage of this type of minerals. Reducing the iron contents to increase the value of kaolin by bleaching process is investigated. The effects of factors which can improve the whiteness of kaolin have been studied. The dosage of sodium dithionite, pH value, solid-to-liquid ratio and reaction time were chose as factors based on mono-factor experimental results. Orthogonal experiments were carried out and the optimum processing conditions of the reductive bleaching were obtained as the dosage of sodium dithionite 3%, pH 2, solid-to-liquid ratio 1:3 and reaction time 45min. After bleaching process described above, we obtained a great improvement in the whiteness from 69.93% to 81.31% and a decrease of Fe2O3 content from 0.52% to 0.40% of the kaolin. ? (2014) Trans Tech Publications, Switzerland.
语种	英语
出处	http://dx.doi.org/10.4028/www.scientific.net/AMR.968.116
出版者	Trans Tech Publications Ltd
内容类型	其他
源URL	[http://dspace.xmu.edu.cn/handle/2288/85144]
专题	材料学院－会议论文
推荐引用方式 GB/T 7714	Li, Jin Tang,Zeng, Xue,Gan, Chuan Hai,et al. Orthogonal experiments for kaolin bleaching by using sodium dithionite and sulfuric acid. 2014-01-01.

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