Processes study on magnetization roasting method to strengthen whitening kaolin by magnetic separating removal iron method

被引：0
作者：
Xia, Guang-Hua [1 ]
Chen, Yi-Bin [1 ]
He, Chan [1 ]
Zhou, Xiang-Yu [1 ]
Zhang, Xiao-Lin [1 ]
机构：
[1] School of Material Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen
来源：
Gongneng Cailiao/Journal of Functional Materials | 2015年 / 46卷 / 03期
关键词：
Calcined whiteness; Iron removal; Kaolin; Magnetic roasting; Wet milling;
D O I：
10.3969/j.issn.1001-9731.2015.03.031
中图分类号：
学科分类号：
摘要：
The experiment used magnetic roasting process, took bamboo charcoal powder that was dealt with base activator as magnetic roasting reducing agent. It studied that additive, sintering temperature, and holding time had some effects on mass susceptibility of iron mineral in kaolin. Determined finally the best solution of magnetic roasting process was that it was added 2.0% boric acid and 3.0% NaHCO3, its magnetic roasting temperature was about 450℃, its holding time was 30 min, and mass susceptibility of iron mineral in kaolin reached 5.58×10-4 m3/kg. To kaolin after treatment of magnetic roasting process, it was necessary to deal with it by wet milling. When the pH value in the slurry system was about 9 and milling time was about 30 min. The production rate of magnetic separation was up to 84.4%. And this time the calcined whiteness of magnetic kaolin concentrate (Temperature was 1200℃) was 87.4%. It increased by 22.6% than calcined whiteness 71.3% of untreated kaolin sample, it increased by 14.2% than calcined whiteness 76.5% of original kaolin sample. ©, 2015, Journal of Functional Materials. All right reserved.
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页码：03144 / 03147
页数：3
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