Journal of Guangxi Normal University(Natural Science Edition) ›› 2015, Vol. 33 ›› Issue (1): 109-114.doi: 10.16088/j.issn.1001-6600.2015.01.018

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Preparation of Polyaluminum Chloride with Coal Gangueand Calcium Aluminate

ZHANG Xiang1, CHEN Miao1, DUAN Jian-bang1, LI Rui-ge2, ZAI Ting-ting1, WANG Jing-tao1   

  1. 1.School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou Henan 450001,China;
    2. School of Chemical Engineering, Xiangtan University, Xiangtan Hunan 411100,China
  • Received:2014-09-23 Online:2015-03-15 Published:2018-09-17

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Abstract: The Al2O3 leaching rate of coal gangue could reach 85% after it was calcined at 750 ℃. The coal gangue reacted with 20% hydrochloride acid, after that, the calcium aluminate was added into the pickle liquor. Solid PAC product with 28% Al2O3 content and about 68% basicity was obtained, which was in line with the national standard GB/T 22627-2008 and was confirmed as the target product by IR. The optimum drying temperature of PAC was determined to be 150～200 ℃ as the result of thermogravimetric analysis.

Key words: coal gangue, calcium aluminate, polyaluminum chloride, leaching rate, basicity

CLC Number: 

  • TQ314.253
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