基于酸浸法去除水泥窑用后砖中氯化钾的研究

doi:10.11896/cldb.20040150

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Abstract In order to efficiently remove potassium chloride present in the magnesia-iron-aluminum spinel bricks used in cement kilns, and realize the industrial applications of refractory materials used in cement kilns, this article mainly uses different acid solutions such as nitric acid, formic acid, oxalic acid, and citric acid to soak the bricks for cement kilns, and explores the effect of different acid solutions on the removal of potassium chloride in the bricks for cement kilns. Through the analysis of the sample composition, phase composition and microscopic surface scan analysis after treatment, it was found that the acid solution is beneficial to the diffusion and dissolution of potassium chloride, and the organic carboxylic acid can accelerate the potassium chloride’s hydrolytic ionization and promotes the removal of potassium chloride. The citric acid solution has the best effect of removing potassium chloride. The materials treated by the citric acid solution meet the standard requirement that the chloride (calculated as chloride ion content) in the national standard for light aggregates is not more than 0.02%, and the treated materials can be reused in industrial production.

Key words： cement kilns used refractories leaching of potassium chloride diffusion complexation reaction

Published: 25 June 2021

CLC number:	X705
	TQ175.9

Fund:This work was financially supported by the National Key Technology R&D Program during the Twelfth Five-year Plan Period (2013BAE03B00) and National Training Program of Innovation and Entrepreneurship for Undergraduates (201810146106).

About author:: Xiaodong Jia, a graduate student at Liaoning Univer-sity of Science and Technology, is mainly engaged in the research of refractory recycling and new material synthesis.Lin Tian obtained her M.E. degree from the University of Science and Technology Liaoning (USTL) and served in School of Materials and Metallurgy, USTL till now. She presides over 9 provincial and municipal and enterprise projects, participates in 2 major national special projects, and 20 other provincial and municipal level and enterprise projects. She is mainly engaged in the research and development of refractory materials, with a focus on refractory materials for new metallurgical technologies. She has published more than 20 journal papers and won 3 provincial scientific research awards and 3 municipal scientific research awards.

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	JIA Xiaodong
	TIAN Lin
	GAO Wei
	CHEN Shujiang
	LI Guohua

Cite this article:

JIA Xiaodong,TIAN Lin,GAO Wei, et al. Research on Removal of Potassium Chloride from Brick Used in Cement Kilns by Acid Leaching[J]. Materials Reports, 2021, 35(11): 11034-11038.

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http://www.mater-rep.com/EN/10.11896/cldb.20040150 OR http://www.mater-rep.com/EN/Y2021/V35/I11/11034

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