Recovery Process of Decomposed Zirconium from Zirconium Metallurgical Slag

被引：0
|
作者：
Liu F. [1 ]
Chen W. [1 ]
Yan S. [1 ]
Bai B. [1 ]
Jiang D. [2 ]
机构：
[1] College of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot
[2] Zhejiang Zirconium Valley Technology, Huzhou
来源：
Xiyou Jinshu/Chinese Journal of Rare Metals | 2017年 / 41卷 / 07期
关键词：
Acid leaching; Recovery of zirconium; Zirconium metallurgical slag;
D O I：
10.13373/j.cnki.cjrm.XY16012301
中图分类号：
学科分类号：
摘要：
Zirconium decomposed in alkali fusion process from metallurgical slag was recycled by hydrochloric acid leaching. The effect of hydrochloric acid concentration, acid leaching temperature, liquid-solid ratio and other process parameters on the recovery rate of zirconium decomposed during alkali fusion was analyzed, and the phase composition of zirconium metallurgical slag, the existence form of zirconium in zirconium metallurgical slag before and after recycling, and the recycling process were studied. The results indicated that hydrochloric acid concentration and acid leaching temperature had a great influence on recovery rate. The recovery rate of zirconium decomposed in metallurgical slag increased when the hydrochloric acid concentration increased. When the acid concentration increased from 2 to 4 mol·L-1, the growth of recovery rate was only 4.02%. The recovery rate of zirconium decomposed in metallurgical slag rose as the temperature rose. When the leaching temperature was more than 50℃, the recovery rate of zirconium decomposed in metallurgical slag had no significant growth. Zirconium in metallurgical slag existed in two main forms ZrSiO4, ZrOCl2. The ZrOCl2 recycling could be realized in hydrochloric acid. The best technology conditions were as follows: leaching temperature of 50℃, hydrochloric acid concentration of 2 mol·L-1, liquid solid ratio of 5:1. The recovery rate of soluble zirconium was up to 62% with the optimal conditions. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.
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页码：831 / 836
页数：5
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