铝酸钡与氢氧化钡脱硫过程比较.pdf

2012年11期
有色金属(冶烁部分)(hLp:/ysyl. bgrimm.cn)
23
doi:10.3969/j.issn.1007-7545.2012.11.007
铝酸钡与氢氧化钡脱硫过程比较
张念炳2,黎志英3,丁形2
(1.贵州师范大学材料与建筑工程学院,贵阳550014;
2.贵州省铝电解炭素材料工程技术研究中心,贵阳550001;
3.贵州大学材料与治金学院,贵阳550003)
摘要:用铝酸钡和氢氧化钡对种分母液进行脱硫试验,对脱硫渣进行XRD分析,并比较脱硫过程。结
果表明,氢氧化钡的脱硫效果更好,脱硫完成时间更短,速率更快;铝酸钡先与碱液反应生成2BaO?
A12O。·5H2O,再与硫碱和碳碱反应,而氢氧化钡直接与硫碱和碳碱反应,脱硫过程均可用未反应核模
型描述。
关键词:铝酸钡;氢氧化钡;脱硫;种分母液;未反应核模型
中图分类号:TF821文献标识码:A文章编号:1007-7545(2012)11-0023-03
Comparison of Barium Aluminate and Barium
Hydroxide Desulfurization Process
ZHANG Nian-bing, LI Zhi-ying, DING Tong
(1. College of Material and Civil Engineering, Guizhou Normal University, Guiyang 550001, China,
2. Guizhou Engineering Research Center for Carbon Materials of Aluminum Electrolytic, Guiyang 550001. China i
3. The Materials and Metallurgical College, Guizhou U]niversity, Guiyang 550003, China)
Abstract: The seed precipitation liquor was desulfurized with barium aluminate and barium hydroxide re
spectively. The desulfurization slag was characterized by XRD analysis, and the desulfurization process
was compared. The results show that barium hydroxide exceeds barium aluminate with better desulfuriza-
tion in terms of effect,, speed and duration. In the desulfurization process with barium aluminate, 2 Ba0
AL, O, . 5H,O is firstly produced in the reaction of barium aluminate with alkali, and then it reacts with
sodium sulfate and sodium carbonate. To compare, Ba(OH)2 8H2 O directly reacts with sodium sulfate
and sodium carbonate in the desulfurization process with barium hydroxide. Both of desulfurization reac-
tion processes can be described with"shrinking core model"
Key words: barium aluminate; barium hydroxide; desulfurization; seed precipitation liquor; shrinking core
我国已探明的髙硫型铝土矿中57.2%是高品法5?及湿法-等。湿法脱硫对铝酸钠溶液起到
位铝土矿1-1,在采用拜耳法生产氧化铝时需解决净化作用,提高生产能力,脱硫效果好,设备简单,环
硫的危害。常用脱硫方法有浮选法3-、预焙烧境污染小。但铝酸钡与氢氧化钡脱硫过程的行为至
收稿日期:2012-03-19
基金项自:贵州省科学技术基金项目(黔科合J字[20112038);贵州省教育庁自然科学研究项目(黔教科2010015)
贵阳市科技计划项目(筑科合同[2011101]1-42)
作者简介:张念炳(1980-),男,贵州绥阳人,副教授,博士