高硫煤还原磷石膏反应中SO_2浓度影响因素  

Effect Factors of SO_2 Concentration on the Reduction Reaction of Phosphogypsum by High-sulphur Coal

作　　者：张慧娜[1] 杨月红[1] 宁平[1] 方祖国[1] 杨永宏[1] 欧根能[1] 张伟[1] 

机构地区：[1]昆明理工大学环境科学与工程学院,昆明650093

出　　处：《武汉理工大学学报》2010年第5期113-115,128,共4页Journal of Wuhan University of Technology

基　　金：国家高科技发展计划("863"计划)(2007AA06Z321);云南省自然科学基金(2006E0023Q)

摘　　要：为了探讨高硫煤还原磷石膏生成SO2的反应机理,通过热重分析等手段,对连续升温条件下不同C/SO3比和不同高硫煤粒径对SO2浓度的影响进行了研究。实验结果表明：用高硫煤还原磷石膏可以大大提高SO2浓度,在700-800℃和1 000-1 100℃时SO2浓度出现了2个峰值,与磷石膏煅烧产生的SO2浓度比较,最大分别提高了25.55%和42%;〈800℃时较强的还原气氛有利于SO2的生成,反之;在700-800℃时高硫煤粒径对SO2浓度的影响最显著,SO2浓度最大相差约15%;SO2浓度随着粒径的减小呈先减小后增大的趋势。Thermogravimetry and other ways were used for studying the reaction mechanism of SO2 concentration on the reaction of phosphogypsum reduced by highsulphur coal.Several studies are conducted on the trends of SO2 concentration of under the following conditions：phosphogypsum reduced by high-sulphur coal can improved the SO2 concentration greatly,at the 700～800 ℃ and 1 000～1 100 ℃,two peaks of SO2 concentration showed up,and compared with phosphogypsum,the SO2 concentration was increased 25.55% or 42% respectively;when the temperature less than 800 ℃,undering the stronger reducing atmospheres are good for produing SO2,and the situation was opposite when the temperature more than 800 ℃;at 700～800 ℃,the granularity of high-sulphur coal was affected by SO2 concentration most obviously,and there was about 15% at most;the smaller the granularity of high-sulphur coal was,the lower the SO2 concentration was produced firstly,and then was more and more.

关 键 词：高硫煤 磷石膏 SO2 硫酸联产水泥 

分 类 号：X51[环境科学与工程—环境工程]