摘要
考察了赤泥液固质量比、反应温度、搅拌转速对二氧化硫吸收率和赤泥脱碱率的影响.同时,考察了二氧化硫吸收率与时间的关系.实验结果表明:从二氧化硫吸收率和赤泥脱碱率两方面考虑,拜耳赤泥吸收低浓度SO2的适宜条件为:液固质量比5∶1,搅拌转速150r/min,反应温度25℃;此时,SO2吸收率为93.14%,尾气中SO2的浓度达到国家排放标准,二氧化硫吸收率随时间的增长而降低;赤泥的脱碱率为70.45%,此时脱碱赤泥的碱度达到水泥的碱度要求,可作为原料生产水泥.
The effects of the liquid/solid ratio and reaction temperature of Bayer red mud and stirring speed on the absorption rate of sulfur dioxide and dealkalization rate of red mud were investigated, as well as the relationship between time and absorption rate of sulfur dioxide. The result showed that the optimal conditions on which the absorption rate of low-concentration SO2 is 93.14% are the liquid/solid ratio 5: 1, stirring speed 150 r/min and reaction temperature 25 ℃, with the SO2 concentration in tail gas conforming to the National Discharge Standard. The absorption rate of SO2 decreases with prolonging time. Meanwhile, the dealkalization rate of red mud is 70.45 %, i. e., the dealkalized red mud is available to be a raw material for cement production.
出处
《东北大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2010年第7期986-989,共4页
Journal of Northeastern University(Natural Science)
基金
辽宁省青年人才基金资助项目(2005221012)
教育部高等学校博士学科点专项科研基金资助项目(20050145029)
国家重点基础研究发展计划项目(2007CB613504)
关键词
拜耳赤泥
低浓度二氧化硫
脱碱率
吸收率
泥浆化
Bayer red mud
low concentration SO2
dealkalization rate
absorption rate
sludging