RECOVERY OF ALKALI IN RED MUD USING CO2

被引：0

作者：

Wang, Qi ^{[1
]}

Luan, Zhaokun ^{[1
]}

Peng, Xianjia ^{[1
]}

Shi, Li ^{[1
]}

机构：

[1] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China

来源：

FRESENIUS ENVIRONMENTAL BULLETIN | 2009年 / 18卷 / 12期

关键词：

red mud; alkali; recovery; carbon dioxide; environmental protection; suspension and carbonation method; BAUXITE RESIDUE; CARBONATION; WATER;

D O I：

暂无

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Recovery of alkali (sodium salt mainly) from red mud by direct carbonation in CO2 water solutions under different conditions was studied. The process was based on the reaction of alkali with CO2-water solutions to convert the alkali in red mud to more soluble sodium bicarbonate. The carbonation experiments were carried out in a three-phase mechanically agitated slurry-bed reactor. The influence of parameters, such as reaction temperature, reaction time, liquid/solid ratio and CO2 flow-rate, on the alkali recovery rate was investigated. The optimal reaction conditions are as follows: reaction temperature is 60 degrees C, reaction time is 1.5 h, liquid/solid ratio is 10, CO2 flow velocity is 0.8 L/min.

引用

页码：2345 / 2351

页数：7

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