化工环保2025，Vol.45Issue(2)：261-267,7.DOI:10.3969/j.issn.1006-1878.2025.02.014
烟气CO2赤泥湿法脱碱研究
Wet dealkalinization of red mud using flue gas CO2
摘要
Abstract
Red mud is a strongly alkaline industrial solid waste produced by alumina enterprises.The strong alkalinity of the mud not only poses a serious threat to the ecological environment but also hinders the resource utilization of the red mud.Based on laboratory research,a small pilot test platform with a treatment scale of 10 L was built,and industrial flue gas was simulated to carry out the study on the wet dealkalization of red mud by flue gas CO2.The experimental results show that under the condition of room temperature and a solid-liquid mass ratio of 1∶20,when the simulated flue gas with a CO2 volume fraction of 10%and CO2 flow rate of 0.20 m3/h is fed into red mud slurry with CaCl2 additive(Ca2+addition amount 1%(w))for 30 min,the dealkalization effect is the best.The pH of red mud slurry is reduced to 6.70,and the Na+removal rate in the solid is 16.3%.The Na+dissolution rate in the supernatant is 1.33,and the CO2 absorption rate is 31.52 g/kg.The organic combination of wet dealkalization of red mud by flue gas CO2 with the existing production process of alumina enterprises can provide a new idea for the exploration of collaborative treatment technology for carbon emission reduction and solid waste reduction in enterprises.关键词
赤泥/烟气CO2/碳减排/脱碱效果Key words
red mud/flue gas CO2/carbon emission reduction/dealkalization effect分类
环境科学引用本文复制引用
李玉荣,杨欢,覃小刚,庄原发,胡世磊,邓毅..烟气CO2赤泥湿法脱碱研究[J].化工环保,2025,45(2):261-267,7.基金项目
国家重点研发计划项目(2022YFB4102103). （2022YFB4102103）
