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In recent years, with people’s high attention on the shortage of resources and global warming issues, the recovery, fixation, utilization, and reuse on CO2 emissions will come to be the most important issues of environment and energy in the 21th century. Integrated iron and steel works are major carbon dioxide emissions sources. Among them, CO2 accounted for about 15%-21% in limekiln tail gas, which is of great recycle value as below-blowing mixing gas in the process of steel-making in converter.By comparison and analyse of several CO2 recovery technologies, the paper finally selected the method of alcohol amine chemical absorption to proceed CO2 recovery research in limekiln exhaust.The test chose the widely-used monoethanolamine technology （MEA）and a new technology, alkanolamine technology （HAX）, and conducted field tests respectively. The performance parameters under different industrial condition, such as absorbency, purification extent, renewable capacity, recovery rate, corrosion rate, and so on, were tested. The results indicated that both of the two technologies could meet the technologic requirements that not only the purity of CO2 gas needs to be more than 95%, but also the recovery rate needs to be more than 80%. Compared with MEA technology, the absorbency of HXA solution was improved by 6%-60%, heat loss in reuse was reduced by 23%, corrosion rate was reduced by 60%, had a better anti-oxidative performance, and the degradation rate with CO2 was reduced more than 80%.Meanwhile, the paper adopted the HAX technology to make a design of industrial devices for the CO2 recovery technology of limekiln tail gas in Baoshan iron and steel company, which was developed from this research. It finished the enactment of the main performance parameters of the whole technology, the selection of system devices, and the establishment of correlative assistant facilities. It also made investment estimations for the technology in single item and the whole part, analyzing the economy of using CO2, recovered the technology, as a substitute for the below-blowing mixing gas （argon gas）in the process of steel-making in converter.
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