Research on red mud-limestone modified desulfurization mechanism and engineering application

With the increasingly stringent emission standards of flue gas, a demonstration project of desulfurizing by red mud-limestone process was established to make the flue gas meet the Emission Standards of Pollutants for Aluminum Industry. As shown by the detection results, the emission concentration of Sulfur dioxide (SO2) was less than 50 mg/m3, and the particulate pollutant was less than 10 mg/m3, which realized the ultra-low emission of flue gas pollutants in a cheap and efficient way. In addition, the desulfurization mechanism was analyzed by laboratory comparative experiments and characterization analysis of engineering samples. Furthermore, the advantages and disadvantages of the red mud-limestone process are analyzed. Compared with other desulfurization processes, the red mud-limestone process is a reliable process for desulfurization of flue gas from calcination.

Automated summary

The demonstration project of desulfurizing by red mud-limestone process successfully achieved ultra-low emission of flue gas pollutants in a cheap and efficient way, with sulfur dioxide emission concentration less than 50 mg/m3 and particulate pollutants less than 10 mg/m3. The desulfurization mechanism, as well as the advantages and disadvantages of the red mud-limestone process, were analyzed through laboratory experiments and characterization analysis of engineering samples.