Introduction to the Results: By adding a pore-forming agent to the red mud produced from aluminum oxide to improve the surface porosity of the desulfurizer, a binder is used to enhance the mechanical strength of the desulfurizer, and an active agent is employed to strengthen the catalytic action of the desulfurizer. A desulfurizer product for removing SO2 from flue gas is produced and used for the removal of SO2 from flue gas. This not only eliminates the hazards of red mud but also addresses the severe over-standard issue of SO2 emissions from thermal power plants, thus having significant economic and social benefits. Technical specifications of this process: The synthesized red mud desulfurizer is used for the removal of SO2 from flue gas. In a desulfurization bed layer thickness of 14cm-20cm, with a flue gas SO2 concentration of 2000 g/m3-3000mg/m3, gas velocity of 300h-1-400 h-1, desulfurization temperature of 60℃-80℃, and desulfurization time of 70h-100h, the desulfurization rate is 99%-90%. Characteristics of this technology: This technology establishes the quality indicators for red mud desulfurizer. The technology utilizes aluminum oxide industry waste—red mud as a resource to produce desulfurizers for industrial flue gas desulfurization. It can not only reduce the emissions of red mud, decrease the pressure on storage, and correspondingly reduce dam construction costs, but also prevent excessive SO2 emissions from self-owned power plants, thus protecting the atmospheric environment. It has significant social and environmental benefits. The project has broad prospects for promotion and application in existing aluminum oxide factories or coal-fired power plants in China. Project cooperation willingness: This technology can provide feasibility report compilation, technology transfer, and engineering design. Project investment is determined based on the scale of the factory.