Purifying agent for complex pellet flue gas

The invention discloses a purifying agent for complex pellet flue gas, and belongs to the technical field of complex pellet flue gas purification in the iron and steel industry. The purifying agent comprises 70-80 wt% of pulverized coal, 5-8 wt% of a suspending agent, 10-13 wt% of tar, 3-6 wt% of high-temperature asphalt and 2-3 wt% of titanium dioxide nanotubes. Preparation, mixing, profiling, carbonization, spraying and standing, activation and the like are carried out to obtain the efficient purifying agent. The efficient purifying agent is high in micropore rate and large in specific surface area, the problems of complex pellet flue gas desulfurization, denitration and heavy metal removal are solved, the problems of dioxin removal, F<-> removal and Cl<-> removal are solved, multi-pollution synergistic purification is achieved, valuable sulfur resources are recycled, and the efficient purifying agent can adapt to fluctuation of flue gas flow and pollutant concentration. The efficient purifying agent is adopted to replace the existing test case for treating the complex pellet flue gas with the active carbon, such that the efficient purifying agent has characteristics of high micropore volume, high desulfurization and denitration efficiency, and high F<-> and Cl<-> removal efficiency.