Catalyst for high-humidity sintering flue gas as well as preparation method and application of catalyst

The invention provides a catalyst for high-humidity sintering flue gas and a preparation method and application thereof, the catalyst takes mullite honeycomb ceramic as a carrier, and catalytic active components copper oxide and cerium oxide are loaded on the carrier. The preparation method of the catalyst comprises the following steps: pretreating the carrier, preparing an active component solution, impregnating the mullite honeycomb ceramic, drying and roasting. The catalyst for the high-humidity sintering flue gas is applied to selective oxidation removal of CO in the sintering flue gas, the volume content of water vapor in the sintering flue gas is 8 vol%-20 vol%, and the volume content of CO is 0.3 vol%-1.2 vol%. According to the invention, CO in flue gas is efficiently and stably removed under the conditions of high humidity and low CO, and experiments prove that the catalyst disclosed by the invention can still keep a relatively high and stable CO conversion rate under the condition that the water cont