Iron removal method for waste SCR catalyst recovery carrier, iron removal carrier and application

The invention provides a deferrization method for a waste SCR (Selective Catalytic Reduction) catalyst recovery carrier, which comprises the following steps: (1) adding an inducer and an alkali solution into the waste SCR catalyst recovery carrier to carry out modification reaction, and then carrying out solid-liquid separation to obtain a first liquid and a first solid serving as a modified material; (2) adding an acid solution into the first solid obtained in the step (1) to adjust the pH value of the system, then adding a reducing agent and a complexing agent into the system to carry out a complexation reaction, and then carrying out solid-liquid separation to obtain a second liquid and a second solid used as an iron removal material; and (3) sequentially cleaning, drying and calcining the second solid obtained in the step (2) to obtain the deferrization carrier. The invention also provides the obtained deferrization carrier and application thereof. According to the iron removal method, iron in the waste S