Deep tail gas purification method for fuming furnace

The invention relates to a deep tail gas purification method for a fuming furnace and belongs to the technical field of environmental engineering. Ammonia water and hydrogen peroxide serve as desulfurizers to successively work in a combined manner to realize deep purification of SO2 in tail gas of the fuming furnace, the SO2 absorption capacity at the front section is relatively large while the SO2 absorption reaction at the rear section is quick, ammonia-acid absorption mother liquor and a sulfuric acid solution are byproducts, the ammonia-acid absorption mother liquor is used for producing solid ammonium sulfate, the sulfuric acid solution returns to the front-section process for reuse, no liquid waste liquor is produced, the SO2 concentration in the treated tail gas is smaller than 50 mg/Nm , 100% up-to-standard tail gas emission is realized, the raw materials are easy to purchase, the process is simple and the operation is convenient.