Method for producing sponge iron and zinc-rich materials by blast furnace zinc-containing ash

A method for producing sponge iron and zinc-rich materials by blast furnace zinc-containing ash belongs to the technical field of the comprehensive utilization of steel mill wastes. The method comprises the preparation process: reducing blast furnace zinc-containing ash in a rotary kiln so as to obtain the zinc-rich materials, synchronously crushing the cooled iron slag, and then separating the iron-rich materials from the slag by magnetic separation, wherein the CO volume concentration in the gas of the rotary kiln meets the condition that CO/(CO2+CO) is more than 70%, and the temperature of the gas in the kiln is 1150 DEG C to 1300 DEG C; the water content when the blast furnace zinc-containing ash is fed in the kiln is 10wt% to 30wt%; the mass content of carbon in the furnace material component fed into the rotary kiln is not less than 20wt%; in the slag ion mixture obtained by the reducing in the rotary kiln, the reducing rate of iron is not lower than 85% and the metal iron particle size is not less than