The invention discloses a method and a
system for co-
processing waste
incineration fly ash and
zinc-containing dust mud of a
steel mill. The method comprises the following steps: 1, adding 1.5% of
lime and pulverized
coal into the
fly ash and the dust mud according to the slagging
alkalinity of 1.1-1.3, the total carbon content of 2-8% and the binder ratio of 2-5% for proportioning, wherein the
fly ash accounts for 5-20% of the dust mud; 2, adding water into the mixture, extruding into blocks or
pelletizing, and curing until the strength meets the requirement; 3, adding the agglomerates or
pellets into a
rotary kiln, and introducing high-temperature
coal gas to pre-reduce the agglomerates or
pellets in the
kiln; 4, continuously adding the pre-reduced agglomerates or
pellets into a smeltingreduction furnace, and meanwhile distributing main fuel such as nut
coke within the range of the material surface
radius of the
smelting reduction furnace; blowing hot air with the
oxygen concentration of 35% from a
tuyere of a reduction furnace, and spraying pulverized
coal through the
tuyere; and carrying out further indirect reduction,
softening melting and FeO-C final reduction on the pre-reduced pellets in a
coke bed in the reduction furnace to generate molten iron and furnace
slag. According to the main purpose, the fly ash is cooperatively treated and utilized by combining the advantages of a metallurgical furnace for treating
zinc-containing dust according to the chemical components of the fly ash.