The invention relates to a method and equipment for producing high-quality
sponge iron for reduced
iron powder. The method comprises the steps of: preparing composite solidified
pellets by
iron ore concentrate
powder; mixing the composite solidified
pellets or iron stones with a
solid reducing agent, adding the mixture into a
shaft furnace reaction chamber of a combined reaction tank;
heating furnace burdens at a preheating section in the
reaction chamber to 800-900 DEG C, and then at a reducing section to 1100-1200 DEG C to carry out reduction reaction for 12-18h; cooling the reacted materials through a cooling section, and then enabling the materials to enter a rolling screening
system through a frequency control discharging
system for online screening; after screening, conveying the waste
reducing agent to a storage bin through a vacuum negative-pressure suction
system; and carrying out different normal aftertreatments on the
sponge iron obtained by screening according to used different raw materials to obtain the reduced
iron powder or a
sponge iron
briquette. According to the method and the equipment for producing the high-quality sponge iron for the reduced
iron powder, the production process is automatically controlled, the
mechanization degree is high, the labor intensity of workers is reduced, the production environment is improved, the sponge iron
pellets and the
reducing agent are separated by the automatic screening and vacuum negative-pressure suction systems, a part of reducing agent is recycled, and thus the
energy consumption is reduced.