The invention belongs to the field of
metallurgy, and provides a
chromium ore pellet pre-reduction direct-supply submerged arc furnace
system, which comprises a pelletizer, a chain grate and a pre-reduction
rotary kiln, wherein the material inlet of the pelletizer is connected with a material preparing unit through a belt, the material outlet of the pelletizer is connected with the material inlet of the chain grate, the material outlet of the chain grate is connected with the material inlet of the pre-reduction
rotary kiln, the material outlet of the pre-reduction
rotary kiln is connected with a submerged arc furnace, and the pelletizer, the chain grate and the pre-reduction rotary
kiln are arranged on the place 30-50 m far away from the ground. According to the method of the present invention, the cooling process during the oxidized pellet production process is eliminated, and the direct hot material feeding-into-furnace process is adopted, such that the
secondary energy source consumption is reduced, and the hot charging direct-supply can be achieved; the pelletizer, the chain grate and the pre-reduction rotary
kiln are arranged by adopting the high frame, the highest place is 50 m, and the hot material is directly supplied to the submerged arc furnace; and the hot material-cold material exchange can be achieved, the whole production achieves the flexible regulation, and the passive situation that the furnace stops along with the
kiln stopping and the kiln stops along with the furnace can be avoided.