The invention relates to a process and a device for
smelting chromium irons and
chromium-containing molten iron by using
chromium ore
powder, which belongs to
metallurgical industry steel-making
raw material. The process comprises the following steps: mixing chromium iron containing raw materials with
reducing agent,
solvent and catalyst to prepare
ultra fine powder, mixing to make
pelletizing materials, sending the
pelletizing materials into a reducing furnace, obtaining chromium irons
pellets after the reduction reaction, and directly adding reduced
pellets into a lining electroslag furnace for being smelted into the chromium-iron
alloy or the chromium-containing molten iron. The device comprises an internal-external heating vertical reducing furnace, a lining electroslag furnace and a residual heat
recovery system. The invention has the advantages that: firstly, the reduction temperature is low, the speed is high, the
energy consumption is reduced, the production cost is lowered, the production efficiency is high, and the uniformity of the quality is good; secondly, the degree of
mechanization is high, the procedure is simple, the yield is large, the
mass production can be performed; thirdly, the waste of raw materials is reduced, the environment
pollution is lowered; fourthly, the source of raw materials adopting the chromium ore
powder and chromium-containing waste, the cost is low; fifthly, the waste resource can be recycled so as to save the
resource consumption; and sixthly, the high-temperature
pellets are directly smelted by adopting the lining electroslag furnace, the heat efficiency is high, the
energy consumption is low, the material purity is high and the quality is good, and the device is simple with less investment.