The invention relates to a method and a device for making iron by
smelting reduction. The method for making iron by
smelting reduction comprises the following steps: putting
raw material forming matters into a
smelting ironmaking device; heating and reducing the
raw material forming matters into metallic iron; after the reduced
metalation rate of various oxides of iron reaches 40-95 percent in rawmaterials, heating and melting products of a reducing furnace; and producing direct reduction
molten steel or molten iron produced by the similar
blast furnace. The raw materials comprise a breath shell or a half-breath shell or an opening shell or the combination of the raw materials, a
coating shells of the breath shell, the half-breath shell and the opening shell is prepared by adding an
adhesive in
calcium oxide or
calcium carbonate or
calcium carbide or the combination of the materials. The device for making iron by smelting reduction comprises an arc furnace, a buried arc furnace, a converter, an
induction furnace, and the like. After reduction products are heated and melted, and
oxygen or
inert gas is blown into the arc furnace in order to remove
slag. Due to the adoption of a shell
coating technology, the method and the device effectively prevent from oxidizing reduced matters in the process, avoid bonding formed matters for contact and are combined with blowing gas and are good for making
slag.
Slag iron has good separation effect, and the produced iron and steel products have good quality.