Apparatus for manufacturing molten irons

Abstract

An apparatus for manufacturing molten iron according to an exemplary embodiment of the present invention includes i) at least one fluidized-bed reduction reactor that converts iron ore into reduced materials by reducing and plasticizing the iron ore, ii) a melter-gasifier into which the reduced materials are charged and oxygen is injected such that the melter-gasifier manufactures molten iron, and iii) a reducing gas supply line that supplies a reducing gas discharged from the melter- gasifier into the fluidized-bed reduction reactor. The fluidized-bed reduction reactor includes a gas injector that injects a gas into the fluidized-bed reduction reactor to remove stagnating layers.

Description

technical field [0001] The invention relates to a device for producing molten iron using powdered ore in a smelting reduction process. The device prevents the fine ore from accumulating between the lower part and the inner wall of the fluidized bed reduction reactor to form a stagnant layer, which disturbs the air flow and reduces the reaction efficiency. Background technique [0002] The steel industry is a core industry that provides the basic materials needed to build and manufacture the cars, boats, appliances and many other products we use. The iron and steel industry is also one of the oldest industries that have progressed together with mankind. In iron foundries that play a pivotal role in the steel industry, after producing molten iron (pig iron in a molten state) using iron ore and coal as raw materials, steel is smelted from the molten iron and supplied to consumers. [0003] Currently, about 60% of the world's iron products are manufactured by using the blast f...

AI Technical Summary

Problems solved by technology

It also leads to a vicious circle of further disturbances in the flow of fines and gas

Therefore, the normal function of the fluidized bed reduction reactor is seriously reduced

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