Pohang Iron & Steel Co. Ltd.

Research Institute of Industrial Science & Technology

Voest-alpine Industrieanlagenbau Gmbh

Yoon Chul Park

Young Chae Jung

Sang Deok Lee

Dong Joon Min

An apparatus for manufacturing molten iron by using a calcination furnace, and a manufacturing method therefor are disclosed. A high temperature reducing gas (1000 to 1100&deg; C.) from a melter gasifier is used as a calcination heat in a calcination furnace so as to cool the high temperature reducing gas to the optimum reduction temperature (800 to 850&deg; C.), and so as to supply the cooled reducing gas to a shaft furnace, whereby the manufacture of the molten iron can be efficiently carried out, and a high thermal efficiency is realized even without a separate gas cooling device. Therefore, a separate cooling device for cooling the hot reducing gas of the melter gasifier is not required. Further, the hot reducing gas is naturally cooled at the calcination furnace, and therefore, the thermal efficiency of the hot reducing gas of the melter gasifier is maximized. Further, a separate water-using cooler and a separate compressor are omitted, and therefore, the molten iron manufacturing facility is simplified.

Apparatus for manufacturing molten iron by using calcination furnace, and manufacturing method therefor

A method for agglomerating iron ore particles pre-reduced to produce hot pig iron, wherein hot iron ore particles pre-reduced in the pre-reduction furnace are simply mixed with aluminum powder or aluminum-containing metal powder before being loaded in the smelting reduction furnace so that they will be agglomerated, thereby being capable of not only simplifying the agglomeration, but also eliminating the adverse effect on the quality of ingot iron caused by impurities such as S or P. Aluminum dross, which is a waste, may be used as the aluminum-containing metal powder for agglomerating the iron ore particles. In this case, a reduced energy consumption and disposal of wastes can be achieved.

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Pohang, South Korea

Yoon Chul Park