Other

Research Institute of Industrial Science & Technology

Voest-alpine Industrieanlagenbau Gmbh

Pohang Iron & Steel Co. Ltd.

Min Young Cho

Myoung Kyun Shin

Sang Hoon Joo

Jun Hyuk Lee

Sang Deuk Lee

Hang Goo Kim

Il Ock Lee

Heung Won Kang

Young Chae Jung

Dael Whei Lee

Young Che Chung

Dal Hoi Lee

An apparatus and a method for manufacturing molten pig iron by using a fine iron ore are disclosed. Coal is used to produce a reducing gas, and a fine iron ore is used to produce a molten iron and a reduced iron in a simple and efficient manner. The apparatus for manufacturing a molten iron by directly using coal as the fuel is as follows. A high temperature reducing gas is sent from a melter-gasifier to a fluidized bed lime stone calcining furnace to calcine the lime stone. The reducing gas is supplied to a second fluidized bed reducing furnace so as to manufacture a reduced iron directly. An off-gas from the second fluidized bed reducing furnace is supplied to a first fluidized bed reducing furnace (disposed above the second fluidized bed reducing furnace) to pre-heat and pre-reduce the fine iron ore. The calcined lime stone and the finally reduced iron are supplied to a melter-gasifier to manufacture a molten pig iron.

Apparatus for manufacturing molten pig iron and reduced iron by utilizing a fluidized bed

Disclosed is a method for increasing the charring ratio of coal. In manufacturing an ingot iron using the coal, magnesium oxide or limestone is used as an additive for charring the coal. The additive increases the charring ratio of the coal while giving no affection onto slag. An MgO suspension or limestone suspension is mixed with the coal and thus obtained mixture is dried to attach MgO or the limestone onto the surface of the coal. The charring effect is increased and the using amount of coke can be reduced.

Method for increasing the charring ratio of coal

Smelting-reduction apparatus and method for producing molten pig iron

Method for manufacturing coal agglomerates for use in direct iron

Growing community of inventors

Pohang, South Korea

Min Young Cho