Integrated steelmaking system and integrated steelmaking method

Abstract

The present invention relates to an integrated steelmaking system and an integrated steelmaking method, and more specifically to an eco-friendly integrated steelmaking system and an eco-friendly integrated steelmaking method which can remarkably reduce the amount of environmental contaminants generated in a raw material treatment process and a steelmaking process, and can reduce the consumption of energy. The integrated steelmaking system according to one aspect of the present invention may comprise: an iron-making apparatus further comprising a reductive fine iron ore manufacturing apparatus which comprises first fluidized reduction furnace equipment and second fluidized reduction furnace equipment configured to manufacture reductive fine iron ores by reducing fine iron ores in at least one fluidized reduction furnace respectively included in first and second fluidized reduction furnace equipment, first and second pelletizing apparatuses configured to manufacture pelletized and reduced iron by being respectively supplied with the reduced fine iron ores from the first fluidized reduction furnace equipment and the second fluidized reduction furnace equipment and pelletizing the reduced fine iron ore, and a melting furnace for manufacturing molten iron by melting the pelletized and reduced iron pelletized in the first pelletizing apparatus; a steelmaking apparatus for manufacturing molten steel by being supplied with the molten iron and the pelletized and reduced iron manufactured from the iron-making apparatus; and a continuous rolling apparatus in which a casting step and a rolling step are directly connected when casting and rolling the molten steel manufactured in the steelmaking apparatus

Description

technical field [0001] The present disclosure relates to an integrated steelmaking system and method, and more particularly, to an environmentally friendly integrated steelmaking system and method designed to consume less energy and significantly reduce raw material processing Environmental pollutants in process and ironmaking processes. Background technique [0002] Generally, molten iron is produced in a blast furnace, and molten steel is produced through a refining process in a reformer using molten iron as a main raw material. [0003] A method for producing molten iron with higher energy efficiency and productivity than a blast furnace has not been developed so far. However, this blast furnace process requires coke obtained from a specific kind of coal as a carbon source that functions as a fuel and a reducing agent, and generally requires sintered ore obtained through a series of agglomeration processes as an iron source. [0004] That is, the current blast furnace m...

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Problems solved by technology

[0009] In addition, according to the general steelmaking method, since casting and rolling are carried out separately, a large site is required to establish the continuous casting workshop and the rolling workshop separately

Furthermore, in this case, the steel strip produced by the casting process can be cooled and then reheated for the rolling process (called cold charge rolling (CCR)), and therefore, due to the increased energy consumption due to reheating

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