Integrated steel fabrication system and method for integrated steel fabrication

Abstract

According to an aspect of the present invention, there is provided an integrated system for manufacturing steel comprising: a reduced fine iron ore manufacturing apparatus for reducing fine iron ore to manufacture reduced fine iron ore, the apparatus comprising a first fluidized furnace apparatus and Second fluidized furnace units, each comprising at least one fluidized furnace; respectively for receiving reduced fine iron ore from the first fluidized furnace unit and the second fluidized furnace unit and sintering it to produce agglomerated A first sintering device and a second sintering device for reduced iron; an iron making device including a melting furnace for melting reduced iron sintered in the first sintering device and producing molten iron; and for receiving iron produced in the iron making device A steelmaking plant that reduces iron from molten iron and sintering and prepares molten steel.

Description

technical field [0001] The present invention relates to an integrated system and method for manufacturing steel, and more particularly, to an eco-friendly manufacturing of steel that consumes less energy and significantly reduces environmental pollutants during raw material handling and ironmaking integrated systems and methods. Background technique [0002] Generally, molten iron is prepared in a blast furnace, and molten steel is prepared in a converter using the molten iron as a main material through a refining process. A molten iron refining method with higher energy efficiency and productivity than the blast furnace method has not been developed. However, this blast furnace method requires coke obtained from a specific type of coal as a carbon source as a fuel and a reducing agent, and generally requires sintered ore obtained through a series of sintering processes as an iron source. [0003] In other words, the current blast furnace method requires equipment for prim...

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Problems solved by technology

[0006] However, compared with the amount of molten iron that can be prepared by a large blast furnace such as a blast furnace capable of producing three to four million tons of molten iron per year, the amount of molten iron that can be prepared by this coal-based smelting reduction method with a unit smelting reduction facility still not enough

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