Integrated steel fabrication system and method for integrated steel fabrication

An integrated system and integrated method technology, applied in the field of eco-friendly integrated systems, can solve problems such as insufficient molten iron, achieve the effects of reducing pollutants, reducing pollutants, and solving heat shortages

Inactive Publication Date: 2015-09-30
POSCO
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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

Method used

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  • Integrated steel fabrication system and method for integrated steel fabrication
  • Integrated steel fabrication system and method for integrated steel fabrication
  • Integrated steel fabrication system and method for integrated steel fabrication

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Embodiment Construction

[0051] The present invention will now be specifically described. In the present invention, the term "integrated system and method for manufacturing steel" means a steelmaking system and method including a process of producing molten iron from iron ore and a process of producing molten steel from molten iron. The integrated steel manufacturing system of the present invention can be described in two steps: an ironmaking process to prepare molten iron, and a steelmaking process to prepare molten steel.

[0052] In the ironmaking process, molten iron is prepared by reducing fine iron ore using smelting reduction equipment (smelting furnace). Specifically, fine iron ore is reduced by fluidization and sintered, and then molten iron is prepared by further reducing the sintered reduced fine iron ore in a melting furnace. However, as described above, the amount of molten iron that can be produced in a melting furnace is insufficient compared to the amount of molten iron that can be pr...

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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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Application Information

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IPC IPC(8): C21B13/14
CPCC21B13/002C21B13/0033C21B13/0086C21B13/143C21C5/285C21C5/34C21C5/35C21C5/5217C21C5/562C21B2100/60Y02P10/20C21B13/14
Inventor 郑俊阳权五俊朴晟浩金东洙朴钟洙崔镇植金城演金度亨白赞浚李宗桓
Owner POSCO
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