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Efficient gas-based shaft furnace direct reduction iron making system and method

A gas-based shaft furnace, direct technology, applied in shaft furnaces, furnaces, furnace types, etc., can solve problems such as insufficient circulation, affecting shaft furnace efficiency, and restricting gas-based shaft furnace process progress, so as to improve work efficiency and reduce Environmental pollution, the effect of reducing production costs

Active Publication Date: 2019-01-11
中晋冶金科技有限公司
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Problems solved by technology

[0004] In the existing gas-based shaft furnace, on the one hand, the outlet direction of the furnace top gas is usually parallel to the horizontal direction. During the production process, the pellet material is likely to enter the furnace top gas scrubber together with the furnace top gas, and at the same time, it will restrict the shaft furnace The height of the inner material affects the efficiency of the shaft furnace; on the other hand, the concept of recycling is available, but the degree of recycling is not enough to make full use of the furnace top gas and minimize environmental pollution, which still restricts the direct reduction of the gas-based shaft furnace. iron crafting progress

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  • Efficient gas-based shaft furnace direct reduction iron making system and method
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  • Efficient gas-based shaft furnace direct reduction iron making system and method

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Embodiment Construction

[0026] In order to better understand the technical solutions of the present invention, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0028] Terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a", "said" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0029] figure 1 It is a schematic structural di...

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Abstract

The invention provides an efficient gas-based shaft furnace direct reduction iron making system and method and relates to the technical field of gas-based direct reduction iron making. Furnace top gascan be utilized as reducing gas and carburizing gas / cooling gas to reduce, cool / carburize pellets in a shaft furnace to improve the working efficiency of the shaft furnace. The system comprises thegas-based shaft furnace, a washing device, a gas production device and a reforming device. The gas-based shaft furnace is connected with the washing device. The gas production device and the washingdevice are connected and integrated and are then divided into a first pipeline and a second pipeline, wherein the first pipeline is sequentially connected with the reforming device and a reducing section, and the second pipeline is connected with a cooling / carburizing section. The method is that the top gas discharged from the top of the gas-based shaft furnace is processed and then returns to the gas-based shaft furnace to be used as reducing gas, cooling gas and / or carburizing gas to participate in the direct reduction iron making process. The technical scheme of the efficient gas-based shaft furnace direct reduction iron making system and method is suitable for the direct reduction iron making process of the gas-based shaft furnace.

Description

【Technical field】 [0001] The invention relates to the technical field of gas-based direct reduction ironmaking, in particular to an efficient gas-based shaft furnace direct reduction ironmaking system and method. 【Background technique】 [0002] Direct reduced iron, also known as sponge iron, is solid metal iron obtained by reducing iron ore under solid conditions, which is mixed with gangue components in the ore. High-purity high-quality sponge iron has the function of diluting harmful elements in steel and reducing the content of gases and inclusions. It is an indispensable impurity diluent for short-process steelmaking in electric furnaces, and is also indispensable for special steels such as pure steel and high-quality steel in electric furnaces. Impurity diluent and ferrous raw material, as well as the best coolant, energy-carrying material and iron source for converter steelmaking. The direct reduction ironmaking process can be divided into gas-based and coal-based acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/02
CPCC21B13/0073C21B13/02Y02P10/143
Inventor 吴志军鲁庆张建良刘征建
Owner 中晋冶金科技有限公司
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