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Ultralow-carbon-consumption blast furnace smelting process and blast furnace smelting system

A blast furnace smelting, ultra-low carbon technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of high carbon consumption and poor carbon reduction effect, and achieve the effect of reducing energy consumption and reducing the amount of injection into the blast furnace

Pending Publication Date: 2022-07-15
CISDI ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide an ultra-low carbon consumption blast furnace smelting process and a blast furnace smelting system, which are used to solve the problem of high carbon consumption and carbon reduction effect in the iron and steel smelting production process in the prior art. bad question

Method used

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  • Ultralow-carbon-consumption blast furnace smelting process and blast furnace smelting system
  • Ultralow-carbon-consumption blast furnace smelting process and blast furnace smelting system
  • Ultralow-carbon-consumption blast furnace smelting process and blast furnace smelting system

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Experimental program
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Effect test

Embodiment 1

[0070] see figure 2 and Image 6 , the blast furnace smelting system of this embodiment includes a blast furnace 1, a gravity precipitator 21, a dry precipitator 22, a desulfurization device 31, a pressurization device 32, a decarburization device 33, a denitrification device 34, a coal gas electric heating device 4, and other conventional Similar to blast furnace top system, slag treatment system, various public and auxiliary facilities, etc. Among them, the gravity precipitator 21, the dry precipitator 22, the desulfurization device 31, the pressurizing device 32, the decarburization device 33, the denitrification device 34, and the coal gas electric heating device 4 are connected in sequence, and the gravity precipitator 21 and the coal gas electric heating device 4 are connected in sequence. Both are connected to blast furnace 1.

[0071]In the present embodiment, the technological process of ultra-low carbon consumption blast furnace smelting process is as follows:

...

Embodiment 2

[0086] see image 3 and Figure 7 , the blast furnace smelting system of this embodiment includes a blast furnace 1, a gravity precipitator 21, a dry precipitator 22, a desulfurization device 31, a pressurization device 32, a decarburization device 33, a denitrification device 34, a coal gas electric heating device 4, an oxygen-enriched device The air electric heating device 5 and the furnace top system, slag treatment system, various public and auxiliary facilities, etc. similar to the conventional blast furnace. Among them, the gravity precipitator 21, the dry precipitator 22, the desulfurization device 31, the pressurizing device 32, the decarburization device 33, the denitrification device 34, and the coal gas electric heating device 4 are connected in sequence, and the gravity precipitator 21, the coal gas electric heating device 4 And the oxygen-enriched air electric heating device 5 is connected to the blast furnace 1 .

[0087] In the present embodiment, the process ...

Embodiment 3

[0105] see Figure 4 and Figure 8 , the blast furnace smelting system of this embodiment includes a blast furnace 1, a gravity precipitator 21, a dry precipitator 22, a desulfurization device 31, a pressurizing device 32, a decarburization device 33, a denitrification device 34, a coal gas electric heating device 4 and other conventional Similar to blast furnace top system, slag treatment system, various public and auxiliary facilities, etc. Among them, the gravity precipitator 21, the dry precipitator 22, the desulfurization device 31, the pressurizing device 32, the decarburization device 33, the denitrification device 34, and the coal gas electric heating device 4 are connected in sequence, and the gravity precipitator 21 and the coal gas electric heating device 4 are connected in sequence. Both are connected to blast furnace 1.

[0106] In the present embodiment, the process flow of the ultra-low carbon consumption blast furnace smelting process is as follows:

[0107]...

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Abstract

The invention relates to the technical field of low-carbon environmental protection in the iron and steel industry, in particular to an ultralow-carbon-consumption blast furnace smelting process and a blast furnace smelting system. The ultra-low carbon consumption blast furnace smelting process comprises the following steps: adding mixed furnace charge and coke into a blast furnace to produce molten iron, wherein the mixed furnace charge comprises conventional furnace charge and novel furnace charge; according to the method, furnace top gas generated in the blast furnace ironmaking process is sequentially subjected to dust removal, quality improvement and electric heating treatment to obtain treated furnace top gas, and the treated furnace top gas is sprayed into a blast furnace; pulverized coal and oxygen-enriched air are injected into the blast furnace; wherein during the electric heating treatment, the furnace top gas is electrically heated to 950-1250 DEG C. The device has the beneficial effects of increasing the amount of furnace top gas circularly injected into the blast furnace, reducing the amount of pulverized coal injected into the blast furnace, reducing the primary energy consumption of the blast furnace and achieving a good carbon reduction effect.

Description

technical field [0001] The invention relates to the technical field of low carbon environmental protection in the iron and steel industry, in particular to an ultra-low carbon consumption blast furnace smelting process and a blast furnace smelting system. Background technique [0002] my country's iron and steel industry annual CO 2 The emission is about 1.8 billion tons, accounting for more than 15% of my country's total carbon emissions. The implementation of low-carbon steel smelting will be the only way. The carbon emissions of the entire ironmaking process account for about 85% of the entire iron and steel process, so carbon reduction in ironmaking is the top priority. [0003] At present, the subsequent application of top gas produced by traditional long-process blast furnace smelting is mainly based on combustion, including various heating (such as hot blast stove, heating furnace, etc.) and power generation. During the combustion process, the gas contains about 23%...

Claims

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Application Information

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IPC IPC(8): C21B5/00C21B5/06
CPCC21B5/00C21B5/001C21B5/002C21B5/003C21B5/06
Inventor 肖学文王刚侯世锋赵运建邹忠平郑军熊拾根牛群何茂成许俊贺坤李牧明
Owner CISDI ENG CO LTD