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Blast furnace top gas supply system

A gas supply system and blast furnace technology, applied in blast furnaces, blast furnace details, blast furnace parts and other directions, can solve problems such as affecting production stability, production equipment failures, and increasing pig iron costs, achieving simple structure, increasing calorific value, and reducing The effect of operating costs

Inactive Publication Date: 2013-08-21
CISDI ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above process needs to consume a lot of nitrogen, which increases the cost of pig iron, especially for some iron and steel enterprises with insufficient nitrogen supply, the lack of nitrogen or the fluctuation of nitrogen pressure often cause production and equipment failure, which greatly affects production stability

Method used

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  • Blast furnace top gas supply system
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  • Blast furnace top gas supply system

Examples

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no. 1 example

[0035] Such as figure 1 Shown is a schematic structural view of the first embodiment of the blast furnace top gas supply system of the present invention. The top gas supply system of the blast furnace in this embodiment includes a top nitrogen system for supplying nitrogen to the top of the blast furnace and a top gas system arranged in parallel with the top nitrogen system and used for supplying gas to the top of the blast furnace, and the top A switching device for switching and selecting the gas supply source to the top of the blast furnace is provided between the gas system and the top nitrogen system.

[0036] Such as figure 1 As shown, the furnace top gas system in this embodiment includes a gas main pipe connected to the gas supply system, and the gas main pipe includes a gas primary pressure equalization passage 4 connected to the material tank 1 and a pressurized cooling system for pressurizing the gas. Cooling passage 5, pressurization The cooling passage 5 is prov...

no. 2 example

[0046] Such as figure 2 Shown is a schematic structural view of the second embodiment of the blast furnace top gas supply system of the present invention. The top gas supply system of the blast furnace in this embodiment includes a top nitrogen system for supplying nitrogen to the top of the blast furnace and a top gas system arranged in parallel with the top nitrogen system and used for supplying gas to the top of the blast furnace, and the top A switching device for switching and selecting the gas supply source to the top of the blast furnace is provided between the gas system and the top nitrogen system. Such as figure 2 As shown, the furnace top gas system in this embodiment includes a gas main pipe connected to the gas supply system, and the gas main pipe includes a gas primary pressure equalization passage 4 connected to the material tank 1 and a pressurized cooling system for pressurizing the gas. Cooling passage 5, pressurization The cooling passage 5 is provided w...

no. 3 example

[0051] Such as image 3 Shown is a schematic structural view of the third embodiment of the blast furnace top gas supply system of the present invention. The top gas supply system of the blast furnace in this embodiment includes a top nitrogen system for supplying nitrogen to the top of the blast furnace and a top gas system arranged in parallel with the top nitrogen system and used for supplying gas to the top of the blast furnace, and the top A switching device for switching and selecting the gas supply source to the top of the blast furnace is provided between the gas system and the top nitrogen system. Such as image 3 As shown, the furnace top gas system in this embodiment includes a gas main pipe connected to the gas supply system, and the gas main pipe includes a gas primary pressure equalization passage 4 connected to the material tank 1 and a pressurized cooling system for pressurizing the gas. Cooling passage 5, pressurization The cooling passage 5 is provided with...

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Abstract

The invention discloses a blast furnace top gas supply system which comprises a furnace top nitrogen system for supplying nitrogen to a blast furnace top and a furnace top coal gas system which is connected in parallel with the furnace top nitrogen system and is used for supplying coal gas to the blast furnace top, wherein a switch device for switching and selecting a blast furnace top gas supply source is arranged between the furnace top coal gas system and the furnace top nitrogen system. According to the blast furnace top gas supply system disclosed by the invention, since the furnace top coal gas system is arranged in parallel with the existing furnace top nitrogen system and the switch device is arranged between the furnace top nitrogen system and the furnace top coal gas system, coal gas or nitrogen can be independently supplied to the blast furnace top according to the actual working conditions, or coal gas and nitrogen can be supplied to the blast furnace top at the same time, a sufficient gas source to the blast furnace top and normal operation of the equipment can be guaranteed, the nitrogen consumption can be reduced or canceled, the calorific value of the blast furnace coal gas can be increased, and the blast furnace top gas supply system can be implemented by transforming the existing furnace top gas supply system.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a blast furnace top gas supply system. Background technique [0002] In the process of blast furnace ironmaking production, nitrogen is generally used to maintain the normal operation of some key equipment in the blast furnace top system, mainly including: using high-pressure nitrogen to seal and assist the cooling of the furnace top distributor, using high-pressure nitrogen to cool the top material The tank is used for pressure equalization, and nitrogen is used for cooling when the temperature of the valve box under the furnace roof is high. The above process needs to consume a large amount of nitrogen, which increases the cost of pig iron, especially for some iron and steel enterprises with insufficient nitrogen supply, the lack of nitrogen or the fluctuation of nitrogen pressure often causes production and equipment failures, which greatly affects production st...

Claims

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Application Information

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IPC IPC(8): C21B7/00
CPCC21B7/20C21B7/007F27D1/02F27D3/0033F27D3/18F27D7/02
Inventor 郑军邹忠平熊拾根陈凌王亮
Owner CISDI ENG CO LTD
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