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Tuyere assembly and molten iron manufacturing equipment using the tuyere assembly

A technology for manufacturing equipment and tuyere, applied in tuyere, sustainable manufacturing/processing, blast furnaces, etc., can solve problems such as abnormal furnace conditions, increased fuel loss, and reduced air permeability and liquid permeability of melting and gasifiers, achieving improved The effect of combustion efficiency

Active Publication Date: 2016-06-08
浦项股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] As mentioned above, if the combustion focus distance is not sufficiently shortened, but moving away from the front end of the tuyeres to the center of the swirl area will lead to an increase in the amount of auxiliary fuel leaving the swirl area before full combustion, so that unburned auxiliary fuel will be deposited in the furnace. question
[0010] If the amount of unburned auxiliary fuel increases, not only the amount of fuel loss will increase, but also the air permeability and liquid permeability in the melter gasifier will decrease, which will lead to abnormal furnace conditions that will deteriorate the condition of the furnace

Method used

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  • Tuyere assembly and molten iron manufacturing equipment using the tuyere assembly
  • Tuyere assembly and molten iron manufacturing equipment using the tuyere assembly
  • Tuyere assembly and molten iron manufacturing equipment using the tuyere assembly

Examples

Experimental program
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Effect test

Embodiment 1

[0144] use as figure 1 The tuyere assembly shown consists of two-pieces, injecting pulverized coal as auxiliary fuel into the melter-gasifier. Pulverized coal is sprayed into the melter-gasifier through the fuel injection pipe of the tuyere assembly. In addition, pure oxygen gas is sprayed into the melter-gasifier through the gas injection channel of the tuyere assembly. The fuel injection pipe is divided into a first pipe and a second pipe, wherein the second pipe is formed in a straight line, so that when the fuel injection pipe is arranged in the tuyere, the first pipe located in the small tuyere can also be enlarged relative to the gas passage. the inclination. The first pipe forms an acute angle of 7.5 degrees with the gas channel, and the combustion focus where pulverized coal and oxygen meet is 270mm away from the inner front end of the tuyere.

[0145] On the other hand, since the second pipe is formed in a straight line, the pulverized coal flow path passing throug...

Embodiment 2

[0147] use as image 3 The tuyere assembly shown consists of two-pieces, injecting pulverized coal as auxiliary fuel into the melter-gasifier. The pulverized coal is sprayed into the melter gasifier through the fuel injection pipe of the tuyere assembly. In addition, pure oxygen gas is sprayed into the melter-gasifier through the gas injection channel of the tuyere assembly. The fuel injection pipe is divided into a first pipe and a second pipe, wherein the second pipe is bent into an arc shape, so that when the fuel injection pipe is arranged in the tuyere, the distance between the first pipe at the small tuyere and the gas passage can also be increased. slope. The first pipe forms an acute angle of 7.5 degrees with the gas channel, and the combustion focus where pulverized coal and oxygen meet is 270mm away from the inner front end of the tuyere. The second pipe of the fuel injection pipe is formed in a curved shape, and the replacement cycle of the fuel injection pipe ca...

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Abstract

The invention provides a tuyere assembly and molten iron manufacturing equipment using the tuyere assembly. The provided tuyere assembly of the molten iron manufacturing equipment includes: a gas channel for injecting oxygen-containing gas into the melting gasifier; a fuel injection pipe, which is set separately from the gas channel, and injecting auxiliary fuel into the melting gasifier, Wherein the fuel injection pipe includes two pipes connected to each other. The tuyere assembly of the invention can shorten the combustion focus distance and improve the combustion efficiency of the auxiliary fuel, and can minimize the abrasion of the injection pipe caused by the auxiliary fuel.

Description

technical field [0001] The present invention relates to a molten iron manufacturing equipment, more particularly to a tuyere assembly with an injection pipe for injecting auxiliary fuel to a melter-gasifier and a molten iron manufacturing equipment using the tuyere assembly. Background technique [0002] Recently, a smelting reduction method capable of replacing the blast furnace method has been developed. In the smelting reduction method, ordinary coal is directly used as fuel and reducing agent, and iron ore is directly used as iron source. In the smelting reduction method, a reduction reactor for reducing iron ore and a melter-gasifier for melting iron ore are provided separately. Therefore, iron ore is reduced by a reducing gas in a reducing reactor, and then melted in a melter-gasifier to produce molten iron. [0003] Oxygen is injected into the melter-gasifier to combust the coal-packed bed within the melter-gasifier. The tuyere assembly for injecting oxygen is inst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B13/00
CPCC21B5/001C21B5/003C21B5/026C21B7/163C21B13/002C21B13/0066C21B13/143C21B2100/60Y02P10/134C21B13/00
Inventor 崔应洙许金植裴辰灿
Owner 浦项股份有限公司
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