A blast furnace tuyere and method for enlarging its inlet diameter

A technology with the largest diameter and the air outlet, which is applied in the direction of the air outlet, etc., to prevent jamming, prevent the installation position from drifting, and avoid difficult replacement.

Inactive Publication Date: 2011-12-14
张昭贵
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, if the 201110221318.9 patent application technology is to be implemented without changing the diameter of the existing blast furnace tuyere assembly surface, it is impossible to implement the above-mentioned existing method of enlarging the tuyere inlet diameter.

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  • A blast furnace tuyere and method for enlarging its inlet diameter
  • A blast furnace tuyere and method for enlarging its inlet diameter
  • A blast furnace tuyere and method for enlarging its inlet diameter

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Embodiment Construction

[0022] Such as figure 1 It is Embodiment 1 of the present invention, and is a typical embodiment of the direct tuyeres of small and medium-sized blast furnaces.

[0023] Such as figure 2 It is embodiment 2 of the present invention, and it is a typical embodiment of inclined tuyeres of large and medium-sized blast furnaces.

[0024] Such as figure 1 , 2 Among them, the assembly surface 1 of the blast furnace tuyere is located at the middle and rear part of the tuyere, and its external dimensions are exactly the same as those of the existing tuyere assembly surface. figure 1 , 2 Among them, the maximum diameter of the assembly surface 1 is Φ, the distance between the maximum diameter and the rear end surface 7 of the tuyere is L1, the length of the second half of the tuyere channel 2 is L2, and the total length of the tuyere channel is L; the diameter of the tuyere inlet 6 is Φ1, and the tuyere The outlet diameter of the second half of the channel 2 is Φ2, the inlet diamet...

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Abstract

The blast furnace tuyere proposed by the present invention expands the diameter of the tuyere inlet without changing the external dimensions of the existing tuyere assembly surface, so as to meet the technical requirements of installing a pulverized coal pre-combustion device in the tuyere channel. Without any modification, it is convenient to popularize and apply the tuyere pulverized coal enhanced combustion technology on blast furnaces at all levels to increase the amount of coal injection and the combustion rate of pulverized coal. The method for enlarging the diameter of the tuyere inlet proposed by the present invention is to extend the rear end surface of the tuyere and the tuyere inlet simultaneously, so that the distance between the rear end surface of the tuyere and the maximum diameter of the tuyere assembly surface reaches 150-250mm; at the same time, the distance between the tuyere inlet The diameter should be enlarged by at least 20-40mm on the original basis.

Description

technical field [0001] The invention belongs to the technical field of blast furnace ironmaking, and relates to a blast furnace tuyere suitable for strengthening pulverized coal combustion and a method for enlarging its inlet diameter. Background technique [0002] Chinese patent application 201110221318.9 discloses a method and device for intensifying combustion of pulverized coal injected into a blast furnace in a tuyere. It installs a pulverized coal pre-combustion device in the second half of the tuyere channel, injects the pulverized coal into the central channel of the pulverized coal pre-combustion device, mixes with a small amount of hot air and pre-combusts, and then sprays the coal powder in the front half of the tuyere channel. In the section, it forms coaxial flow and diffusion combustion together with most of the hot air, and finally enters the blast furnace for full combustion. This patent application technology can greatly increase the amount of coal injected...

Claims

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Application Information

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IPC IPC(8): C21B7/16
Inventor张昭贵
Owner张昭贵