Method for rapidly processing bend loss tuyere small sleeve of blast furnace

A technology of small cover and bending damage of the air outlet, applied in the direction of the air outlet, can solve the problems of difficult disassembly, serious deformation, bending damage, etc., and achieve the effect of reducing the wind rest time and reducing the replacement.

Active Publication Date: 2015-05-13
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

②Severe bending loss: the heat load rises sharply, and the furnace wall falls off, causing the small set of tuyeres below the area to be damaged and run out of air
[0010] 6. If there is still air leakage after treatment, use compressed air or external water for cooling depending on the degree, and when replacing the warped small tuyere sleeve after the normal program stops the wind, the warped small tuyere sleeve is seriously deformed and difficult to disassemble, resulting in replacement The time of the small tuyere is extended, which affects the production of the blast furnace and the difficulty of recovery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0015] Example: Three water guns are prepared before the wind-off operation (aligned with the water supply and drain pipe flanges of the small air outlet and fixed, and the other one is used as a spare). Standing on the front of the small air outlet is strictly prohibited.

[0016] 1. Reduce the water volume of the small tuyere to 300L / min, and the hot air volume to 5000m 3 / min (the water volume in normal production is 600~630L / min);

[0017] 2. When the hot air volume is reduced to 3000-3500m3 / min, switch the water supply and drainage of the small tuyere to the bypass state, (first open the No. 3 bypass water inlet valve and the No. 6 bypass water return valve, and then close the No. 1 water inlet valve, No. 2 inlet valve, No. 4 return valve, and No. 5 valve return valve). (Note: No. 1, 2, and 3 water inlet valves of blast furnaces, and No. 4, 5, and 6 water return valves are auxiliary valves of blast furnaces.)

[0018] 3. Use a water gun to draw water from the outside of...

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PUM

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Abstract

The invention discloses a method for rapidly processing a bend loss tuyere small sleeve of a blast furnace and belongs to the field of blast furnace iron making, wherein the bend loss tuyere small sleeve is processed by water closing and melting loss during the damping down process under a hot air pressure of 80-100 KPa. The method for rapidly processing bend loss tuyere small sleeve of a blast furnace can achieve the aims of immediately processing the bend loss tuyere small sleeve, reducing the time of changing tuyere small sleeve and relieving the difficulty of replacing the tuyere small sleeve, thereby shortening the damping down time, weakening the labor strength of the manual operation and reducing the yield loss.

Description

technical field [0001] The invention belongs to the field of blast furnace ironmaking, and relates to a method for quickly treating small sets of warped tuyeres of blast furnaces. Background technique [0002] In the process of blast furnace production, it is required to achieve long-term stable operation, especially in the production of high coal ratio and low coke ratio. If it is too thick, there will be a vicious production accident caused by a small set of tuyeres being damaged, and the blast furnace needs to be shut down immediately for replacement, so as to avoid the expansion of the accident and prevent secondary accidents. The concept of the warp loss of the tuyere small sleeve means that during the production process, the tuyere small sleeve sinks and the warp loss occurs due to the large area of ​​furnace wall slag peeling off. [0003] Judgment basis for the warping damage of the small tuyere sleeve: ①Small warping loss: Observing from the sight glass, it is foun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/16
CPCC21B7/16
Inventor 唐顺兵王红斌赵新民王建军郑伟
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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