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Method for maintaining blast furnace taphole

A technology of iron mouth and blast furnace, which is applied in the direction of blast furnace, blast furnace details, blast furnace parts, etc., can solve the problems of poor treatment effect, affecting the normal production of blast furnace, single maintenance method, etc., achieve short maintenance time, reduce gas leakage, and operate simple effect

Active Publication Date: 2010-11-24
WUHAN WINNING TECH +1
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AI Technical Summary

Problems solved by technology

[0003] The current maintenance method is relatively simple, mainly in the following two types: 1. Replace the mud sleeve; 2. Grout the hole around the iron hole.
These treatment methods did not fundamentally find the cause of the problem, and the treatment effect was not good, which affected the normal production of the blast furnace

Method used

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  • Method for maintaining blast furnace taphole
  • Method for maintaining blast furnace taphole
  • Method for maintaining blast furnace taphole

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Embodiment Construction

[0018] Below in conjunction with accompanying drawing and specific embodiment the present invention is further described, not limiting to protection scope:

[0019] A maintenance method for a blast furnace taphole. It is maintained according to the following steps:

[0020] Step 1: Remove the iron gate protection plate, first clean the iron grooves on both sides of the iron gate to the center line of the iron gate, then clean the iron gate mud sleeve to the surface of the iron gate composite brick, and then clean the dust in the iron gate frame 1 with the Debris cleaned up;

[0021] Step 2: Select a steel plate with a thickness of 30-40mm to make the blind plate 3, such as figure 1 with figure 2 As shown, first make grooves around the edges of the steel plate, then open a hole in the center of the steel plate, and weld a short grouting tube 2 with an outer diameter of 50 mm at the hole to obtain a blind plate 3; The blind plate 3 is welded to the iron mouth frame 1;

[0...

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Abstract

The invention relates to a method for maintaining a blast furnace taphole. The technical scheme is that the method comprises the following steps of: cleaning iron runners on two sides of the taphole, a mud sleeve and a taphole frame 1, welding a blind plate 3 to the taphole frame, grouting a grouting nozzle stub on the blind plate 3 by adopting a thermoplastic phenolic resin bonded hard press-in material, standing for 1 to 1.2 hours, detaching the blind plate 3, and cleaning up the grouting material in the taphole; welding a baffle plate 5 to the taphole frame, and pouring an iron runner castable; and respectively opening a grouting hole on a left cross joint, a right cross joint and a vertical joint on the taphole cooling wall, and grouting each grouting hole until the pressure is 4.5 to 5MPa. The method has the characteristics of good treatment effect, reduction of gas leakage in a blast furnace taphole area and guarantee of normal production of the blast furnace.

Description

technical field [0001] The invention relates to the technical field of blast furnace maintenance. Specifically relates to a method for maintaining a blast furnace taphole. technical background [0002] After the blast furnace has been in production for a period of time, due to the influence of factors such as masonry quality, refractory material performance, and production operations, various degrees of gas leakage, fire escape, and burn-through will occur in the iron mouth, which is difficult to maintain for the iron mouth of the blast furnace. In one area of ​​the blast furnace, the main reason for the occurrence of gas leakage and fire in the iron mouth area of ​​the blast furnace is the formation of a channel for gas leakage. The formation of the gas leakage channel is usually caused by the following reasons: (1) When the blast furnace is tapping, the iron hole composite brick will crack under the repeated impact of the mud gun, and the repeated impact of the iron hole ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/12
Inventor 李新健唐坤张忠珣刘忠江
Owner WUHAN WINNING TECH
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