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A method for blocking the leakage of gas from the base gas cover of a large blast furnace

A blast furnace and gas technology, which is applied in the field of blocking gas leaks in large blast furnace base gas enclosures, to achieve obvious sealing effects, reduce maintenance engineering costs, and shorten the shutdown time

Active Publication Date: 2018-07-13
MCC5 GROUP SHANGHAI CORPORATION LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, the known blast furnace shut down and wind down to prevent gas from jumping up and leaking and plugging treatment methods have the above-mentioned inconveniences and problems

Method used

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  • A method for blocking the leakage of gas from the base gas cover of a large blast furnace
  • A method for blocking the leakage of gas from the base gas cover of a large blast furnace

Examples

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Embodiment 1

[0038] A method for blocking gas leakage from a large-scale blast furnace base gas cover, characterized in that it includes the gas cover sealing treatment and the grouting treatment steps from the gas cover to the tuyere section:

[0039] see now figure 1 and 2 , figure 1 It is a schematic structural view of a large blast furnace and a furnace-based gas enclosure in an embodiment of the present invention, figure 2 for figure 1 Enlarged view of part A in the middle.

[0040] (1) The sealing treatment of the gas cover includes the following steps:

[0041] a. Drill a hole of 150mm*Ø25mm at an interval of 1000mm on the outer concrete foundation of the gas enclosure at a distance of 100mm from the enclosure facade steel plate in the circumferential direction. Drill 220mm*Ø20mm expansion bolts in each hole;

[0042] b. Make an arc-shaped steel plate with a width of 150mm and a thickness of 8mm. The arc of the arc-shaped steel plate is consistent with the arc of the gas encl...

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Abstract

The invention discloses a method for blocking gas spurt leakage of a gas enclosing cover on a furnace foundation of a large-sized blast furnace. The method is characterized by including a blocking treatment step of the gas enclosing cover and a grouting treatment step of the gas enclosing cover to a wind gap section, namely (1) the gas enclosing cover is subjected to blocking treatment and (2) a grouting mode is adopted for treatment from the gas enclosing cover to the wind gap section. The method for blocking gas spurt leakage of the gas enclosing cover on the furnace foundation of the large-sized blast furnace has the advantages that a plastic sealing material is pressed into the gap between a furnace shell and a refractory material through a grouting hole formed in a furnace body by the adoption of a blast furnace body grouting blocking technology, the gap between the furnace shell and a ramming material inside the furnace can be filled completely, and the purpose of stopping gas from inter-leaking into the gas enclosing cover is achieved; and one part is constructed in blast furnace production, and then the other part is constructed after the blast furnace is subjected to blowing out and damping down, so that damping-down time is shortened, the sealing effect on the blast furnace body is obvious, blowing-out and damping-down time of the blast furnace is short, and the overhauling engineering cost is reduced.

Description

technical field [0001] The invention relates to a method for blocking gas leakage, in particular to a method for blocking gas leakage from a base gas cover of a large blast furnace. Background technique [0002] The 5800m³ blast furnace in the ironworks has been put into operation for more than 5 years, and the blast furnace is running stably. In recent years, there have been a large number of gas leakage and combustion phenomena in the gas enclosure of the blast furnace base, which has caused great harm to the production of the blast furnace. Through the field understanding, it is generally believed that the expansion of the furnace body caused the gas cover of the furnace base and the concrete foundation to crack, and the gas in the furnace leaked through the cracks in the carbon material in the furnace to the cracks in the lower part of the gas cover of the furnace base and overflowed. In order to ensure the normal production of the blast furnace, the bottom gas leakage ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00
Inventor 任社安
Owner MCC5 GROUP SHANGHAI CORPORATION LIMITED
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