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A method for repairing the cooling water pipe of the stave of a blast furnace, its structure, and a pressure leak detection device

A technology of cooling water pipes and repair methods, applied in cooling devices, inspection devices, etc., can solve the problems of unbalanced local cooling effect and surrounding cooling effect, affecting the service life of blast furnace staves, and high repair costs, so as to save spare parts and maintenance Effects of reducing costs, improving indicators and operating rates, and saving maintenance time

Active Publication Date: 2018-11-23
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the problems in the prior art that the repair of blast furnace stave water leakage causes the imbalance of the local cooling effect and the surrounding cooling effect, which affects the service life of the blast furnace stave and high repair costs, the present invention provides a cooling water pipe for the blast furnace stave Restoration method and its structure and pressure leak detection device

Method used

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  • A method for repairing the cooling water pipe of the stave of a blast furnace, its structure, and a pressure leak detection device
  • A method for repairing the cooling water pipe of the stave of a blast furnace, its structure, and a pressure leak detection device
  • A method for repairing the cooling water pipe of the stave of a blast furnace, its structure, and a pressure leak detection device

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Embodiment 1

[0060] A steel plant with a 4000m 3 Since the blast furnace was ignited and put into operation in February and May of 2005, the production has been running stably and efficiently. However, since this year, it has been found that the stave has been damaged to varying degrees. Through investigation, there are currently three through cooling in the middle of the A blast furnace shaft 8B, 20D, and 57A. The water pipe leaks, that is, there is water leakage in at least three staves. The stave water pipe structure above the 12th floor of A blast furnace is as follows: figure 1 As shown, each stave has 4 water pipes, which are marked as A, B, C, and D respectively. 8B represents No. B pipe of the eighth stave, and the rest are analogized.

[0061] In view of past experience, once the blast furnace body cooling equipment is damaged, the damage speed of the blast furnace body cooling equipment will become faster and faster; the blast furnace has entered the stage of furnace protection...

Embodiment 2

[0081] A method for repairing cooling water pipes of blast furnace staves in this embodiment, the specific steps are basically the same as in Embodiment 1, the improvement is that it also includes step 7, grouting: through the beating port opened at the extended end 31 of the damaged cooling water pipe 3 312 Fill the gap between the metal hose 4 and the damaged cooling water pipe 3 with high thermal conductivity grouting material, which has the dual functions of fixing the metal hose and conducting heat, and avoiding the frictional displacement of the metal hose due to the action of water flow. And reduce the service life of the metal hose, and open the air hole 311 at the protruding end 31 of the other end, and seal the annular ports at both ends, so that the beating work is smoother and more uniform, and avoid unnecessary air bubbles inside the slurry during beating Uniform distribution of slurry.

Embodiment 3

[0083] The method for repairing the cooling water pipe of a blast furnace stave in this embodiment, the specific steps are basically the same as in the embodiment 2, and the improvement is that in step 6, the two ends of the metal hose 4 are connected to the external cooling pipe 6 through the seamless connection pipe 7 The water inlet pipe and the water outlet pipe are formed to make the cooling water flow synchronously and improve the synchronization of the cooling effect. A water valve 61 can also be set on the external cooling pipe 6 between the water inlet pipe and the water outlet pipe. When synchronization is required, the water valve is closed, and when synchronization is not required, the water valve is opened. The operation is simple and the flexibility is strong.

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Abstract

The invention discloses a blast furnace cooling-wall cooling water pipe repairing method and a structure thereof and a pressure leakage detection device, belonging to the technical field of iron making blast furnace production. The repairing method disclosed by the invention comprises the steps of pressure leakage detection, disconnection of a damaged cooling water pipe, leakage point bypass, threading of the damaged cooling water pipe, silk threading of the damaged cooling water pipe, pipe threading of the damaged cooling water pipe, external connection of a water source, grouting and the like. The repairing structure of the blast furnace cooling-wall cooling water pipe disclosed by the invention comprises the damaged cooling water pipe, a cooling water-in end at the upper part of the damaged cooling water pipe and a cooling water-out end at the lower part, wherein the cooling water-in end and the cooling water-out end are folded outward and communicated through an external cooling pipe, and a metal hose penetrates inside; a gap formed between the metal hose and the damaged cooling water pipe is filled with a high-heat conduction grouting layer; and a bypass pipe is arranged at the upper part of the external cooling pipe. In the invention, the problems that the service life of the blast furnace cooling wall is influenced and the repairing cost is high due to the imbalance between the local cooling effect and peripheral cooling effect in water leakage repairing of the blast furnace cooling wall are effectively solved.

Description

technical field [0001] The invention relates to the technical field of iron-making blast furnace production, in particular to a method for repairing a cooling water pipe of a cooling wall of a blast furnace cooling wall, its structure, and a pressure leak detection device. Background technique [0002] The problem of water leakage in staves has been plaguing domestic blast furnaces of all sizes. Once the water leakage directly affects the stability of the blast furnace. And there is no good way to solve the water leakage problem, if it is not handled properly, it will cause damage to the copper stave. Force the blast furnace to be repaired in advance, or even overhauled. Therefore, solving the water leakage problem has become the key to further optimize the production index of the blast furnace. [0003] Most of the domestic cooling wall leakage treatment methods are divided into two types: [0004] One is to switch soft water to industrial water and control the inflow o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/10C21B7/24
CPCC21B7/10C21B7/103
Inventor 廖海欧苏文
Owner MAANSHAN IRON & STEEL CO LTD
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