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Blast furnace cooling wall water pipe repairing method

A repair method and stave technology, applied in the direction of cooling devices, etc., can solve the problems of reduced cooling water volume of cooling equipment, affecting the cooling strength of staves, and H1 inflow water flow reduction, so as to ensure water flow, shorten wind break time, and reduce The effect of small resistance loss

Active Publication Date: 2020-04-21
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

This will result in a decrease in the water flow rate of H1 and affect the cooling strength of the cooling wall
When a large number of cooling water pipes are damaged, the cooling water volume of the upper cooling equipment will be greatly reduced

Method used

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  • Blast furnace cooling wall water pipe repairing method

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Effect test

Embodiment

[0024] Such as figure 1 Shown, a kind of repair method of blast furnace stave water pipe, comprises the following steps:

[0025] Step 1. Add pipe-through return water bag 6: Before the wind breaks, the maintenance personnel will place 315°-360°, 0°-45°, 45°-90°, 90°-135°, 135° on the 19m platform at an elevation of 22m Five directions of °-180 ° have added five pipe-through return water bags 6. Each backwater bag is 3 meters long, welded with Φ114×7 seamless steel pipe, and effectively fixed with brackets. On the return water ring pipe of the copper cooling plate, press the water belt to open 5 holes with an inner diameter of Φ100, connect the pipe return water bag 6 with the copper cooling plate drainage ring pipe, and install a DN100 gate valve in the middle. There are 7 holes spaced apart on the return water bag, the hole spacing is 300-450mm, the inner diameter of the hole is Φ32mm, the hole position is directly below the pipe, and the distance between the inner diamete...

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Abstract

The invention relates to a blast furnace cooling wall water pipe repairing method, and belongs to the technical field of cooling wall repairing. The method comprises the following steps that a, pipe penetrating water returning bags are additionally arranged; b, a damaged water pipe is confirmed; c, a hard pipe is arranged; d, the damaged water pipe is subjected to pipe penetrating; e, a miniaturecooler is arranged; f, a softened water pump is arranged; and g, step-by-step water transferring is carried out. According to the method, the resistance loss of softened water flowing in the water pipe is reduced, the necessary water flow is ensured, and the cooling strength of pipe penetrating is improved; the blast furnace blowing-down time is shortened; the damaged cooling water pipe can be quickly confirmed, and the accuracy is 100%; the resistance loss of a hose is favorably reduced, and the subsequent trepanning operation of the hard pipe is facilitated; by arranging the miniature cooler, the cooling function of the damaged water pipe which cannot be subjected to pipe penetrating is repaired; and after blast furnace reblowing, the softened water pump is additionally started, and a step-by-step water quantity adjusting scheme is adopted, so that the cooling strength of the cooling water pipe is ensured.

Description

technical field [0001] The invention relates to a method for repairing a cooling wall water pipe of a blast furnace, and belongs to the technical field of cooling wall repairing. Background technique [0002] After the cooling water pipe of domestic blast furnace stave is damaged, the damaged cooling water pipe is generally repaired by piercing the pipe, or a micro-cooler is implanted in the damaged cooling water pipe or an intermediate repair is performed to replace the whole stave. The patent document of Chinese patent application publication number CN105969924 A discloses a method for repairing cooling water pipes of blast furnace staves. First find the leak by pressing and confirm the damaged cooling water pipe. Put the metal hose inside the damaged cooling water pipe, and fill the gap formed by the metal hose and the damaged cooling water pipe with a high thermal conductivity grouting layer; The water flow of the metal hose compensates for the unbalanced cooling effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/10
CPCC21B7/10
Inventor 袁孝法王书龙蔡刚李志辉
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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