Replacement method for cooling water pipe of cooling wall of blast furnace

Abstract

The invention provides a replacement method for a cooling water pipe of a cooling wall of a blast furnace. A broken cooling water pipe is disconnected with a front cooling water pipe and a rear cooling water pipe; and the front cooling water pipe and the rear cooling water pipe are connected through an external water pipe, so that cooling water is directly circulated across the broken cooling water pipe. Meanwhile, a metal hose is penetrated in the broken cooling water pipe and is connected to a replaced cooling water pipe, which is communicated with an external water source, through seamless steel pipes at the two ends, so that cooling water in the metal hose independently forms a passage to continuously realize a cooling function. By using the method, quick replacement of the broken cooling water pipe is realized without affecting normal water supply cooling of other cooling water pipes, the water leakage phenomenon in the blast furnace is eliminated, the problem of increased coke ratio caused by reduced furnace temperature is prevented, the cooling function of the broken cooling water pipe is restored, the cooling effect of the cooling wall is guaranteed, and the service life of the cooling wall can be prolonged.

Description

technical field [0001] The invention belongs to the field of auxiliary equipment for ironmaking blast furnaces, and in particular relates to a method for repairing and replacing damaged cooling water pipes of ductile iron staves of blast furnaces. Background technique [0002] Blast furnace body stave is composed of copper stave and ductile iron stave. There are multiple cooling water pipes inside the nodular cast iron stave to ensure the cooling effect of the nodular cast iron stave. The water supply method of the cooling water pipe adopts a closed circuit circulation and cooling from bottom to top. During the normal production process of the blast furnace, due to the influence of many factors such as the corrosion and wear of the furnace charge, the change of the furnace temperature, and the thermal stress of the furnace skin and the stave, the stave and the cooling water pipe are prone to local damage. If the wall and cooling water pipe are damaged, water will leak into ...

AI Technical Summary

Problems solved by technology

This method reduces the amount of water and cannot change the situation of water leakage into the furnace, resulting in an increase in the coke ratio of the blast furnace

When the cooling wall is severely damaged, the two ends of the damaged cooling water pipe have to be blocked to prevent the cooling wall from passing through the water, so that the cooling wall loses its cooling function

In addition, reducing the amount of water will easily lead to a decrease in the water volume of other cooling water pipes connected in series with the damaged cooling water pipe, reducing cooling intensity and shortening the service life of other cooling water pipes

Since the cooling strength of the stuck cooling water pipe is reduced, the heat flow intensity of the surrounding cooling water pipe is increased, making it easy to be damaged, causing certain safety hazards to production

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