A method for quickly straightening the gun body of converter sub-lance

Abstract

The invention belongs to the technical field of converting furnace sublance maintaining methods, and relates to a method for quickly straightening a lance body of a sublance of a converting furnace. The method is used for quickly straightening the bent lance body of the sublance of the converting furnace. According to the technical scheme of the method, the sublance is rolled, so that the back portion of a bent pipe segment is arranged upwards; gas welding is used for heating and straightening heating points of the bent pipe segment of the lance body one by one, and heating areas of the heating points are located on the upper portion and the middle portion of the circumference of the lance body; after heating of the first heating point is completed, a person pours cooling water to the heating areas from top to bottom, and after it is visually inspected that steel pipe straightening is successful, water pouring should be stopped immediately; and the other heating points are sequentially heated and straightened. According to the method, operation is simple, only gas welding equipment can complete straightening of the bent pipe segment of the lance body of the sublance, maintenance equipment and manpower are saved, and the maintenance working efficiency of the sublance is greatly improved. According to the method, the service life of the sublance is greatly prolonged, the use rate of the sublance is increased, effective technical support is provided for cost decrease and benefit increase, the production cost of enterprises is reduced, and the enterprise benefits are improved.

Description

technical field [0001] The invention relates to a method for quickly straightening a curved converter sub-lance body, and belongs to the technical field of converter sub-lance maintenance methods. Background technique [0002] The sub-lance is an important equipment for converter production. The utilization rate of the sub-lance directly determines the smelting cycle, and the condition of the sub-lance body is related to the utilization rate of the sub-lance. During the production process, the sub-lance has to enter the converter to take samples and measure the temperature. After the sub-lance enters the converter, it will bend toward the tapping side of the converter. The bending part is about 2.5 meters to 3 meters from the gun head. The gun body of the sub-gun around 400 furnaces will be seriously bent, and the automatic connection with the probe cannot be realized, and the sub-gun must be replaced. After analysis, it is believed that the gun body structure of the sub-gu...

AI Technical Summary

Problems solved by technology

If the conventional mechanical straightening method is used for straightening, since the sub-gun has a three-layer sleeve structure, after the gun body of the sub-gun is bent and deformed, the mechanical straightening will change the interval between the three-layer sleeves of the gun body , resulting in affecting the use after straightening or not being able to use at all

There are also technicians who propose to rely on the rotary joint on the top of the gun body to rotate the sub-gun 180° and continue to use it so that the sub-gun can be automatically straightened. However, due to defects in the rotary joint and other reasons, the sub-gun cannot be used normally.

Therefore up to now, each iron and steel production enterprise does not have the method for effectively straightening the bent sub-lance, which becomes a difficult problem affecting the use of the sub-lance, and also increases the production cost of the enterprise, so it is very necessary to study a converter sub-lance body Fast straightening method to meet current production needs

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