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Method for processing furnace roller nodules on line without opening furnace

A technology for treating furnace and nodules, which is applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve the problems of large safety hazards, high costs, and occupation of production time for nodules on the surface of furnace rolls, and achieve the elimination of pitting on the surface of strip steel, Effect of improving surface quality and reducing product degradation

Active Publication Date: 2016-03-09
MAANSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

When the surface of the roll surface is nodulated, it is easy to form quality defects such as pits and pits on the surface of the strip, which seriously affects the surface quality of the strip
[0004] The treatment of nodules on the surface of furnace rollers usually requires opening the furnace, manual dry ice cleaning or replacement of furnace rollers, which not only takes up a lot of production time, but also is expensive, and there is a great safety hazard in cleaning the nodules on the surface of furnace rollers

Method used

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Experimental program
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Effect test

Embodiment 1

[0023] A method for on-line treatment of furnace roll nodules without opening the furnace, specifically comprising the following steps:

[0024] On-line grinding of the furnace roll surface without turning on the furnace may cause the risk of strip deviation in the furnace, violent fluctuations in tension, and even strip breakage. Therefore, the implementation of the present invention requires the interaction between experienced operators and equipment maintenance personnel Cooperate and complete in the correct way. Taking a continuous annealing line as an example to treat nodules on the online grinding rollers, the thickness of the incoming strip steel of this production line is 0.4-2.5mm, and the width of the incoming material is 900-2000mm. The annealing furnace is divided into preheating, heating (I, II sections), Soaking, slow cooling, flash cooling, overaging, secondary cooling, and final cooling are nine sections in total, and the ones that are prone to nodules are the ...

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Abstract

The invention discloses a method for processing furnace roller nodules on line without opening a furnace. Due to the fact that the operating speed of band steel in the furnace is the same as the linear speed of furnace rollers, the diameter of the furnace rollers is corrected, and accordingly a new angular speed is produced by a furnace roller motor so as to be the same as the linear speed of other furnace rollers. According to the control scheme, the diameter of the furnace rollers to be repaired and ground is adjusted analogously by an operator so as to change the speed of the furnace rollers, and accordingly friction is generated between the furnace roller and the band steel, so that the nodules attached to the surfaces of the furnace rollers are eliminated or smoothed. Compared with the prior art, by means of the method for the furnace roller nodules in the initial stage, the quality deflects such as hard spots on the surfaces of the band steel are effectively relieved or eliminated, the surface quality of a finished roll is improved, the frequency of furnace opening to clean the furnace roller nodules annually is decreased, and the service life and the economic life of the furnace rollers are prolonged.

Description

technical field [0001] The invention belongs to the field of steel rolling process treatment, and in particular relates to a method for on-line treatment of furnace roll nodules without opening the furnace. Background technique [0002] In the continuous annealing furnace, the furnace roller plays the role of guiding the direction of the strip steel, so that the strip steel can be heated in the furnace while keeping the moving state. In the normal production process, due to the influence of factors such as poor surface cleanliness of the incoming strip steel, wear of the furnace roll coating, precipitation of certain elements in the incoming strip steel, and unstable furnace atmosphere, etc., the surface of the furnace roll will be formed. Tumor phenomenon. If the nodules are not dealt with in time, they will continue to gather and grow and firmly adhere to the surface of the furnace roll, resulting in "pitting" on the surface of the strip. [0003] Usually, we call the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/56
CPCC21D9/563
Inventor 李明丁钢高光泽黄冉
Owner MAANSHAN IRON & STEEL CO LTD
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