Method for relieving nodulation of furnace roller of continuous annealing furnace

A continuous annealing furnace and furnace roll technology, which is applied in the direction of furnaces, furnace types, heat treatment furnaces, etc., can solve the problems of continuous annealing furnace rolls that are easy to nodulate, so as to ensure the cleanliness and stability of furnace rolls and relieve furnace roll nodulation , Reduce the effect of high foreign matter concentration

Active Publication Date: 2019-09-17
马钢(合肥)钢铁有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the existing continuous annealing furnace rolls are prone to nodulation, the present invention provides a method for alleviating the continuous annealing furnace ro

Method used

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  • Method for relieving nodulation of furnace roller of continuous annealing furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A method for alleviating nodulation of rollers in continuous annealing furnaces, the steel type is M250P1, and the layout plan is 180 tons.

[0056] The relationship between the nominal roll diameter b of the furnace roll set in the PLC program and the actual roll diameter a of the furnace roll is: b=a+5mm.

[0057] The inner wall of the furnace roll is coated with LC056, the thickness of the coating is 0.05mm, and the hardness of the coating is HV=900. The manufacturer is Shanghai Junshan Surface Technology Co., Ltd.

[0058] During the strip steel production process, it is processed as follows:

[0059] (1) the emulsion concentration of acid rolling group control S2 is 2.0%, and the emulsion concentration of S3 is 0.7%; The iron powder content of the emulsion of F1-F4 is 300ppm, and the iron powder content of the emulsion of F5 stand rolling mill is 100ppm; the flow rate of the emulsion in the F1-F5 stand rolling mill is 5000L / min; the temperature control of the emul...

Embodiment 2

[0068] A method for alleviating nodulation of rollers in continuous annealing furnaces, the steel type is M210P1, and the layout plan is 200 tons.

[0069] The relationship between the nominal roll diameter b of the furnace roll set in the PLC program and the actual roll diameter a of the furnace roll is: b=a-5mm.

[0070] The inner wall of the furnace roll is coated with LC056, the thickness of the coating is 0.07mm, and the hardness of the coating is HV=1000. The manufacturer is Shanghai Junshan Surface Technology Co., Ltd.

[0071] During the strip steel production process, it is processed as follows:

[0072] (1) the emulsion concentration of acid rolling group control S2 is 3.0%, and the emulsion concentration of S3 is 0.6%; The iron powder content of the emulsion of F1-F4 is 250ppm, and the iron powder content of the emulsion of F5 stand rolling mill is 80ppm; the flow rate of the emulsion in the F1-F5 stand rolling mill is 6000L / min; the temperature control of the emul...

Embodiment 3

[0080] A method for alleviating nodulation of furnace rolls in continuous annealing furnaces. The steel type is DC04, and the layout plan is 210 tons.

[0081] The relationship between the nominal roll diameter b of the furnace roll set in the PLC program and the actual roll diameter a of the furnace roll is b=a+3mm.

[0082] The inner wall of the furnace roll is coated with LC056, the thickness of the coating is 0.06mm, and the hardness of the coating is HV=950. The manufacturer is Shanghai Junshan Surface Technology Co., Ltd.

[0083] During the strip steel production process, it is processed as follows:

[0084] (1) the emulsion concentration of acid rolling group control S2 is 2.5%, and the emulsion concentration of S3 is 0.5%; The iron powder content of the emulsion of F1-F4 is 270ppm, and the iron powder content of the emulsion of F5 stand rolling mill is 90ppm; the flow rate of the emulsion in the F1-F5 stand rolling mill is 5500L / min; the temperature control of the em...

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Abstract

The invention discloses a method for relieving nodulation of a furnace roller of a continuous annealing furnace and belongs to the field of cold rolling continuous annealing. The method is characterized in that after alkali washing, scrubbing, electrolytic cleaning, water washing and rinsing are carried out on a cleaning section, the reflectivity of the strip steel surface is larger than or equal to 92%. According to the method for relieving the nodulation of the furnace roller of the continuous annealing furnace, the reflectivity of the cleaned strip steel is accurately controlled, so that the nodulation of the furnace roller of the continuous annealing furnace can be effectively relieved, the furnace roller of the continuous annealing furnace can be achieved to not be replaced by more than 150 days, and the number of less replacement furnace roller is accumulated to more than 10; and the method can effectively and continuously organize production, the yield can be improved, the capacity can be released, and the production and processing cost can be reduced.

Description

technical field [0001] The invention belongs to the field of continuous annealing of cold rolling, and more specifically relates to a method for alleviating nodulation of furnace rolls of a continuous annealing furnace. Background technique [0002] In the continuous annealing furnace, due to the continuous updating and adjustment of the product structure during the continuous annealing process, nodules will inevitably occur on the furnace rolls. If the furnace rolls are nodulated, dense "pimples" will be formed on the surface of the furnace rolls. These "Small bumps" will grow bigger and bigger with the continuation of production, and will eventually lead to the formation of dense small pits on the surface of cold-rolled strip steel, which will affect the grade of the strip steel surface of cold-rolled products. Once the nodules are serious After that, the production must be stopped for maintenance, the furnace should be shut down, the continuous annealing furnace should be...

Claims

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Application Information

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IPC IPC(8): B21B45/02B21B15/00C21D9/52
CPCB21B15/00B21B45/02B21B2015/0057B21B2015/0064C21D9/52
Inventor 江欢郑旺胡笛
Owner 马钢(合肥)钢铁有限责任公司
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