A method for removing nodules from furnace rolls in continuous annealing furnaces for cold-rolled sheets

Abstract

A method for removing nodules on furnace rolls of a continuous annealing furnace for cold-rolled sheets. The specific process steps are as follows: furnace roll cleaning─furnace roller surface descaling treatment─furnace roller nodulation type determination─furnace roller surface nodulation treatment─inspection and acceptance . The present invention scientifically classifies furnace roll nodules, and then completes the removal of furnace roll nodules in continuous annealing furnaces for cold-rolled sheets according to certain removal steps and using special cleaning tools, thereby solving the difficult problem of furnace roll nodulation removal and ensuring the removal of nodules. The roundness and roughness of the furnace roll will not be affected after the nodulation, thereby prolonging the service life of the furnace roll, reducing equipment costs and preventing product defects.

Description

technical field [0001] The invention relates to the technical field of removing nodules on furnace rolls used in a specialized continuous annealing furnace for cold-rolled plates, and belongs to the field of metallurgical industry. Background technique [0002] The continuous annealing and hot-dip galvanizing unit is a long-term continuous production unit. During the long-term continuous production of the continuous annealing furnace, the unclean strip surface will bring iron powder, dust and grease into the furnace. Under high-temperature operation, metal oxides, metal reductions, carbides, etc. are formed and remain on the surface of the furnace rollers in the furnace; under normal circumstances, the furnace rollers of the continuous annealing furnace need to be cleaned regularly, otherwise these pollutants will not only affect product quality and The equipment in the furnace will be affected and damaged, and it will also enter the zinc liquid and pollute the zinc liquid, ...

AI Technical Summary

Problems solved by technology

Under high-temperature operation, metal oxides, metal reductions, carbides, etc. are formed and remain on the surface of the furnace rollers in the furnace; under normal circumstances, the furnace rollers of the continuous annealing furnace need to be cleaned regularly, otherwise these pollutants will not only affect product quality and The equipment in the furnace will be affected and damaged, and it will also enter the zinc liquid and pollute the zinc liquid, which will greatly affect and threaten the production of high-quality products.

[0003] The traditional process of cleaning furnace roll nodules in our country is simply to clean up garbage and dust. When dealing with furnace roll nodules, the type of furnace roll nodules is not judged, but oil stones and other tools are used to remove furnace roll nodules. The process not only destroys the local roundness of the furnace roller, but also reduces the nodules and the roughness of the furnace roller surface in the surrounding area, which is harmful to the production of high-quality products; and the use of organic solvents that cannot be volatilized quickly, or there is residue after volatilization Cleaning furnace rollers and furnace equipment with special cleaning agent will greatly increase the probability of furnace roller nodules and shorten the service life of furnace rollers

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