Method and device for magnesium coating of oriented silicon steel

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By forming arc-shaped grooves along the width direction on the grain-oriented silicon steel strip and combining them with dip coating and drying processes, the problem of difficult moisture removal in the production of grain-oriented silicon steel has been solved, achieving efficient moisture removal and quality improvement.

CN122377720APending Publication Date: 2026-07-14CIBAO NEW SHEET JIANGSU CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: CIBAO NEW SHEET JIANGSU CO LTD
Filing Date: 2026-06-11
Publication Date: 2026-07-14

AI Technical Summary

Technical Problem

During the production of grain-oriented silicon steel, it is difficult to effectively remove moisture from the bottom of the steel coil, leading to quality problems such as gold leakage, mottled spots, or water spots, which is especially noticeable in wide steel coils.

Method used

An arc-shaped groove extending along the width direction is formed on the oriented silicon steel strip to serve as a drainage channel in the magnesium oxide coating. The coating uniformity and curing are ensured through dip coating and drying processes. Finally, when the strip is rolled up, the channels formed by the indentation are used to drain the moisture.

Benefits of technology

It significantly improved the moisture removal rate, reduced the incidence of quality defects such as gold leakage, spots, and water spots, increased the product qualification rate, shortened the annealing time, and improved production efficiency and market competitiveness.

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Abstract

The application relates to a magnesium-coating method and device for oriented silicon steel, which comprises the following steps: S1, forming a pressure mark extending along the width direction on the oriented silicon steel strip; S2, uniformly coating magnesium oxide on the surface of the oriented silicon steel strip; S3, curing the magnesium oxide coating through drying; and S4, winding the oriented silicon steel strip into a roll, wherein the pressure mark forms a channel for discharging water in the magnesium oxide coating. The application forms a pressure mark extending along the width direction on the silicon steel strip, the pressure mark forms a water discharge channel in the oriented silicon steel strip roll, so that the water at the bottom of the cover furnace is more easily discharged, and quality problems such as magnesium leakage, mottling or water spot of the oriented silicon steel strip are avoided.

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