Manufacturing method of oriented silicon steel and spraying method of magnesium oxide coating layer of oriented silicon steel

Abstract

The invention discloses a manufacturing method of oriented silicon steel and a spraying method of a magnesium oxide coating layer of the oriented silicon steel, and belongs to the technical field of metallurgical technologies. The manufacturing method of the oriented silicon steel comprises the following steps: before a silicon steel sheet enters a drying furnace, carrying out the spraying process of the magnesium oxide coating layer of the oriented silicon steel; during spraying of the magnesium oxide coating layer of the oriented silicon steel, placing the silicon steel sheet in a spraying chamber which is equipped with an operating constant temperature and constant humidity set, operating the constant temperature and constant humidity set to create a constant temperature and constant humidity environment in the spraying chamber, and then completing the spraying process of the magnesium oxide coating layer of the oriented silicon steel in the spraying chamber. Therefore, the temperature and the humidity of the magnesium oxide coating layer during spraying can be controlled, and the phenomenon of a relatively large change amplitude of the moisture content of the sprayed magnesium oxide coating layer is avoided; the silicon steel sheet treated by the spraying process of the magnesium oxide coating layer of the oriented silicon steel can enter the drying furnace for high temperature annealing process so as to guarantee the subsequent production quality of a bottom layer of the silicon steel sheet.

Description

technical field [0001] The invention relates to the technical field of metallurgical technology, in particular to a method for manufacturing oriented silicon steel and a method for spraying a magnesium oxide coating on oriented silicon steel. Background technique [0002] Oriented silicon steel is an important ferrosilicon alloy used in the transformer (iron core) manufacturing industry, and is the main raw material for making transformers and other power equipment. [0003] In order to meet the requirements of physical properties of power equipment, silicon steel sheets are subjected to a high-temperature annealing process in a drying furnace during the manufacturing process of grain-oriented silicon steel. In the process of high-temperature annealing, in order to prevent sintering of silicon steel sheets, magnesium oxide (MgO) is usually sprayed on the surface of silicon steel sheets before high-temperature annealing. The sprayed magnesium oxide coating can form an excelle...

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Problems solved by technology

[0006] In order to solve the problem in the prior art that the spraying process of the magnesium oxide coating on silicon steel sheets is carried out in an uncertain environment, which affects the production quality of the subsequent silicon steel sheet bottom layer, the embodiment of the present invention provides a method for manufacturing oriented silicon steel and Spraying method of magnesia coating on oriented silicon steel

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