Hebei Messi Biology Co., Ltd. stated that magnesium oxide production has a history of several decades in my country, and the production process of the product has been basically mature. China has become the world’s largest magnesium oxide producer, with an annual production volume accounting for more than 75% of the world’s total production. However, most of the magnesium oxide produced is medium and low-end products, and there are fewer varieties of magnesium oxide production, which cannot meet the needs of domestic silicon steel companies. Therefore, Japanese companies’ active magnesium oxide, silicon steel magnesium oxide, etc. have a certain market share in China.
In order to improve the reactivity between magnesium oxide and silicon dioxide, magnesium oxide must be active, and nano magnesium oxide has the greatest reactivity. Therefore, nano magnesium oxide particles are introduced into silicon steel magnesium oxide using nanotechnology to improve the reactivity of silicon steel magnesium oxide. In order to increase the stacking density between magnesium oxide particles on the surface of silicon steel sheets, the material structure of silicon steel-grade magnesium oxide must tend to be approximately spherical, because spheres have the advantage of the most compact stacking, and magnesium oxide particles can be most densely stacked after being coated on the surface of silicon steel sheets.
After magnesium oxide acts on silicon steel sheets, it must be dried and rolled into a coil for secondary high-temperature annealing. Before entering the high-temperature annealing stage, the water molecules in the magnesium hydroxide generated by magnesium oxide during the pulping process must be gradually driven away during the annealing heating process. In this process, the coated magnesium oxide layer must have good air permeability, even if the water molecules in magnesium oxide can escape in the gap of the tightly rolled steel coil, so as to prevent water vapor from affecting the quality of the generated magnesium orthosilicate film.
Therefore, as magnesium oxide for high-temperature annealing, a single nano-magnesium oxide material cannot be used, but the magnesium oxide should be a collection of magnesium oxides with various particle sizes, that is, magnesium oxide materials with various particle sizes should each occupy a certain distribution ratio.