Preparation process and application of magnesium oxide for low-temperature cold-rolled oriented silicon steel

Magnesium oxide for low-temperature cold-rolled grain-oriented silicon steel refers to magnesia prepared by chemical or physical methods under low temperature conditions (below 600°C) and used in the sintering process of grain-oriented silicon steel. Magnesium oxide used for low-temperature cold-rolled grain-oriented silicon steel has the following characteristics:

① The low sintering temperature can reduce the sintering temperature of grain-oriented silicon steel, improve production efficiency and save energy.

② The sintering shrinkage is small, which can improve the orientation rate and magnetic properties of oriented silicon steel.

③ High sintering strength can improve the strength and wear resistance of grain-oriented silicon steel.

The preparation processes of magnesium oxide for low-temperature cold-rolled grain-oriented silicon steel mainly include the following:

① Chemical method: react magnesium oxide raw materials (such as magnesium carbonate, magnesium hydroxide, etc.) with acid to generate magnesium oxide. Magnesium oxide prepared by chemical methods has a lower sintering temperature, but its sintering shrinkage is larger.

② Physical method: Calcining magnesium oxide raw materials (such as magnesium powder, magnesium slag, etc.) at high temperature to generate magnesium oxide. Magnesium oxide prepared by physical methods has a smaller sintering shrinkage, but the sintering temperature is higher.

The main applications of magnesium oxide for low-temperature cold-rolled grain-oriented silicon steel include the following aspects:

① Sintering of oriented silicon steel: Magnesium oxide for low-temperature cold-rolled oriented silicon steel is an essential material for sintering of oriented silicon steel, which can improve the performance of oriented silicon steel.

② Other uses: Magnesium oxide for low-temperature cold-rolled oriented silicon steel can also be used in other fields, such as magnetic materials, ceramic materials, refractory materials, etc.

③ In recent years, with the rapid development of low-temperature cold-rolled grain-oriented silicon steel technology, the application of magnesium oxide for low-temperature cold-rolled grain-oriented silicon steel has become more and more widespread.

Specifically, the application of magnesium oxide for low-temperature cold-rolled grain-oriented silicon steel in the sintering process of grain-oriented silicon steel has the following advantages:

① Lowering the sintering temperature of grain-oriented silicon steel can reduce production costs and save energy.

② Improving the orientation ratio and magnetic properties of oriented silicon steel can improve the performance and competitiveness of oriented silicon steel.

③ Improving the sintering process of oriented silicon steel can improve the production efficiency and quality stability of oriented silicon steel.

Therefore, magnesium oxide for low-temperature cold-rolled grain-oriented silicon steel has important application prospects in the field of grain-oriented silicon steel production.