What Is The Preparation Method Of Magnesia Alumina Refractory Bricks? How To Mix Magnesium Mud?

What is the preparation method of magnesia alumina refractory bricks? How to mix magnesium mud?

1. Preparation method of magnesia-alumina refractory bricks

Magnesia alumina refractory brick is a refractory material with magnesium oxide and alumina as its main components. It has excellent fire resistance and high temperature stability. Its preparation method mainly includes the following steps:
1. Ingredients: According to the performance requirements of the required magnesia alumina refractory bricks, select appropriate magnesium oxide and alumina raw materials, and make ingredients according to a certain proportion.
2. Mixing: Thoroughly mix the magnesium oxide and aluminum oxide in the ingredients to ensure even distribution of the raw materials.
3. Forming: Put the mixed raw materials into the mold and form refractory bricks in the desired shape by pressing or extrusion.
4. Drying: Dry the formed refractory bricks to remove moisture.
5. Firing: Put the dried refractory fire bricks into a high-temperature furnace for firing to promote chemical reactions and structural changes between raw materials.
6. Cooling: The fired refractory bricks are cooled naturally or forcedly to obtain the required performance.

2. The ratio of magnesia mud

Magnesia mud is one of the important raw materials in the preparation process of magnesia alumina refractory bricks, and its proportion has an important influence on the performance of refractory bricks. Generally speaking, the ratio of magnesia mud needs to consider the following factors:

1. The ratio of magnesium oxide and alumina: Select the appropriate ratio of magnesium oxide and alumina according to the performance requirements of the required refractory firebricks. Generally speaking, magnesia mud with higher magnesium oxide content has better fire resistance and high temperature stability.
2. The amount of clay or binder used: The amount of clay or binder has an important impact on the plasticity and sintering performance of magnesia mud. An appropriate amount of clay or binder can improve the plasticity and sintering performance of magnesia mud, but too much clay or binder will reduce the performance of refractory bricks.
3. Moisture content: The moisture content in magnesia mud has an important impact on the molding and firing process. An appropriate amount of moisture can improve the plasticity and fluidity of magnesia mud, but too much moisture will lead to difficulty in molding and a decrease in the performance of the refractory firebricks after firing.
4. The amount of other additives: As needed, appropriate amounts of other additives, such as iron oxide, chromium oxide, etc., can be added to the magnesia mud to improve the performance of the refractory bricks.
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