Notes for using medium grade magnesia: 98 fused magnesia

Oxidation resistance: refractories have good thermal shock resistance and slag resistance because they contain carbon, but their disadvantage is easy oxidation. Once carbon is oxidized, its advantages disappear. To fully demonstrate the benefits of mid-range magnesia refractories, appropriate additives are often added to improve their oxidation resistance. Because of its good activity, easy to react with oxygen, cobalt, aluminum, silicon, magnesium and other elements, the metal is used as an antioxidant of refractory materials, and its alloy is commonly used as an antioxidant.

In situ reaction to produce non-oxide: the metal is introduced into the refractory, and the metal reacts with the material composition or the surrounding gas during the combustion process to form a non-metallic strengthening and toughening phase, which improves the matrix at room temperature, high temperature and thermal shock resistance. Now, this skill is widely emphasized.

Electric fused magnesia market

It can be seen that the addition of metal in the estimation of medium-grade magnesia refractories has a vivid effect on the mechanical properties and oxidation resistance of the refractories, indicating that the medium-grade magnesia has a broad application prospect in the estimation of refractories. Due to the continuous development of science and the continuous breakthrough of scientific scope, the function of refractory materials will be continuously optimized, and its application scale will be further expanded.

1. Molding: made of steel plate or hardwood, steel plate finishing agent (oil), waterproof paint on the board, should not leak pulp, and has good strength.

2. Stirring: Stir with professional equipment, first put the material into the equipment, take out the additives, dry mix for 2-3 minutes, and then add water to stir for 3-5 minutes, add appropriate water.

3. Vibration compaction: Pour the castable into the mold, immediately compaction, shall not leak to a certain direction, shall not be in the same direction of compaction, in order to prevent castable segregation and opening. The castable must be mixed out of the water within 20-30 minutes and the primary condensate must be discarded.

4. Protection: The appearance of castable is dull, the strength reaches 70%, and the mold can be removed for 24 hours and 48 hours.

5. Oven: According to the thickness of different trademarks and castables and their climatic conditions, users need to ensure 72 hours of baking time.