The proportion of ingredients for shaped refractory magnesia carbon bricks

1. Introduction to Magnesia Carbon Brick

Magnesia Carbon Brick is a refractory material made of magnesia sand and artificial graphite as the main raw materials, with a certain amount of auxiliary materials such as antioxidants and binders added and sintered at high temperature. It has the characteristics of high strength, strong impact resistance, high temperature resistance, good thermal shock resistance, etc., and is widely used in high-temperature fields such as steel smelting and non-ferrous metal smelting.

2. Magnesia Carbon Brick Ingredient Ratio

1. Magnesia Sand

Magnesia sand is one of the main raw materials of magnesia carbon brick, accounting for about 50-80% of the total ingredient ratio. When selecting magnesia sand, factors such as its purity, particle size, classification, particle shape and impurity content need to be considered.

2. Artificial Graphite

Artificial graphite is another main raw material, accounting for about 15-35% of the total ingredient ratio. Its function is to improve the electrical conductivity and thermal conductivity of magnesia carbon bricks, enhance antioxidant capacity, and improve corrosion resistance.

3. Antioxidant

Magnesium carbon bricks are susceptible to oxidation in high temperature environments, so a certain proportion of antioxidants needs to be added. Commonly used antioxidants include aluminum powder, graphite, ammonia water, etc., accounting for about 1-5% of the total ingredients.

4. Binder

Binder is an important component that bonds raw materials together through sintering reaction. Commonly used binders include phenolic resin, graphene, lithium carbonate, etc., accounting for about 1-5% of the total ingredients.

5. Other auxiliary materials

According to specific needs, magnesium carbon bricks can also add some auxiliary materials, such as anti-corrosion agents, reinforcing agents, alkali metal compounds, etc., to improve their specific performance characteristics.

3. Summary

The proportion of ingredients in refractory magnesia carbon bricks has an important influence on their quality and performance. The proportion of each raw material needs to be strictly controlled to meet different usage requirements. In the process of using magnesia carbon bricks, it is also necessary to pay attention to the correct use method to extend its service life and make it play the best refractory performance.

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