Magnesia-carbon Brick
Products Description
Magnesia-carbon brick is made of high melting point basic oxide magnesium oxide (melting point 2800℃) and high melting point carbon material which is difficult to be penetrated by slag as raw materials, and various non-oxide additives are added. Non-burning carbon composite refractory material combined with carbon binder. Magnesia carbon brick is mainly used in converter, AC electric arc furnace, DC electric arc furnace lining, ladle slag line and other parts.As a kind of composite refractory material, magnesia carbon brick effectively utilizes magnesia's strong slag erosion resistance and carbon's high thermal conductivity and low expansion, compensating for the biggest shortcomings of magnesia's poor spalling resistance.
intro
►Main feature
1 Good high temperature resistance,
2 strong slag resistance,
3 good thermal shock resistance,
4 low high temperature creep,
►Effect of raw materials on properties of magnesia-carbon brickThe main raw material of the production of magnesia carbon brick,
the quality of magnesia sand has a very important impact on the performance of magnesia carbon brick, howReasonable selection of magnesia is the key to the production of magnesia carbon brick. Magnesia has electric fused magnesia and sintered magnesia, which have different characteristics.Fused magnesia: large grain, less impurities, less silicate phase, high degree of direct grain combination, less grain boundaries.
►The requirements for the bond for the production of magnesia-carbon brick are,
1. It has certain viscosity and fluidity at room temperature, and has good wettability to magnesia and graphite
2 In the heat treatment process, the binder can be further condensed, so that the product has a higher strength
3. In the heat treatment process, the binder does not cause the product to expand and contract too much to avoid cracking of the product
4. The C content should be high, and the carbon polymer after coking treatment has good high temperature strengthThe general production of magnesium carbon brick selection of bonding agents are coal pitch, coal tar, special carbon resin, polyol, asphalt modified phenolic resin, synthetic phenolic resin and so on.
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