What are the requirements for bonding agents in the production of magnesium-carbon bricks?

General production of magnesium-carbon brick selection of bonding agents are coal asphalt, coal tar, special carbon resin, polyol, asphalt modified phenolic resin, synthetic phenolic resin and so on.

1. It has a certain viscosity and fluidity at room temperature, and has good wettability for magnesia and graphite

2. In the heat treatment process, the binder can be further condensed to make the product have higher strength

3. During heat treatment, the binder does not cause excessive expansion and contraction of the product to avoid cracking of the product

4. The C content should be high, and the carbon polymer after coking has good high temperature strength