Cover the characteristics of the agent

1, insulation cover agent for low thermal conductivity material composition, such as: expansion perlite, expanded graphite, etc.

2, fever cover agent in addition to low thermal conductive materials, the join a percentage of fever materials, in the hot action of liquid metal, antioxidant that provide oxygen reductant oxidation fever, extend take the mouth of liquid metal coagulation time.

3, in different insulation cover agent, mouth contraction into "disc or a hemispherical bottom, already take mouth shrinkage shape is approximate mouth U shape.

4, was significantly longer mouth at the top crusting time, make take mouth for long at the molten steel atmospheric pressure under the role, which greatly increase the risk of mouth for shrink efficiency, be helpful for casting of air and inclusion floatation and up to the purification of the molten steel purpose, and get a sound steel parts, reduce defective index.