What are the advantages of ramming material compared with castable material?

Ramming material refers to unshaped refractory materials that are constructed by ramming (manual or mechanical) and hardened under the action of heating higher than normal temperature. It is made by adding water or other liquids after mixing. According to the raw materials, there are high alumina, clay, magnesia, dolomite, zirconium and silicon carbide-carbon refractory ramming materials.

Compared with other amorphous materials, the refractory ramming material is dry or semi-dry and loose, and most of them have no cohesiveness before forming. Therefore, only strong ramming can obtain a dense structure. The ramming material is the same as the castable. Compared with plastics, it has higher stability and corrosion resistance at high temperature. However, it also depends on the selection of high-quality materials, and the reasonable ratio of granules and powders is also closely related.

Ramming materials and castables are both refractory materials, but there are differences between the two:

1. Differences in raw material composition: The ramming material is mainly composed of aggregate and powder with a certain particle gradation plus a binder, and the additive is mainly made of artificial or mechanical ramming construction of unshaped refractory materials.

2. The ramming materials include corundum ramming materials, high alumina ramming materials, silicon carbide ramming materials, carbon ramming materials, siliceous ramming materials, magnesium ramming materials, etc. Silicon carbide, graphite, electric calcined anthracite as raw materials, mixed with a variety of ultra-fine powder additives, fused cement or composite resin as binders. Filler for body leveling layer.

3. Castable is a granular and powdery material made of refractory material with a certain amount of binder. It has high fluidity and is suitable for unshaped refractories formed by casting method. The three main components of the castable are mainly The three kinds of ingredients, additional ingredients and impurities are divided into: aggregates, powders and binders. The raw materials of aggregates are silica, diabase, andesite and waxstone.