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What are the advantages of intermediate frequency furnace ramming material and casting material?

What are the advantages of intermediate frequency furnace ramming material and casting material?

Ramming material refers to the unshaped refractory material that is constructed by ramming (manually or mechanically) and hardened under heating above normal temperature. It is made by mixing refractory aggregates, powders, binders, admixtures, water or other liquids with a certain gradation. According to the classification of raw materials, there are high alumina, clay, magnesia, dolomite, zirconium and silicon carbide-carbon refractory ramming materials.

Fire-resistant ramming materials are compared with other amorphous materials. The ramming materials are dry or semi-dry and loose. Most of them have no adhesion before forming. Therefore, only strong ramming can obtain a dense structure. Compared with castables and plastics, ramming materials have higher stability and corrosion resistance at high temperatures. However, it also depends on the selection of high-quality materials, and the reasonable ratio of pellets and powders is also very related.

Ramming material and castable are both refractory materials, but there are also differences between the two:

1. The difference of the raw material composition: The ramming material is mainly an unshaped refractory material made of a certain particle gradation aggregate and powder plus a binder and additives, which is mainly constructed by manual or mechanical ramming.

2. Ramming materials include corundum ramming materials, high-alumina ramming materials, silicon carbide ramming materials, carbon ramming materials, silicon ramming materials, magnesium ramming materials, etc. Like the electric furnace bottom ramming material, silicon carbide, graphite, electric calcined anthracite as raw materials, mixed with a variety of ultra-fine powder additives, fused cement or composite resin as a binder made of bulk materials. It is used to fill the gap between the furnace cooling equipment and the masonry or the filler for the masonry leveling layer.

  1. The castable is a kind of granular and powdery material made of refractory materials and a certain amount of binder. With high fluidity, it is suitable for unshaped refractory materials formed by casting method. The three major components of the castable are the main component, the additional component and the impurity, which are divided into: aggregate, powder and binder. Aggregate raw materials include silica, diabase, andesite and waxstone.