Characteristics and functions of refractory ramming materials

The refractory ramming material is an amorphous refractory material constructed in the form of ramming. The raw materials used in the ramming material and refractory castable are partly the same, but the density is relatively lower than that of castable, and the water added during construction is less than that of castable.

The process of refractory ramming material is composed of granular material and binder and other groups, mainly by the way of strong ramming construction. Ramming material can also be made of composite, with silicon carbide, graphite, electric calcined anthracite as raw materials, and castable to use the same micro-powder technology, adding fused cement or composite resin as the binder mixing composed of loose materials. Under normal circumstances, its role is to fill the gap between the furnace cooling equipment and the masonry or the masonry screed layer is used as a filling material.

The ramming material has good chemical stability, corrosion resistance, wear resistance, spalling resistance, heat shock resistance. Refractory ramming material ramming lining, low moisture content, knot dense, better performance than the same material refractory castable. If it is acidic ramming material with sodium silicate, ethyl silicate, silica gel and other bonding agents, dry ramming material with borate, alkaline ramming material commonly used magnesium chloride salt and sulfate;

After the refractory ramming material is rammed and formed, it can be disassembled and baked after self-hardening to a considerable strength; Containing thermoplastic carbon binder, after cooling after considerable strength and then demoulding, can also be cooled with a die for sintering.

The advantage of refractory ramming material is that it can be pounded on the spot in the form of ramming, the equipment uses air pick or mechanical ramming, the amount of material is less or the use of unimportant parts, and it can also be tied by hand. However, the disadvantage of refractory ramming material is that the construction speed is faster than that of refractory castable, and the labor intensity is greater than that of castable.