Construction method of refractory ramming material

Silicon carbide-corundum composite refractory ramming mass is primarily used in water-cooled wall areas. Its high thermal conductivity rapidly removes heat from the slag on its surface, thereby reducing the slag temperature and causing it to solidify. This gradually forms a stable solid slag layer, achieving a "slag-to-slag" effect and effectively protecting the refractory material from the erosion of high-temperature liquid slag.

Silicon carbide-corundum composite refractory ramming mass is a SiC-Al2O3 system. Its raw materials include silicon carbide, corundum, activated alumina powder, additives, and binders. The typical composition of silicon carbide-corundum composite ramming mass is 65%-75% silicon carbide and 20%-30% alumina. The binder is applied in liquid form and applied by ramming onto the surface of the water-cooled coil.

Dry wall ramming mass is primarily composed of aggregates of a specific particle size distribution, powders, binders, and additives. It is a monolithic refractory material applied manually or mechanically. It is primarily used as a filler.

Casting material is also a type of refractory castable material. It is primarily suitable for forming refractory castables.

Both are refractory castables, but one is primarily used for filling, while the other is primarily used for pouring. Ramming material is simpler to apply, while casting material is more complex. Generally speaking, the difference between the two is that refractory castables are primarily used for pouring key areas within the furnace, while ramming material is primarily used for filling corners.

Carbon ramming material is applied by either cold or hot ramming. Cold ramming is more convenient than hot ramming, and cold ramming is generally used directly. For hot ramming, the ramming material must be crushed first, and the heating temperature is determined by the final mix temperature. When heated until there are no lumps and the ramming hammer head is heated to 70°C and dark brown, ramming is carried out in layers, with each layer not exceeding 100mm thick. During ramming, use a hammer to press half the weight, repeating the ramming motion several times. Check for compaction or compression. The compression ratio is 40-45%. Before ramming the next layer of ramming material, the surface of the upper layer should be roughened to ensure a tight bond between the upper and lower layers.