Refractory castables are a kind of granular and powdery materials made of refractory substances, and a certain amount of binder and water are added to form them. It has high fluidity, is suitable for construction by castable method, and is an amorphous refractory material that can be hardened without heating. It is composed of aggregate, powder, binder, admixture, water or other liquid materials. It is generally cast and formed by pouring, vibrating or tamping at the site of use, and can also be made into prefabricated parts for use.
Refractory castables are mainly classified by porosity, binder, and aggregate type:
- According to the porosity distribution, there are two types of dense refractory castables and thermal insulation refractory materials with a porosity of not less than 45%;
- According to the binder, there are hydraulic bonded, chemical bonded, and condensed bonded refractory castables: 1) Hydraulic bonded castables solidify and harden at room temperature and harden through hydration. The main varieties are silicate cement, ordinary calcium aluminate cement, pure calcium aluminate cement, and fused pure calcium aluminate cement castables; 2) Chemical bonded castables are generally hardened by adding a hardening accelerator to form a chemical reaction at room temperature. The main varieties are water glass, aluminum sulfate, phosphate castables, etc.; 3) Condensed bonded castables are hardened by sintering during the calcination process. The main varieties are clay castables, etc.
Refractory castables are a kind of unshaped refractory materials which are widely produced and used at present. Mainly used for building various heating furnace lining and other integral structures pressed in metallurgy, petroleum, chemical, building materials, electric power, machinery industry kilns and heating equipment heavy pipe rice use, high-quality products can also be used for smelting furnace, refractory castables generally have a high ambient strength, can be made into prefabricated parts in the kiln site installation.
Pounding material refers to the construction with pounding method, and hardened under the effect of heating higher than room temperature of the indefinite refractory material. As a result of a certain gradation of refractory aggregate, powder, binding agent, additives, water or other liquids after mixing and become. According to the material of the bandits by the high alumina, clay, magnesium, dolomite, zirconium and silicon carbide – carbon refractory pounding material.
Tamping material with silicon carbide, graphite, electrocalcined anthracite as raw materials, mixed with a variety of ultra-fine powder additives, electrofusion cement or composite resin as a binding agent made of bulk material body. It is used to fill the gap between furnace cooling equipment and masonry or masonry leveling layer with filler. With good chemical stability, resistance to scouring, abrasion, flaking and heat shock, it is widely used in metallurgy, building materials, non-ferrous metal smelting, chemical industry, machinery and other manufacturing industries!
Acid, neutral, alkaline batter is widely used in coreless medium frequency furnace, core induction furnace, as medium frequency furnace batter to melt gray cast iron, ductile cast iron, calcined cast iron, creep cast iron and cast iron alloys, melt carbon steel, alloy steel, high manganese steel, tool steel, heat-resistant steel, stainless steel, melt aluminum and its alloys, melt copper alloys such as bronze, brass, copper and bronze, and so on.
What is Refractory Castables?
Refractory Castables are composed of various refractory aggregate powders as the main raw material, refractory cement as a combination, and adding anti-shrinkage agent, explosion-proof fiber, coagulant and other admixture materials. It has high fluidity and is also used for pouring construction to become a castable. Suitable for unshaped refractory materials formed by casting.
What is Ramming material?
Ramming material is a ceramic material that is used as a liner to contain molten metal within a furnace of a smelting operation. There are several types that are engineered to work with different molten metals.
What materials are used in refractory castables?
There is a wide variety of raw materials that refractory castables are derived from, including chamotte, andalusite, bauxite, mullite, corundum, tabular alumina, silicon carbide, and both perlite and vermiculite can be used for insulation purposes.
