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Refractory castables are a large group of different materials

发布日期:2020-03-02 16:17:25 访问量:196

The traditional dense castable is made of high alumina cement, which can bear the temperature of 1300-1800 ℃. These castables are very suitable for ordinary furnace applications, burner blocks, special muffle furnaces and boiler work. Resistance is the key quality, which changes with the selection of materials, leading to wear, thermal shock and slag erosion. Casting and jetting are methods of mounting materials. In order to facilitate pouring and placement, the spray gun material and water are combined at the nozzle of the spray gun equipment. For bulk materials, this is a good placement method, in this case, when the situation makes the template too time-consuming or impractical at all. Generally, the installation method depends on the cost.


As refractory castables are a large group of different materials, their physical properties and characteristics are different between the type of castables and the purpose of application, i.e. insulation, conventional densification, low cement, etc., and a group of differences in mineralogy and formula between castables. Differences in formulation and composition (source of raw materials) can produce significant physical differences in seemingly identical materials (similar density and reported chemical properties).


Refractory castables can be used to form an integral lining in all types of furnaces and kilns. Refractory castables are derived from a variety of raw materials, including clinker, andalusite, bauxite, mullite, corundum, flake alumina, silicon carbide, and perlite and vermiculite can be used for insulation purposes.


The main purpose of insulating refractory castables is to provide insulation linings or insulation materials as main linings in non severe applications. Therefore, insulating castables are formulated for low relative thermal conductivity rather than strength or wear resistance. The vast majority of insulating castables are aluminosilicate based, although high alumina, high purity insulating castables can be used in very high temperature environments (up to 1800 degrees Celsius) or combustion atmospheres containing high concentrations of hydrogen.

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