REFRACTORY CASTABLE

A refractory material is a material that retains its strength at high temperatures. ASTM C71 defines refractories as “…non-metallic materials having those chemical and physical properties that make them applicable for structures, or as components of systems, that are exposed to environments above 538 °C

REFRACTORY CASTABLE

Refractory castables can be used to create the monolithic linings within all types of furnaces and kilns.

They can be further classified into the following sub categories:

conventional, low iron, low cement, and insulating for installation either by gun ning or manually.

• Conventional dense castables are created with high alumina cement and can withstand temperatures from

1300oC to 1800oC.

• These refractory castables are great for common furnace applications, burner blocks, speciality muffle furnaces and boiler work.

• Resistance is a key quality that varies with the choice of materials, resulting in abrasion, thermal shock and slag attack. Casting and gunning techniques are the method of installing the materials. For the ease of castable placement, gunning materials and water are combined together at the gunning equipment’s nozzle.

• This is a great method of placement for bulk materials, in cases when circumstances make formwork overly time consuming or simply impractical. In general, the method of installation will depend on cost and accessibility.