Refractory Castable

Description : Refractory Castable

Dry materials that can be combined with water to form a homogenous mass which can be cast in formwork similar to concrete.Castable refractories can be classified into four major groups - dense castables, lightweight or insulative castables, gunning castables, and special purpose castables - sometimes these classifications can be combined, such as lighhtweight gunning castables, or dense gunning castables.

Application

Dense castables are designed for strength, abrasion and corrosion resistance and are primarily used as the working hot face.

Lightweight insulating castables provide low thermal conductivity values behind dense castables, or in certain conditions as working hot face linings.

Gunning castables are modified versions of the above castables that allow them to be effectively placed using pneumatic guns. Some grades are dual purpose, allowing both casting and gunning without change.

Special duty castables feature specifically enhanced properties over conventional castables, such as the modern range of low cement castables and castables with less conventional binders.

Features and Benefits

Castable refractories offer these advantages:

- High strength at low temperatures.

- Air and gas-tight joints result in fuel savings.

REFRACTORY CASTABLES

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 gunning or manually. 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.

CONVENTIONAL DENSE CASTABLES

Conventional dense castables are created with high alumina cement, and can withstand temperatures from 1300^oC to 1800^oC. These refractory castables are great for common furnace applications, burner blocks, speciality muffle furnaces and oiler 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.

INSULATING CASTABLES

Another product that we supply is the castable refractories that are low density. These insulating castables pose very low thermal conductivity and are utilized for either high temperature face work or when used for a backup lining, which is found behind dense castables or brick work. Here, the insulating castables are able to decrease the lining’s overall density or the cold face temperature. Their strength, which ranges from low to medium, is based on the fact that their density is low and is the main reason that they are not resistant to abrasion. They are most suitable where they do not have to stand up to much wear and tear.

LOW CEMENT CASTABLES

This type of refractory castable is prepared with a lower amount of cement than the standard dense castable is normally created with. Low cement castable refractories fluctuate in alumina content, which provides exceptional physical properties, including low porosity, great abrasion properties and high vigour. These products will commonly necessitate installation that is controlled, however, the big advantage of low cement castables is that they are easily pumped into position, and some may not require vibration, because they are free flowing.

Refractory Castable

Description : Refractory Castable

Dry materials that can be combined with water to form a homogenous mass which can be cast in formwork similar to concrete.Castable refractories can be classified into four major groups - dense castables, lightweight or insulative castables, gunning castables, and special purpose castables - sometimes these classifications can be combined, such as lighhtweight gunning castables, or dense gunning castables.

Application

Dense castables are designed for strength, abrasion and corrosion resistance and are primarily used as the working hot face.

Lightweight insulating castables provide low thermal conductivity values behind dense castables, or in certain conditions as working hot face linings.

Gunning castables are modified versions of the above castables that allow them to be effectively placed using pneumatic guns. Some grades are dual purpose, allowing both casting and gunning without change.

Special duty castables feature specifically enhanced properties over conventional castables, such as the modern range of low cement castables and castables with less conventional binders.

Features and Benefits

Castable refractories offer these advantages:

- High strength at low temperatures.

- Air and gas-tight joints result in fuel savings.