INTROUDUCTION

Refractory castable is premixed combinations of refractory aggregates, matrix components or modifiers, bonding agents, and admixtures. It is classified in several ways. It is based on chemistries which separates the refractory castable based on alumina and alumino-silicate aggregates such as magnesite and dolomite.

Refractory aggregates constitute the basic skeleton of castable materials , and it is accounted for the largest amount of the formulation. Aggregates size can range from 10 mm to 300 mm. Aggregates are sized and proportioned for getting desired packing and particle distribution. Varieties of refractory material aggregates is workable. Castable is formulated based on one or combined aggregates to realize the desired chemistry, mineralogy, and physical properties.

The bonding agents used for insulating castable refractory are varieties, including alumino-silicate castable. Calcium aluminium cement is still the main bonding agent for castable. Specialized castables have been developed for more than 20 years, by using non cement bonds such like hydratable alumina, clay, silica and alumina gels, and chemical bonds such like mono aluminum phosphate, phosphoric acid and alkali silicates. Basic castables rely on chemical or organic bonds, the most common types are alkali silicates, sodium phosphates, mineral or organic acids, and resins etc.

APPLICATIONS

Refractory castables can be utilized to make the solid linings inside a wide range of heaters and furnaces. They can be further arranged into the accompanying sub-classes: routine, low iron, low concrete, and protecting for establishment either by gunning or physically. There is a wide assortment of crude materials that refractory castables are gotten from, including chamotte, andalusite, bauxite, mullite, corundum, even alumina, silicon carbide, and both perlite and vermiculite can be utilized for protection purposes. Routine thick castables are made with high alumina concrete, and can withstand temperatures from 1300oC to 1800oC. These hard-headed castables are incredible for normal heater applications, burner pieces, claim to fame suppress heaters and evaporator work. Resistance is a key quality that shifts with the decision of materials, bringing about scraped spot, warm stun and slag assault. Throwing and gunning procedures are the technique for introducing the materials.

1. CONVENTIONAL CASTABLE
2. FIRECLAY
3. LOW CEMENT CASTABLE
4. UTRA LOW CEMENT CASTABLE
5. SELF FLOW CASTABLE
6. INSULATING CASTABLE
7. RAMMING MASS
8. BASIC RAMMING MASS
9. MORTAR
10. REFRACTORY BED MATERIAL

CONVENTIONAL CASTABLE

FIRE CLAY

LOW CEMENT CASTABLE

ULTRA LOW CEMENT CASTABLE

SELF FLOW CASTABLE

INSULATING CASTABLE

RAMMING MASS

BASIC RAMMIN MASS

MORTAR