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Refractory Castables

We provide optimum Refractory Castables that are commonly used for hot face and back up linings. Our High Alumina Refractory Castables are highly appreciated for low thermal conductivity and low density that assists in conserving heat energy. Low concentration of iron in our Insulating Refractory Castables makes them perfect for various industries. WE offer Insulating Refractory Castables at very affordable prices within the specified time frame. We have carved a niche as one of the moving ahead Insulating Refractory Castables manufacturers and Suppliers based in India.

J R Crete Super
Product J R CRETE (SUPER)*
Type 70% Alumina Castable
Nature of Bond Hydraulic
Installation Vibration casting
General Properties
Raw Material Base Calcined Bauxite
Max. Service Temperature 14500C
Max. Grain Size 1.5 mm
Water required for casting 10 ~ 11 %
Reversible Thermal Expansion 0.65% at 10000C
Chemical Analysis Typical Value Specified
Al2O3 % 70.50 70.00 min.
SiO2 % 11.50
Fe2O3 % 4.20 5.0 max.
TiO2 % 7.20
CaO 6.10
LOI % 0.30
Physical Properties Typical Value Specification
Water for trowel ling consistency % 24 ~ 28
Water required for ramming consistency % 10 ~ 20
Transverse strength after drying at 110 ºC for 24 hours (kg/cm2) 17.0
Retained above maximum size 2 5.0 max.
Thermal Properties Typical Value Specification
Pyrometric cone equivalent (Orton/ºC) 32/1717 31.5/1699
Other Details
Packaging 50 Kg. Bags
Storage life 12 months
Delivery state Dry

J R Heat Castable are produced in three grades, designated as J R Heat-A, J R Heat-K and J R Heat-C. All contain the special high purity, high alumina refractory binder. Typical properties of these castable, including data on strength, conductivity and chemical composition are provided in the table at the bottom of this page. Each grade of J R Heat castable is used for a specific service temperature and environment.

J R Heat-A is a high purity, high alumina castable of exceptional quality with an alumina content of over 90% and with very low silica and iron contents. Hence, it is used for service temperatures up to 1750ºC and can resist attack from process gas atmospheres containing carbon monoxide and hydrogen.

J R Heat-A is particularly suitable for use in coke ovens gas production plants as well as gasification plants and is also used:

  • In the iron and steel industry for lining blast furnaces and for skew backs, ports and roof lining of arc-melting furnaces.
  • In the non-ferrous metal industry to line reverberatory furnaces where high purity aluminum is produced.
  • In reactors of refineries as well as in fertilizer plants where castable with a high degree of resistance to carbon monoxide, hydrogen and ammonia are desired.
  • For lining of preheaters/converters and on all transfer lines.

J R Heat-K, which has an alumina content of 60%, can be used for service temperatures up to 1600ºC. This castable also has a low iron content and can resist carbon monoxide attack. J R Heat-K can be used in:

  • Blast furnaces
  • Foundries
  • Boiler industry stoker arches
  • Locations where reducing atmospheres are encountered.
  • Construction of soak pit covers, forge furnaces, tunnel kilns, heat treatment furnace car tops as well as electro-phosphorus furnaces.

J R Heat-C is a castable with about 50% alumina and serves as a general purpose high temperature castable required for service temperatures up to 1500ºC. J R Heat-C is suitable for use in:

  • Iron and steel industry
  • Semi-permanent foundries
  • Annealing furnaces
  • Stress relieving furnaces
  • Construction of special refractory shapes, monolithic convection sections in water tube boilers, ash-hopper linings and incinerator arches

Packaging and Storage : J R Heat castable is available in HDPE packages of 50kg. The shelf life of J R Heat castable is six to nine months under ideal storage conditions.

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