| MEDIUM PURITY DENSE CASTABLES | | | 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 Ã��Ã�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/Ã��Ã�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.
JRHeat-A
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.
JRHeat-K
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.
JRHeat-C
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.
|
