Medium Purity Dense Castables
Refracrete medium purity dense castables are suitable for use in applications. This group of castables contains medium purity high alumina cement as the refractory binder and castables are used for oxidising atmospheres.
These refractory castables are hydraulic setting and can be casted or moulded to any shape and can also be modified for gunning of furnace linings.
| BRANDS | Refracrete | Refracrete Super | Refracrete Spl. |
| Chemical Analysis | |||
| Al2O3% Min. | 45 | 70 | 45 |
| Fe2O3% Max. | 4 | 5 | 4 |
| Physical Properties | |||
| Service Temp. ˚C | 1400 | 1450 | 1350 |
| Bulk Density gms/cc | 2.10 | 2.55 | 2.20 |
| Water reqd. for casting% | 10.5 - 11.5 | 10 - 11 | 10.5 - 11.5 |
| Grain Size, mm | 5 | 5 | 5 |
| CCS Kgs/cm2 | |||
| At 110 ˚C/24 hrs. | 300 | 400 | 425 |
| At 800 ˚C/3 hrs. | 240 | 300 | 300 |
| At 1100 ˚C/3 hrs. | 180 | 250 | 225 |
| At 1350 ˚C/3 hrs. | 280 | 500 | 350 |
| Thermal Properties | |||
| PLC% @ 800˚C/ hrs. | - 0.06 | - 0.06 | - 0.12 |
| Heating at 1000˚C/3 hrs. | - 0.12 | - 0.18 | - 0.15 |
| Heating at 1350˚C/3 hrs. | - 0.50 | - 0.80 | - 0.50 |
| Thermal Conductivity | |||
| Kcal/m/hr/˚C at 400˚C HF | 0.74 | 0.93 | 0.75 |
| At 600 ˚C HF | 0.78 | 0.95 | 0.80 |
| At 800 ˚C HF | 0.84 | 0.98 | 0.86 |
