Low Cement Castables
Low Cement Castables
The product range includes low cement castable of different Alumina content (Al2O3 varying from 45% to 90%) with service range between 1,5000C to 1,8000C. These are characterized by
Al2O3 content and specific low Fe2O3 and low CaO content. Also water requirement for casting is less than 5%. These castables have very short curing time requirement. These are suitable for use in places where very quick setting is required thus reducing the downtime of Furnaces. These are being extensively used in furnaces like:
o Ladle and Tundish back-up lining
o Sintering Furnace roof
o Soaking pit covers
o Health of re-heating furnaces
Low Cement Castables
| TYPICAL FORMULATIONS OF CASTABLES & BASIC MASS | ||||||||||||||
| Chemical Analysis (%) | ||||||||||||||
| Product | Low Cement Castables | |||||||||||||
| Grades | LC 45 | LC 60 | LC 70 | LC 80 | LC 90 | |||||||||
| Al2 O3 (Min.) % | 45 | 60 | 70 | 80 | 90 | |||||||||
| MgO (Max.) % | ||||||||||||||
| Fe2 O3 (Max.) % | 1.5 | 1.5 | 1 | 1 | 1 | |||||||||
| SiO2 (Max.) % | ||||||||||||||
| Cr2O3 % | ||||||||||||||
| CaO (Max)% | ||||||||||||||
| Physical Properties | ||||||||||||||
| Product | Low Cement Castables | |||||||||||||
| B.D. (gm/cc) Min. 1100C/24 hrs | 2.6 | 2.7 | 2.9 | 3.2 | 2.35 | |||||||||
| C.C.S. (Kg./cm2) Min. / 1100C | 750 | 800 | 850 | 900 | 400 | |||||||||
| C.C.S. (Kg./cm2) Min. Drying @8000C / 3 hrs soaking | 800 | 860 | 950 | 1000 | ||||||||||
| C.C.S. (Kg./cm2) Min. Drying @11000C / 3 hrs soaking | 900 | 950 | 1050 | 1150 | ||||||||||
| C.C.S. (Kg./cm2) Min. Drying @15000C / 3 hrs soaking | 1000 | 1000 | 1150 | 1150 | ||||||||||
| Thermal Conductivity (k cal/m/hrs0C) | 1.2 | 1.29 | 1.8 | 2.3 | ||||||||||
| P.L.C. max at 15000C | -0.8 | -0.7 | ±0.8 | ±0.8 | -1.2 | |||||||||
| Shelf Life (months) | 3 | 3 | 3 | 3 | 3 | |||||||||
| L.B.D. (gm/cc) Min. | ||||||||||||||
| Skull Removal | ||||||||||||||
| Grain Size (mm) Max. | 6 | 6 | 6 | 6 | 3 | |||||||||