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Low cement castable refractory
Low cement castable refractory (LCC) refers to castable with low cement content that between 5%-7%, less than 1% cement content is called ultra low cement. The ultra low cement corundum mullite castable produced by us takes super corundum (or high alumina bauxite), α-Al2O3 micro powder, cement as raw materials, mixed with a certain ratio of binder.
Our company produces varies of low cement castables (LLC), include high alumina LLC, mullite LLC and corundum LLC.
The ultra low cement corundum mullite castable with features of high density, low porosity, high strength, good wear resistance, strong erosion resistance and good volume stability etc. It is widely used in heating furnace, tap hole of blast furnace, hot metal pretreatment and cement rotary kiln lining etc.
Low cement castable refractory features:
1. Lower porosity, good compactness and high density
2. High bending and compressive strength, good wear resistance
3. Excellent chemical stability, good acid-base erosion resistance
4. High refractoriness and stable high temperature performance
| Product name | High-alumina low cement castable | Corundum based low cement castable | ||||
| Brand | G-15 | G-16 | G-17 | G-18S | G-18 | |
| The highest working temp (℃) | 1500 | 1600 | 1650 | 1700 | 1750 | |
| Bulk density 110℃ dry off (g/cm3) ≥ | 2.6 | 2.65 | 3 | 3 | 3 | |
| Chemical content (%) | Al2O3 (%) ≥ | 75 | 78 | 90 | 92 | 93 |
| SiO2 (%) ≤ | 20 | 15 | 6 | 4 | 1 | |
| Bending strength (MPa) ≥ | 110℃×24h | 8 | 10 | 13 | 13 | 8 |
| 1100℃×3h | 12 | 13 | 14 | 15 | 9 | |
| 1500℃×3h | 14 | 14 | 16 | 16 | 13 | |
| Cold crushing strength (MPa) ≥ | 110℃×24h | 80 | 100 | 100 | 100 | 80 |
| 1100℃×3h | 130 | 140 | 150 | 160 | 120 | |
| 1500℃×3h | 140 | 150 | 160 | 170 | 130 | |
| Reheat linear change (%) | 1100℃×3h | ±0.1 | ±0.1 | ±0.1 | ±0.1 | ±0.1 |
| 1500℃×3h | ±0.3 | ±0.3 | ±0.3 | ±0.3 | ±0.3 | |
| Water content for construction (%) | 5.5 | 5.5 | 4.0-4.5 | 4.5 | 4.5 | |
| Application | Cement rotary kiln mouth, kiln hood, cooler and other industrial kiln lining | Cement rotary kiln mouth, coal-injection duct and other industrial kiln lining | ||||
