Brief Introduction
Self-flowing castable is a kind of castable refractory material that can flow and degas without vibration. It is developed on the basis of low-cement and ultra-low-cement castables, and is composed of refractory aggregates, powders and high-efficiency dispersants with a certain particle size distribution. The key is the reasonable use of ultra-fine powder particle size, quantity and high-efficiency dispersants, so that the castable can achieve self-flow and automatic spreading.
Performance characteristics
Self-flowability: It can spread automatically and reach places that vibrating castables cannot reach.
Easy to construct: No vibration or compaction is required during construction, and it can automatically form a uniform and dense structure.
High strength and wear resistance: It has high strength and hardness, and the surface is hard and smooth, not easily affected by wear and scratches.
Corrosion resistance: has good resistance to chemical corrosion and fire resistance.
Reduces Noise Pollution: It significantly reduces noise pollution compared to vibrating castables.
Technical Data
| Item | Index | ||||
| SF90 | SF92 | SF90M | SF90C | ||
| Al2O3 % | ≥90 | ≥92 | / | / | |
| Al2O3+MgO % | / | / | ≥90 | / | |
| Al2O3+Cr2O3 % | / | / | / | ≥90 | |
| Volume density g/cm3 | ≥2.85 | ≥3.05 | ≥2.85 | ≥2.90 | |
| Flexural strength at room temperature MPa | 110℃×24h | ≥4 | ≥6 | ≥5 | ≥5 |
| 1500℃×3h | ≥12 | ≥12 | ≥12 | ≥12 | |
| Compressive strength at room temperature MPa | 110℃×24h | ≥30 | ≥35 | ≥30 | ≥30 |
| 1500℃×3h | ≥90 | ≥90 | ≥70 | ≥80 | |
| Self-flow value mm | 170~210 (self-flow method); 200~220 (jump table method) | ||||
Application
Due to its unique performance characteristics, self-flowing castables are widely used in various occasions that require wear resistance, corrosion resistance, and high temperature resistance, such as continuous casting tundish lining, electric furnace top triangle area, steel outlet, steel ladle, heating furnace, blast furnace tapping channel, etc.