Refractory well blocks play a vital role in the continuous casting process in the steel industry. Made from carefully selected refractory materials, they are able to withstand extreme conditions. Well block refractory is mainly made of materials such as high – alumina, magnesia – aluminum spinel, and refractory castables. The specific refractoriness can be adjusted by changing the composition and proportion of raw materials according to different application requirements. For example, well block refractory with a higher alumina content generally has a higher refractoriness.
| 差异 | Tundish 井区 | 钢包井块 |
|---|---|---|
| 地点 | 鱼缸底部 | 勺底 |
| 主要功能 | 控制钢水流入模具的流速，提高钢水清洁度 | 控制钢水从熔炉进入钢包的流速，有时还能调整钢水成分 |
| 运行阶段 | 连续铸造工艺 | 炼钢和拉伸工艺 |
| 类别 | 技术规格 | 说明 |
|---|---|---|
| 尺寸 | 230 × 114 × 76 毫米（标准） | 可根据窑炉设计进行定制，误差 ±2 毫米 |
| 材料类型 | 高铝耐火砖（Al₂O₃ ≥ 48%） | 选项：标准高铝砖、镁铝合金砖、锆石砖等。 |
| 密度 | 2.2-2.6 克/立方厘米 | 高密度砖的耐磨性更好；低密度砖的隔热性更好 |
| 吸水性 | ≤ 6% | 吸水性更低，更耐用 |
| 抗压强度 | ≥ 80 兆帕 | 在高温条件下保持承重能力 |
| 挠曲强度 | ≥ 20 兆帕 | 抗热应力和机械冲击 |
| 折射率 | 1600-1800 ℃ | 不会软化或开裂 |
| 抗热震性 | ≥ 20 个周期 | 反复加热和冷却也不会开裂 |
| 导热性 | 1.0-2.0 W/m-K | 可选择隔热或导热 |
| 化学成分 | Al₂O₃：48-60%, SiO₂：30-45%, Fe₂O₃ ≤ 2%, CaO+MgO ≤ 3% | 酸性/碱性性能可根据要求调整 |
| 发射条件 | 完全烧结 | 增强强度和耐用性 |
| 表面精度 | 平面度 ≤ 1.0 毫米 | 确保施工精度，减少缝隙 |
Well block refractory features high refractoriness, withstanding over 1770°C. It has strong chemical resistance against acids and alkalis, plus excellent mechanical strength to endure stress and abrasion in high – temp settings.
Well block refractory has multiple applications. In metallurgy, it lines ladles and tundishes, protecting against molten metal’s high heat. In cement production, it’s used in rotary kilns to resist heat and chemical corrosion. In glass manufacturing, it safeguards melting furnaces. Its heat – resistant and durable nature makes it vital for these high – temperature industrial processes.