Zhengzhou Zhongkeda Refractory Materials Co., Ltd
Steel Ladle Refractory Castable
High Strength Ladle Refractory Castable
Premium Castable Material for Steel Ladle Working Linings and Back-up Insulation
Steel Ladle Refractory Castable is a high-performance monolithic refractory specially engineered for use in steel ladles, including the working lining, permanent lining, and back-up insulation layer. Made from high-purity raw materials such as tabular alumina, fused alumina, and low-calcium binders, this product offers excellent thermal shock resistance, high strength, and superior slag resistance, ensuring longer service life in demanding steelmaking environments.
Characters of Steel Ladle Refractory Castable:
•🔥Excellent High-Temperature and Corrosion Resistance：Withstands temperatures up to 1800°C, offering strong resistance to slag and molten steel penetration.Al₂O₃ content ≥ 90%.Service life at the slag line reaches 80–150 heats depending on steel grade.
•🛡️Superior Thermal Shock Resistance：Thermal shock stability of ≥300 cycles (1100°C ↔ water quench),No spalling or cracking observed under test conditions.
•⏱️Fast Installation and Drying：Formed via vibration casting, supports demolding in 24 hours,and ready for use within 48 hours — compared to 7 days with traditional materials.Supports hot repair, reducing ladle downtime.
•📉Low Porosity & High Density：Bulk density ≥ 3.0 g/cm³, apparent porosity ≤ 15%,effectively minimizing the risk of molten steel infiltration.
Typical Applications of Steel Ladle Refractory Castable:
•🏭Ladle Working Lining:Direct contact with molten steel at 1600–1750°C
•🔶Slag Zone:Resists high-basicity slag (CaO/SiO₂≥3)
•⚡Impact Area:Withstands molten steel pouring impact
•🔄Safety Lining Repair:Extends ladle structural integrity
Steel Ladle Castable Categories:
•Al₂O₃-MgO-C Castable:Al₂O₃-MgO-C castable can produce magnesia alumina spinel and significantly enhance corrosion resistance and spall resistance of refractory material, greatly prolong the service life of steel ladle.
•Alumina Magnesia Castable:Alumina magnesia castable are gradually used in steel ladle, the lining service life can reach to 60 times or more, refractory material consumption is reduced by 60%~80%.
•Alumina Magnesia Spinel Castable:Bauxite based alumina magnesia spinel castable contains certain ratio of magnesia alumina spinel, which makes castable's corrosion resistance and spall resistance ability improved greatly, the performance is better than water glass bonded alumina magnesia castable and get excellent using effect in all kinds of steel ladles.
| Item | Alumina magnesia castable | Alumina magnesia castable | High alumina castable |
| Application | Work lining | Work lining | Permanent lining |
| Al₂O₃（%）≥ | 60 | 70 | 60 |
| MgO（%）≥ | 12 | 10 | / |
| C（%） | / | / | / |
| Refractoriness （ºC）≥ | / | / | 1790 |
| RUL （ºC） ≥ | 1200 | 1350 | / |
| LCR % (1400ºC,2h) | 0~2 | 0~2 | 0~0.3 |
| Apparent porosity （%） ≤ | 23 | 25 | 18 |
| CCS （MPa） ≥ | 30 | 30 | 30 |
| Max.working temperature （ºC） | 1700 | 1700 | 1650 |
FAQ:
Q:What is the typical installation process?
A:Our castables are installed by vibration casting or self-flow methods. The typical steps include:
1.Mold preparation
2.Mixing with water
3.Pouring and vibration
4.Curing for 24 hours
5.Demolding
6.Controlled drying and firing
Q: How fast can the ladle castable be put into service?
A: Our quick-drying formulas allow demolding within 24 hours and full service within 48–72 hours, minimizing downtime compared to traditional materials that require 5–7 days.
Q: Can your castables be used for hot repair of steel ladles?
A: Yes, we offer special hot repair castables that allow for on-site thermal patching of ladle linings, effectively reducing operational interruptions.
Q: What is the recommended working temperature of ladle castables?
A:Depending on the grade, our ladle refractory castables can withstand temperatures up to 1800°C, suitable for most steelmaking and refining ladle operations.
Q: Do you provide customized formulations for different steel grades?
A:Absolutely. We can tailor the composition and properties of the castable according to your specific steel grades, ladle design, and working conditions.
Q: Are your ladle castables export-ready?
A:Yes. We are a direct manufacturer in China, specializing in B2B international trade. All products are packaged securely for export, and we provide COA, MSDS, ISO certifications, and technical documentation.
Q: How to get a quote or technical datasheet?
A:Please contact us directly through our product inquiry form, email, or WhatsApp. We offer free consultation, technical support, and custom samples for bulk order evaluations.
