Steelmaking Ladle Purging Plug is a refractory component designed for gas purging and molten steel treatment in steelmaking ladles. Installed at the bottom of a ladle, the purging plug allows controlled inert gas to pass through the molten steel, promoting effective stirring and helping improve temperature and chemical uniformity during secondary refining.
Manufactured from high-performance refractory materials with a robust steel construction, the ladle purging plug is designed to operate under severe thermal, mechanical and chemical conditions. Its controlled gas permeability supports stable gas flow while the refractory body provides resistance to molten steel, slag and repeated thermal cycling.
During ladle refining, effective gas purging can help improve the interaction between molten steel and slag, promote the removal of inclusions and support more consistent steel quality. The appropriate purging plug grade can be selected according to operating temperature, refining conditions, gas pressure and service requirements. Xintai supplies different grades of steelmaking ladle purging plugs with customized dimensions and designs available for different ladle systems.
Technical Specifications
| Item | T-80 | T-85 | X-85 | M-85 | Z-85 |
|---|---|---|---|---|---|
| Al₂O₃ Content (%) | ≥ 80 | ≥ 85 | ≥ 85 | ≥ 85 | ≥ 85 |
| Al₂O₃ + Cr₂O₃ + MgO (%) | ≥ 92 | ≥ 92 | ≥ 90 | ≥ 92 | ≥ 92 |
| Bulk Density (g/cm³) | ≥ 2.3 | ≥ 2.4 | ≥ 2.5 | ≥ 2.4 | ≥ 2.5 |
| Rupture Strength (MPa) | ≥ 10 | ≥ 12 | ≥ 14 | ≥ 12 | ≥ 15 |
| Thermal Shock Resistance (T₁) | 1650°C | 1680°C | 1700°C | 1680°C | 1680°C |
| Air Permeability (cm³/s) | ≤ 0.2 | ≤ 0.1 | ≤ 0.1 | ≤ 0.1 | ≤ 0.1 |
Key Features
- High Thermal Shock Resistance: Designed to withstand rapid temperature changes during ladle preheating, steel tapping, refining and casting operations.
- Controlled Gas Permeability: Provides stable gas passage through the refractory body for effective molten steel stirring and purging.
- High Refractory Performance: High Al₂O₃ and combined Al₂O₃-Cr₂O₃-MgO compositions provide resistance to high-temperature operating conditions.
- Strong Mechanical Performance: High rupture strength helps the plug withstand mechanical stress during installation and operation.
- Excellent Durability: The refractory structure is designed to resist molten steel, slag erosion and thermal cycling.
- Stable Steel Refining: Controlled gas purging supports improved molten steel mixing and helps promote inclusion removal during secondary refining.
- Multiple Material Grades: T-80, T-85, X-85, M-85 and Z-85 grades are available for different operating requirements.
- Custom Manufacturing: Dimensions, connection structure and plug design can be customized according to ladle specifications and customer drawings.
Typical Applications
- Ladle Refining: Steelmaking ladle purging plugs are widely installed at the bottom of refining ladles to introduce inert gas into molten steel. The resulting gas bubbles and stirring action help improve the uniformity of temperature and chemical composition.
- Secondary Steelmaking: During secondary metallurgy, gas purging is used to support molten steel treatment processes. A properly selected purging plug helps maintain stable gas flow under high-temperature operating conditions.
- Continuous Casting: The purging plug can be used as part of the ladle system supporting continuous casting operations. Effective gas stirring before casting can contribute to improved steel cleanliness and more stable molten steel conditions.
- Molten Steel Gas Purging: The refractory plug provides a controlled pathway for gas to enter the molten steel. Gas flow parameters can be selected according to the steel grade, ladle capacity and refining process.
- Steel Plant Ladle Systems: The product is suitable for different industrial ladle configurations and can be manufactured according to specific dimensions, installation structures and operating requirements.
Production Details
Our Steelmaking Ladle Purging Plugs are manufactured using selected refractory raw materials and controlled production processes to achieve consistent physical and thermal properties.
The production process includes raw material preparation, precise batching and mixing, molding, drying and high-temperature firing. The refractory body is processed to achieve the required density, strength, thermal shock resistance and air permeability.
Quality control is carried out throughout the production process. Finished purging plugs are inspected according to the required technical specifications, including chemical composition, bulk density, rupture strength, thermal performance and air permeability.
For customized orders, production parameters can be adjusted according to the customer’s ladle drawings, dimensions, gas-flow requirements and operating conditions.
Packing and Shipping Details
- Packaging: Each ladle purging plug is carefully packed with moisture-resistant and impact-resistant materials to protect the refractory component during transportation and handling.
- Pallet Packing: Products can be packed on fumigated wooden pallets or according to customer packaging requirements.
- Protective Packaging: Additional protection can be provided for the refractory body and steel components according to the transportation method.
- Shipping: Air freight, sea freight and land transportation are available according to destination, order quantity and delivery requirements.
- Lead Time: Standard orders generally require approximately 3–4 weeks, depending on specifications, order quantity and production schedule.
- International Delivery: Products can be supplied for overseas steel plants and refractory distributors, with customized packing and shipping arrangements available.
Frequently Asked Questions (FAQ)
Q1: What is a steelmaking ladle purging plug?
A steelmaking ladle purging plug is a refractory component installed at the bottom of a steel ladle. It allows inert gas to enter molten steel for stirring, mixing and refining during secondary steelmaking.
Q2: What gas is normally used with a ladle purging plug?
Inert gases such as argon are commonly used for molten steel purging. The appropriate gas and flow rate depend on the steelmaking process, ladle capacity and refining requirements.
Q3. What are the main benefits of a ladle purging plug?
A properly selected purging plug can provide controlled gas flow, improve molten steel mixing, support inclusion removal and help achieve more consistent temperature and chemical composition during refining.
Q4: Can the ladle purging plug be customized?
Yes. Dimensions, shape, connection structure and other design requirements can be customized according to the ladle configuration, operating conditions and customer drawings.
Q5: How do I select the right ladle purging plug?
Selection should consider ladle size, steel grade, refining process, operating temperature, gas pressure, required gas permeability, installation dimensions and expected service conditions. Customers can provide drawings or technical specifications for recommendation.
