Refractory Ladle Purging Plug is designed to support molten steel treatment by introducing controlled inert gas through the bottom of a steelmaking ladle. During secondary metallurgy, effective gas stirring helps improve the movement and mixing of molten steel, creating more uniform temperature and chemical composition throughout the ladle.
Stable gas purging is an important part of producing cleaner steel. As gas bubbles rise through molten steel, they promote circulation and can assist the transfer of non-metallic inclusions toward the slag layer. This helps support improved molten steel cleanliness and more consistent refining conditions.
Manufactured from high-performance refractory materials combined with a durable steel structure, Xintai refractory ladle purging plugs are engineered for demanding ladle environments. The refractory working section is designed to withstand high temperatures, thermal cycling, molten steel contact and slag attack while maintaining controlled permeability.
For steel plants with specific ladle designs or refining requirements, customized dimensions and structures can be manufactured according to technical drawings and operating parameters.
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-Performance Refractory Body: The purging plug uses high-quality refractory materials formulated for high-temperature steelmaking environments. The refractory structure provides resistance to thermal stress and contact with molten steel and slag.
- Stable Gas Permeability: Controlled air permeability is important for maintaining consistent gas flow through the plug. Stable permeability helps provide predictable stirring performance during ladle treatment.
- Strong Resistance to Thermal Cycling: The purging plug is exposed to significant temperature changes during preheating, steel filling, refining and casting. Its refractory structure is designed to withstand repeated thermal cycling.
- High Mechanical Strength: A strong refractory body helps the plug maintain structural integrity under the mechanical and thermal stresses encountered during installation and steelmaking operations.
- Support for Cleaner Steel: Effective gas stirring can improve molten steel circulation and support the removal of non-metallic inclusions, contributing to improved steel cleanliness and more stable refining conditions.
- Customized Ladle Purging Solutions: The plug dimensions, structure and installation configuration can be customized according to ladle drawings, equipment requirements and customer specifications.
Typical Applications
- Secondary Metallurgy: The refractory ladle purging plug is commonly used during secondary steelmaking processes where controlled gas stirring is required to improve molten steel uniformity and cleanliness.
- Ladle Refining: During ladle refining, gas purging promotes molten steel circulation and supports the interaction between molten steel and slag. This can help improve refining efficiency and inclusion removal.
- Clean Steel Production: For applications where steel cleanliness is important, effective gas stirring can support the removal of non-metallic inclusions and improve the consistency of molten steel before casting.
- Continuous Casting Preparation: The purging plug can be used during ladle treatment before molten steel enters the continuous casting stage. Stable refining conditions help prepare the steel for a more consistent casting process.
- Steel Plant Ladles: The product is suitable for industrial steelmaking ladles of different configurations. Custom dimensions and installation structures can be supplied according to individual ladle designs.
Production Details
Xintai manufactures refractory ladle purging plugs through controlled refractory production processes designed to achieve stable physical and chemical properties.
The production process includes raw material selection, batching, mixing, molding, drying and high-temperature firing. Each stage is carefully controlled to achieve the required refractory composition, density, mechanical strength and thermal performance.
Special attention is given to the gas-permeable working section because its permeability directly influences gas distribution during molten steel treatment. Finished products are inspected according to applicable technical requirements, including chemical composition, bulk density, rupture strength, thermal shock resistance and air permeability.
For customized orders, production can be adjusted according to customer drawings, ladle dimensions, gas-purging requirements and operating conditions.
Packing and Shipping Details
- Packaging: Each refractory ladle purging plug is packed with moisture-resistant and impact-resistant materials to protect the refractory body during transportation.
- Pallet Packing: Wooden pallets or heavy-duty crates can be used according to order quantity and transportation requirements.
- Product Protection: Additional protective materials can be applied to prevent impact or movement during loading and unloading.
- Shipping: Sea freight, air freight and land transportation are available according to destination and delivery requirements.
- Lead Time: Standard orders generally require approximately 3–4 weeks, depending on specifications, quantity and production schedule.
- International Supply: Customized packing and shipping arrangements are available for overseas steel plants, refractory distributors and industrial buyers.
Frequently Asked Questions (FAQ)
Q1: What is a refractory ladle purging plug?
A refractory ladle purging plug is a gas-permeable refractory component installed in the bottom of a steelmaking ladle. It allows inert gas to pass into molten steel during refining and stirring operations.
Q2: How does a ladle purging plug improve steel quality?
Gas introduced through the purging plug creates circulation in molten steel. This can improve temperature and composition uniformity and support the transfer of non-metallic inclusions into the slag phase, contributing to cleaner steel.
Q3. Where is the purging plug installed?
The purging plug is generally installed at the bottom of a steelmaking or refining ladle. The exact installation configuration depends on the ladle design and refractory lining system.
Q4: Can you customize the refractory ladle purging plug?
Yes. Xintai can manufacture customized purging plugs according to customer drawings, dimensions, installation requirements and operating conditions.
Q5: What information should I provide when ordering?
Customers can provide the ladle capacity, purging plug dimensions, installation drawing, required refractory grade, gas type, operating temperature, gas pressure, required quantity and service conditions. These details help determine a suitable specification.
