ZrO₂ Sliding Gate Plate
Conventional slide plates often experience pore enlargement, erosion pits, cracks, or even steel leakage when exposed to calcium-treated steel or during prolonged casting. Thanks to zirconia’s unique phase transformation toughening and low wettability, zirconia slide plates maintain structural integrity and dimensional stability even under these harsh conditions.
Products Description
Zirconia slide plates are the premier functional refractory material in sliding nozzle systems, specifically designed for demanding continuous casting conditions. They are composed primarily of partially stabilized zirconia (PSZ), combined with high-purity alumina and trace additives, and are manufactured through isostatic or high-pressure pressing followed by high-temperature sintering. They are particularly suitable for high-quality steel grades (bearing steel, gear steel, stainless steel, silicon steel, etc.), long-duration continuous casting, and highly corrosive conditions such as calcium-treated steel.
Parameters
|
|---|
Product Features
Erosion Resistance
Zirconia exhibits an extremely low tendency to react chemically with CaO, MnO, FeO, and alkaline slag in molten steel. As a result, the working surface of the slide plate develops virtually no altered layer during use, and pore enlargement occurs at an extremely slow rate, ensuring long-term precision in steel flow control.
01
Thermal Shock Resistance
Leveraging the phase transformation toughening mechanism of zirconia (t-ZrO₂ → m-ZrO₂), the slide plate effectively absorbs thermal stress and suppresses crack initiation and propagation when subjected to thermal shocks exceeding 300°C/s at the moment of tapping.
02
High-Temperature Resistance
Even at temperatures above 1600°C, zirconia slide plates maintain high flexural and compressive strengths, resisting deformation and jamming to ensure smooth and reliable sliding motion.
03
Low Friction and Wear Resistance
The working surface of the slide plate is precision-ground to achieve a low surface roughness. Combined with zirconia's inherent high hardness and self-lubricating properties, this minimizes wear on the sliding mechanism and extends the overall service life of the system.
04
Long Service Life
Under conditions involving calcium-treated steel, stainless steel, or ultra-long continuous casting, zirconia slide plates have a significantly higher number of service cycles than conventional materials. This effectively reduces unplanned casting interruptions and improves continuous casting operation rates.
05
Our Products
FAQ
Q: Why are zirconia sliders suitable for calcium-treated steel?
A: The calcium in calcium-treated steel reacts with components such as silicon dioxide and aluminum oxide in ordinary sliders to form low-melting-point phases, which accelerates slider erosion. Zirconia is highly chemically inert toward calcium and hardly reacts with it at all; therefore, it effectively resists calcium erosion and maintains stable pore size.
Q: Is preheating required before use?
A: Low-temperature preheating (100°C–200°C) is recommended, especially during seasons with large temperature fluctuations or when using the plate for the first time. Preheating removes adsorbed moisture, reduces thermal shock stress at the moment of pouring, and further extends the life of the slide plate.
Q: How many times can a zirconia slide plate typically be used?
A: The specific number of uses depends on the steel grade, casting temperature, and continuous casting duration. Under conditions involving calcium-treated steel or stainless steel, it is typically 5–8 times; for ordinary steel grades with prolonged continuous casting, it can exceed 10 times. We can provide a service life estimate based on your actual operating conditions.
Q: Can you provide matching top and bottom nozzles?
A: Yes. We also manufacture zirconia or zirconium-based top and bottom nozzles, which, when combined with zirconia slide plates, form a complete erosion-resistant flow control system. This ensures that the service life of all components is matched, delivering optimal overall performance.
Hot Tags: zro₂ sliding gate plate, China, suppliers, factory, buy, quotation, made in China, sliding gate plate with zirconia, gate plate exhibiting zirconia, zirconia based sliding gate plate, zirconia sliding gate subportion component, zirconia contained within gate plate, sliding gate plate consisting largely of zirconia
Send Inquiry
