The Collector Nozzle, also known as Well Nozzle, is a critical component of flow control devices such as slide gates or stopper rods in continuous casting systems. It serves as the final interface between the tundish and the mold, precisely controlling the flow rate, stream shape, and distribution of molten steel or other metals into the mold cavity. Its design is crucial for preventing turbulence, minimizing oxidation, and ensuring uniform solidification. The nozzle is positioned at the outlet of the tundish flow control mechanism. When the slide gate opens or the stopper rod is lifted, molten metal flows through the internal bore of the nozzle. Its tapered or shaped internal geometry transforms the flow into a coherent, controlled stream directed into the center of the mold's pouring well, minimizing splash and air entrapment. Materials on file include alumina-graphite refractory, zirconia-graphite refractory, and fused silica. Key parameters include bore diameter (20–80 mm), overall length (100–300 mm), wall thickness (10–25 mm), tolerance on bore (±0.5 mm, ISO 2768-m), operating temperature (1500–1600 °C), thermal shock resistance (≥30 cycles), material density (2.0–2.5 g/cm³), apparent porosity (15–20%, ISO 5017), cold crushing strength (≥40 MPa, ISO 10059-1), and weight (5–20 kg). These values are reference ranges and must be verified for the specific model and application. The nozzle must withstand high temperatures and thermal cycling; typical failure modes include cracking, erosion, and clogging. Regular inspection for wear and proper alignment is essential. Always confirm model-specific specifications and standards with the legal manufacturer or supplier.
The nozzle is positioned at the outlet of the tundish flow control mechanism. When the slide gate opens or the stopper rod is lifted, molten metal flows through the internal bore of the nozzle. Its tapered or shaped internal geometry transforms the flow into a coherent, controlled stream directed into the center of the mold's pouring well, minimizing splash and air entrapment.
