
What Is a Tundish Nozzle?
A tundish nozzle meters steel from the tundish during continuous casting. This note covers the alumina body, the zirconia insert and the bore.
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Procurement and technical notes for steel plants buying tundish nozzles, quick-change nozzles and zirconia inserts.

A tundish nozzle meters steel from the tundish during continuous casting. This note covers the alumina body, the zirconia insert and the bore.

A short checklist before you place a tundish nozzle order: drawing, bore, which zirconia sheet, and export packing.

ZhengZhou Nuo Heng Refractory Materials Co.,Ltd makes tundish nozzles in Zhengzhou for export to Europe, the United States, Brazil and more than 25 markets.

The nozzle is made from your drawing: bore, length and outer profile, then the zirconia insert or the quick-change body.

Send the drawing, the bore and the plant country. NUOHENG quotes that nozzle, including sizes outside 10–16.5 mm.

Send the bore or the drawing. NUOHENG replies with a quotation for the tundish nozzle, the zirconia insert or the quick-change nozzle.

Bore is only one dimension. Length and outer profile still have to match the tundish well.

Start from the bore on the caster, not from a catalogue average. The TDS list runs from 10 mm to 16.5 mm.

Before a repeat order, confirm bore, length, outer profile and which nozzle drawing is current.

The tundish nozzle meters steel between tundish and mould. Bore, insert and drawing decide the piece.

The outer body on the tundish nozzle TDS is an alumina refractory. These are the typical figures, kept apart from the zirconia insert.

On a continuous caster the tundish nozzle meters steel from the tundish. The bore, the insert and the seat decide the fit.

The insert is the bore piece. Keep the dedicated specification apart from the typical line on the tundish nozzle TDS.

Use this guide when a quality sheet asks for ZrO₂, density and porosity of the tundish nozzle insert.

Confirm the drawing and assembly size. The refractory chemistry follows the tundish nozzle TDS. The changer geometry does not.