Tundish Nozzle & Ladle Nozzle

The tundish nozzle is a refractory component used in the continuous casting process of steelmaking. Located at the bottom of the tundish, it controls the flow of molten steel into the crystallizer. Ladle nozzles are typically made of materials such as alumina, Oxid zirkonia, and graphite, possessing properties of high temperature resistance and chemical corrosion resistance, and enabling precise regulation of the molten steel flow rate.

Tundish introduction

The tundish, located between the ladle and the crystallizer, primarily functions to regulate the molten steel flow rate, stabilize the molten steel temperature, and achieve purification and uniform distribution.

Tundish nozzle of physicochemical properties

Chemical and Physical Properties	RSTN-AIC75	RSTN-AIC80	RSTN-AI75	RSTN-Zr96RS	RSTN-Zr65
Al2O3 ≥ %	75	80	94	-85	–
ZrO2≥%	–	–		(Insert) 92-96	65
C≥%	4	4	–	–	–
Apparent porosity ≤	8	7	15	9	20
Bulk density g/m3≥	2.90	2.95	2.95	3.05	3.5
Compressive strength (MPa)≥	60	60	120	80	–
High temperature bending strength (MPa) (1400*0.5h) MPa;z	6	7	15	20	–

Zirconia insert–intergral material only zirocnia material.

Chemical and Physical Properties	RSZR60	RSZR70	RSZR80	RSZR85	RSZR95
ZrO2 ≥ %	60	70	80	90	95
Apparent porosity≤	21	20	18	15	6
Bulk density g/m3 ≥	3.70	3.90	4.0	4.35	5.2
Refractories≥℃	1800	1800	1850	1900	1900

Function of the ladle nozzle

Features of the tundish nozzle

Quick-change tundish sprue nozzles slide rapidly and precisely, without flow deviation or steel leakage.
Excellent corrosion resistance, no significant diameter expansion, dlouhá životnost, and no flow deviation or spillage.
Good thermal shock resistance and excellent explosion resistance.
Custom-made products can be quickly customized according to customer requirements.

Tundish sprue nozzles offer advantages such as heat insulation, reduced nozzle surface temperature, reduced heat loss, lighter weight, increased strength, and extended service life.