文档介绍：The Study of Preheating Temperature Field of
Submerged Nozzle
LUO Hui-Xin
Wuhan University of Science and Technology, Wuhan, China, 430081
ZHANG Xue-Jun
Baosteel Group Shanghai Iron & Steel Co., Ltd, Shanghai, China, 200431

Abstract
The Submerged Nozzle (SEN), which is between the tundish and mould, is the most important functional
refractory in continuous casting. The SEN must be preheated enough before casting. There are two kinds of
preheating systems. One is bustion system; the other is Fan system. In this paper, the two transient
heating processes are studied and the temperature distribution and increasing temperature curves are
obtained. The result indicates that under bustion system, the large temperature gradient in axial
direction and low temperature of the neck of the SEN after preheating are the main reason why the neck of
SEN is broken frequently when adopting bustion system to preheat. While under the Fan System,
the distribution of the temperature field is more reasonable and the temperature of the neck of the SEN rises
more highly. So it is a suitable preheating system.
Introduction
The Submerged Nozzle (SEN), which is between the tundish and mould, is the most important functional
refractory in continuous casting. It is affected by violent thermal impact at the beginning of the casting and
the corroding of fluxe