Abstract
As the heart of continuous caster, crystallizer is the cradle of most surface deficiencies and inside quality problems in steel blank. Steel blank surface quality, nonmetal impurity content and relevant distribution rely on the steel fluid solidification behavior namely steel fluid flow field distribution on great extent. For the high temperature steel fluid has big kinetic energy, so, the immixture dregs, solidification heat conduction, temperature field distribution in crystallizer, solidification blank shell thickness distribution and continuous caster blank quality were influenced by steel fluid flow. The numerical simulation analysis on flow field and temperature field in crystallizer were conducted in this paper. Three dimensions turbulent flow model was adopted to computate flow field. The heat conduction was ignored on draw blank direction in temperature field. The conjugate heat conduction model of ANSYS CFX was adopted to analyze temperature field, which can consider heat conduction in solid layer and convection heat conduction between solid shell face and fluid simultaneity. The draw blank velocity was found by setting crystallizer water gap insertion depth and crystallizer water gap angle, which can obtain reasonable flow field in blank crystallizer.
Highlights
The first problem for analyzing temperature field distribution in continuous caster crystallizer is steel fluid flow
Reasonable flow field distribution is benefit to impurity float in steel fluid and prevention dregs immixture [1].The original blank shell and steel fluid temperature distribution in blank shell was influenced by steel fluid flow in crystallizer
Reasonable flow field distribution can increase the homogenization of original blank shell, decrease steel fluid underwashing on blank shell and prevent temperature field from increasing steel fluid temperature too high in blank shell
Summary
The basic parameters of blank continuous caster crystallizer.The basic parameters of blank continuous caster crystallizer were shown in table 1. The linking research of flow and heat conduction phenomenon was conducted by ANSYS. The both side hole and downward obliquity immersion water gap was adopted, which is shown in Fig.1[2]. Basic hypothesis of model The solidification shell in crystallizer was ignored. Steel fluid was treated as homogeneous phase medium. The influence of curved face fluctuation was ignored. The vibration influence on flow was ignored. The steel fluid gravity influence was ignored. Steel fluid flow was driven by initial velocity on water gap exit[3]. The governing equation of steel fluid flow may be shown as:. 1.44,C2 is 1.92, Cμ is 0.09, σ k is 1.0, σ ε is 1.3
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
