第
7
卷第
4
期
2008
年
12
月
材料与冶金学报
Journal
of
Materials
and
Metallurgy
Vo
l. 7 No.4
Dec. 2008
中薄板坯连铸结晶器钢/渣界面行为数值模拟
王军，于海吱，朱苗勇
(东北大学材料与冶金学院，沈阳
110004)
摘
要:利用
VOF
(volume of
fluid)
方法和
Lagrangian
离散模型模拟了厚度为
135
mm
中薄板坯连铸结晶器
内的钢液流动及钢/渣界面波动行为，分析了结晶器宽度、水口浸入深度、水口侧孔倾角、拉速和吹氢对结
晶器内钢液流动和液面波动的影响规律.结果表明:钢液从三孔浸入式水口流入结晶器后形成上、下三个回
流区;吹置使结晶器上回流区靠近水口附近形成二次涡流;在一定拉速下，增加水口侧孔倾角和浸入深度均
能有效抑制钢/渣界面、波动;增加拉速和在一定拉速下增加结晶器宽度均将加剧液面波动.
关键词:中薄板坯;连铸结晶器;吹氧;钢/渣界面;数值模拟
中图分类号
TF
777.1
文献标识码
:A
文章编号
1671-6620
(2008)
04
-0
243
-0
6
Numerical simulation of interfacial behaviour between molten steel and
slag' in medium - thin slab continuous casting mold
WANG
Jun
,
YU
Hai-qi
,
ZHU
Miao-yong
(School
of
Materials
and
Metallurgy
,
Northeastern
University
,
Shenyang
110004
,
China)
Abstract:
The
flow
field
of
molten steel and the interfacial behaviour between molten steel and liquid slag in a medium
- thin slab contirtuous casting mold with 135mm thickness were'simulated
by
using the VOF (volume of fluid) method
and Lagrangian discrete phase model
, and the effects
of
mold width , nozzle submergence depth and
po
口
angle
，
casting
speed , and argon gas injection
on
the
flow
and the level fluctuation of molten steel were investigated. The results
show
that the molten steel
from
the submerged entry nozzle with three ports
flows
into the mold and forms three re -
circulation zones including one upper re - circulation zone and
two
lower re - circulation zones. Argon gas injection
results in a secondary vortex
flow
in the upper zone near the nozzle. For a given casting speed , increasing the
downward port angle and submergence depth of nozzle both can restrain the steeVslag interfacial fluctuation effectively.
Increasing the casting speed and mold width with a given casting speed both would worsen the level fluctuation.
Key
words:
medium - thin slab; continuous casting mold; argon
gas
injection; steeV slag interface;
numerical simulation
连铸结晶器内的钢/渣界面波动行为严重影
响连铸最终产品的质量，高拉速连铸更是如此.
如何合理地控制结晶器内的钢液流动和液面波动
状态己越来越受到国内外许多研究者的高度关注
和重视
[1
斗本文以
ASP
(
Anga
吨
strip
productio
川的
135
mm
中薄板坯连铸结晶器及其
生产工艺条件为依据，建立描述结晶器内钢液流
动和钢/渣界面波动搞合分析的数学模型，研究
了结晶器宽度、水口漫人深度和侧孔倾角、拉速
和吹氧等因素对钢液流动和液面波动的影响规
律，为中薄板坯连铸高拉速生产提供理论与现场
收稿日期:
2008
-0
5-30.
指导依据.
1
数学模型
假设结晶器内钢液流动是瞬态不可压缩站性
流动过程;忽略已凝固坯壳和结晶器振动对流动
的影响，忽略结晶器锥度的影响.
1.
1
界面波动模型控制方程
采用
VOF
-(
volume
of
fl.
uid)
方法
[5]
来追踪结
晶器内的钢/渣界面波动.对于不可压缩流体，假
定钢液和液渣密度恒定，则钢液体积分数队
1
应满
足以下连续方程
基金项目:国家自然科学基金委员会和宝钢集团公司"钢铁联合研究基金"项目
(50674020)
.
作者简介:王军(1
968
一)男，辽宁鞍山人，东北大学博士生，
Email:
yh
q9
923100@163.com
;朱苗勇
(1965
一)男，浙江绍兴人，
东北大学教授，博士生导师.
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