Influence of bottom tuyere configuration on bath stirring in a top and bottom combined blown converter

被引：45

作者：

Lai, Zhaoyi ^{[1
]}

Xie, Zhi ^{[1
]}

Zhoing, Liangcai ^{[2
]}

机构：

[1] Northeastern Univ, Coll Informat Sci & Engn, Shenyang 110004, Peoples R China

[2] Northeastern Univ, Coll Mat & Met, Shenyang 110004, Peoples R China

来源：

ISIJ INTERNATIONAL | 2008年 / 48卷 / 06期

关键词：

combined blown converter; bath mixing time; bottom tuyere configuration; physical modelling; industrial application;

D O I：

10.2355/isijinternational.48.793

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Influence of bottom tuyere configuration on bath stirring in top and bottom combined blown converter was investigated with physical modeling experiments by measuring mixing time of bath. The results showed that asymmetric bottom tuyere configurations have shorter bath mixing time than symmetric bottom tuyere configurations due to their better bath stirring effect. Bath oscillation in converters with too high top gas flow rates would deteriorate the bath stirring and prolong the bath mixing time in the case of asymmetric bottom tuyere configurations. The industrial application data indicated that the converter with asymmetric bottom tuyere arrangement showed better metallurgical results at tapping. Average tapping [O](e) decreased by 160 ppm and average tapping [C](e)x[O](e) reduced from 0.0031 to 0.0025. Average tapping (T.Fe)(e) content in slag decreased by 2.21 %, while average tapping [Mn](e) increased by 0.029%.

引用

页码：793 / 798

页数：6

共 16 条

[1]

Ajmani SK, 1996, IRONMAK STEELMAK, V23, P335

[2]

[Anonymous], J NE U NAT SCI

[3] Evaluation of bottom stirring system in BOF steelmaking vessel using cold model study and thermodynamic analysis [J].

Choudhary, Shiv Kumar ;

Ajmani, Satish Kumar .

ISIJ INTERNATIONAL, 2006, 46 (08) :1171-1176

[4] ROLE OF DISPERSED GAS BUBBLE AGITATION IN STEELMAKING [J].

DAS, AK ;

RAY, HS ;

CHATTERJEE, A .

ISIJ INTERNATIONAL, 1989, 29 (04) :284-290

[5]

FIEGE L, 1983, MPT, V6, P32

[6]

GHOSH DN, 1988, T IRON STEEL I JPN, V28, P659

[7] The effect of bottom nozzle configuration on the bath behaviour in the BOF [J].

Luomala, MJ ;

Fabiritius, TMJ ;

Härkki, JJ .

ISIJ INTERNATIONAL, 2004, 44 (05) :809-816

[8] Physical and mathematical models of gas-liquid fluid dynamics in LD converters [J].

Olivares, O ;

Elias, A ;

Sánchez, R ;

Díaz-Cruz, M ;

Morales, RD .

STEEL RESEARCH, 2002, 73 (02) :44-51

[9]

Oymo D., 1984, P MIX GAS BLOW 4 PRO, P45

[10] MODEL STUDY OF MIXING AND MASS-TRANSFER RATES OF SLAG-METAL IN TOP AND BOTTOM BLOWN CONVERTERS [J].

PAUL, S ;

GHOSH, DN .

METALLURGICAL TRANSACTIONS B-PROCESS METALLURGY, 1986, 17 (03) :461-469

← 1 2 →