Determination of Optimal Bottom Blowing Angle for Improving Mixing Efficiency and Wall Erosion in Steel-Making Converter: Numerical Modeling and Engineering Application

被引：0

作者：

Chen, Jun ^{[1
,2
]}

Li, Chao ^{[3
]}

Su, Xiaoli ^{[3
]}

Zhang, Hao ^{[1
,2
]}

An, Xizhong ^{[1
,2
]}

机构：

[1] Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China

[2] Northeastern Univ, Engn Res Ctr Frontier Technol Low Carbon Steelmaki, Minist Educ, Shenyang 110819, Peoples R China

[3] Angang Steel Co Ltd, Steelmaking Dept, Bayuquan Iron & Steel Branch, Yingkou 115007, Peoples R China

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2024年 / 55卷 / 06期

基金：

中国国家自然科学基金;

关键词：

GAS-LIQUID PLUMES; STEELMAKING CONVERTER; COLD MODEL; PHYSICAL CHARACTERISTICS; TUYERE CONFIGURATION; MASS-TRANSFER; FLOW; BATH; BEHAVIOR; OPTIMIZATION;

D O I：

10.1007/s11663-024-03306-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In our previous work (Powder Technol, 2024, 433, 119276), an approach of inclined bottom blowing has been proposed. It was found that this novel mode of bottom blowing helps to improve the flow characteristics and mixing effect of bath in bottom blowing converters. In this work, the possibility of applying this bottom blowing technique in top and bottom combined blowing converters is investigated. An Euler-Euler model is adopted to describe top and bottom blown process in a simplified model of a 260 t converter. The accuracy of the model is validated by comparing the numerical simulation results with the previously published experimental results. Then, according to the similarity theory, the size of an actual converter is downsized and based on the downsized model a series of numerical simulations are carried out. The influence of bottom blowing angle on the flow characteristics, mixing efficiency and converter wall erosion are discussed in detail. Numerical simulation results show that the mixing time first decreases and then increases with the increase of the bottom blowing angle. When the bottom blowing angle is 5 similar to 6 deg, the mixing time of molten pool is the shortest because the flow dynamics in the lower part of the bath are effectively improved by using the 6 deg angle for bottom blowing. The wall shear stress is used to characterize the erosion of the converter wall. The study results show that the most severe area of erosion on the converter wall occurs near the liquid surface in the direction of the top jet. The severity of erosion on the converter wall decreases gradually as the bath depth increases. The wall shear stress changes slightly with the angle, which indicates that the novel bottom blowing approach will not aggravate the wall erosion. Combining with the results in this paper and the factory production demand, the actual industrial converter using the 7 deg bottom blowing angle effectively improve the efficiency of smelting.

引用

页码：4956 / 4969

页数：14