Evolution of Liquid Cleanliness of Pipeline Steel in Refining and Casting Process of 220t BOF-LF-VD-Slab CC Flowsheet

杨光维; 王新华

您当前的位置：

首页 >

文章列表页 >

Evolution of Liquid Cleanliness of Pipeline Steel in Refining and Casting Process of 220t BOF-LF-VD-Slab CC Flowsheet

更新时间：2026-01-21

- Evolution of Liquid Cleanliness of Pipeline Steel in Refining and Casting Process of 220t BOF-LF-VD-Slab CC Flowsheet
- Special Steel Vol. 38, Issue 2, Pages: 60-63(2017)
- 作者机构：
  
  1. 宝山钢铁股份有限公司研究院,上海,201900
  2. 北京科技大学冶金与生态工程学院,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：29 October 2016，
  
  Online First：23 July 2022，
  
  Published：23 July 2017
- 稿件说明：
移动端阅览
杨光维, 王新华. Evolution of Liquid Cleanliness of Pipeline Steel in Refining and Casting Process of 220t BOF-LF-VD-Slab CC Flowsheet[J]. Special Steel, 2017, 38(2): 60-63.
DOI：

杨光维, 王新华. Evolution of Liquid Cleanliness of Pipeline Steel in Refining and Casting Process of 220t BOF-LF-VD-Slab CC Flowsheet[J]. Special Steel, 2017, 38(2): 60-63. DOI：

摘要

试验X52管线钢（/%:0.070~0.079C，0.22Si，1.29~1.32Mn，0.008~0.009P，0.002S，0.028A1，0.0016~0.0017T[O

]

，0.0053~0.0065N）的冶金流程为铁水预处理-220t BOF-LF-VD-230 mm板坯连铸。主要工艺为BOF出钢加铝粒，LF精炼渣主要组成为（/%）:54.41~58.54CaO，7.66~8.42SiO

22.57~24.69Al

4.15~4.58MgO，0.78~2.89FeO；VD后喂钙线处理。利用电子束和X-射线技术的ASPEX自动扫描电镜研究了该钢冶炼过程夹杂物的变化。结果表明，LF进站时钢中夹杂物为簇群状或颗粒状Al

LF终点

转变为球状CaO-MgO-

系夹杂物，钙处理后转变为球状CaO-

-CaS系。VD真空处理过程夹杂物数量从30~35个/mm

降至7~15个/mm

、T[O

]

和[N

]

大幅降低至12×10

-6

~13×10

-6

和41×10

-6

~48×10

-6

。软吹搅拌到中间包

钢中夹杂物数量剧增至33个/mm

。夹杂物平均尺寸在VD破空后达到最大

为2.6~3.6μm

中间包则减小到1.9~2.1μm。喂线及软吹搅拌过程钢中T[O

]

和[N

]

都有增加

说明发生了二次氧化。LF精炼、VD及钙处理后钢中S含量降至16×10

-6

。中间包覆盖剂中（SiO

）和（FeO+MnO）太高会导致中间包钢水回硫。

Abstract

The metallurgical flow sheet of tested pipeline steel X52 (/% : 0.070~0.0790

0.22Si

1.29~1.32Mn

0.008~0.009P

0.002S

0.028Al

0.0016~0.0017T[O

]

0.0053〜0.0065N) is hot-metal pretreatment- 220t BOF-LF-VD-230 m

m slab CC. The main steelmaking processes are adding aluminium shot in tapping of BOF； main ingredient of LF refining slag- (/%) : 54.41~58.54CaO

7.66~8.42SiO

22.57~24.69A1

4.15〜4.58MgO

0.78~2.89FeO ； and feeding calcium wire treatment after VD. The evolution of inclusions in steel during steelmaking process is studied by auto scanning electron microscope with ASPEX ( Application Specific Products employing Electron Beam and X-ray technology). Results show that before LF refining the inclusions in liquid are AI2O3 cluster and granule

after LF refining the Al

is modified to globular CaO-MgO-Al

inclusion

then modified to globular CaO-Al

-CaS inclusion after calcium treatment; by VD treatment the number of inclusions in liquid decreases from 30〜35/mm

to 7~15/ mm

and the T[O

]

and [N

]

markedly decrease to 12 x 10

-6

~13 x 10

-6

and 41 x 10

-6

~48 X 10

-6

. from end soft stirring to tundish the number of inclusions in liquid dramatically increases to 33/mm

at end VD the average size of inclusions is up to maximum i. e. 2.6~3.6 μm

but in tundish that decreases to 1.9~2.1 μm: during feeding wire and soft blowing process the T[O

]

and [N

]

increase to some extent

it shows that the secondary oxidation of liquid occurs； with LF refining

VD and calcium treatment the S content in steel decreases lo 16 x 10 ; and the high (SiO

) and ( FeO + MnO) content in tundish shielding flux lead to resulfurization of liquid in tundish.

关键词

Keywords

references

Views

下载量

CSCD

CNKI被引量

Alert me when the article has been cited

提交

Tools

Publicity Resources

Effect of Refining Slag Basicity on the Molten Steel Cleanliness of GCr15SiMn Bearing Steel

Effect of Adding Direct Reduced Iron to EAF on Steelmaking

Effect of Current on the Cleanliness of Electroslag Ingots During Low Frequency Electroslag Remelting

Effect of La-Ce Rare Earth on Inclusions and Impact Properties of Q345D Steel

Research on the Production Practice of 09CuPCrNi Weather Resistant Steel

Related Author

Zhang Guolei

Zhang Tao

Cheng Guoguang

Chen Gang

Qiu Mian

Guo Yunfei

Kang Xu

Nian Baoguo

Related Institution

Shanxi Taizhong Intelligent Equipment Co.， Ltd.

State Key Laboratory of Intelligent Mining Equipment Technology

State Key Laboratory of Advanced Metallurgy， University of Science and Technology Beijing

HBIS Material Technology Research Institute

HBIS Group Zhangxuan Technology，Xuanhua

⁰