Behavior of Inclusions in 0.88% Si Non-Oriented Silicon Steel Steelmaking by Process of 100 t Combined Blowing Converter-RH-70 mm Slab Flowsheet

乔智; 秦哲; 廖建军; 施哲; 仇圣桃

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Behavior of Inclusions in 0.88% Si Non-Oriented Silicon Steel Steelmaking by Process of 100 t Combined Blowing Converter-RH-70 mm Slab Flowsheet

更新时间：2026-01-21

- Behavior of Inclusions in 0.88% Si Non-Oriented Silicon Steel Steelmaking by Process of 100 t Combined Blowing Converter-RH-70 mm Slab Flowsheet
- Special Steel Vol. 36, Issue 2, Pages: 1-4(2015)
- 作者机构：
  
  1. 昆明理工大学冶金与能源工程学院,昆明,650093
  2. 钢铁研究总院连铸技术国家工程研究中心,北京,100081
  3. 新余钢铁股份有限公司第二炼钢厂,新余,338001
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：10 October 2014，
  
  Online First：20 August 2022，
  
  Published：20 August 2015
- 稿件说明：
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乔智, 秦哲, 廖建军, et al. Behavior of Inclusions in 0.88% Si Non-Oriented Silicon Steel Steelmaking by Process of 100 t Combined Blowing Converter-RH-70 mm Slab Flowsheet[J]. Special Steel, 2015, 36(2): 1-4.
DOI：

乔智, 秦哲, 廖建军, et al. Behavior of Inclusions in 0.88% Si Non-Oriented Silicon Steel Steelmaking by Process of 100 t Combined Blowing Converter-RH-70 mm Slab Flowsheet[J]. Special Steel, 2015, 36(2): 1-4. DOI：

摘要

0.88%Si无取向硅钢的生产工艺为100 t BOF出钢时加300kg石灰

终点[C

]

0.035%~0.05%

出钢温度1640~1650℃

RH吹氧脱碳

加99.0%Al-Fe合金6.69 kg/t

加70%Si-Fe合金15.70 kg/t

70 mm板坯连铸过程全程保护浇铸

使用镁质碱性中间包覆盖剂。分析结果表明

RH终点[O

]

28×10

-6

铸坯[O

]

22×10

-6

RH-前[N

]

为16×10

-6

RH过程增氮4×10

-6

RH结束到铸坯增氮6×10

-6

RH脱碳终点时钢中夹杂物以球形MnO·Al

为主;RH出站时以不规则形状的Al

为主

并伴有少量单独存在的CaS夹杂;中间包钢液内的夹杂物主要以不规则形状的Al

为主;铸坯中多为不规则形状的Al

以及少量AlN

还有少量由结晶器卷渣引起的含Na成分的复合夹杂物。

Abstract

The production process of 0. 88% Si non-oriented silicon steel is adding 300 kg lime in tapping of 100 t BOF

controlling end [C

]

0.035%-0.05% and tapping liquid temperature 1640-1650 °C

RH blowing oxygen to decarburize

adding 99.0% Al-Fe alloy 6.69 kg/t and adding 70%Si-Fe alloy 15.70 kg/t in RH refining process

in whole process shield-atmosphere casting 70 mm slab

and using magnesia basic tundish shielding agent. Analysis results show that RH end [O

]

is 28 x 10

-6

slab [O

]

is 22 x 10

-6

RH beginning [N

]

is 16 x 10

-6

nitrogen content in liquid increases

by 4 x 10

-6

during RH process and the nitrogen content in steel increases by 6 x 10

-6

during end RH to slab casting process ； at end RH decarburization the main inclusions in steel are spherical

MnO·Al

after RH Refining the main inclusions in steel are irregular

accompanied by a small amount CaS inclusions ； the main inclusions in liquid of tundish are irregular

in casting slab the most inclusions are irregular

with a small amount of AIN and minor composite inclusions containing Na caused by slag enclosure in mold.

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