Practice on First Deslagging Process of Double Slag Dephosphorization in 120 t Top and Bottom Combined Blown Converter

武贺; 李晶; 周朝刚; 蔡可森; 吴国平; 曹余良

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Practice on First Deslagging Process of Double Slag Dephosphorization in 120 t Top and Bottom Combined Blown Converter

更新时间：2026-01-21

- Practice on First Deslagging Process of Double Slag Dephosphorization in 120 t Top and Bottom Combined Blown Converter
- Special Steel Vol. 34, Issue 6, Pages: 30-32(2013)
- 作者机构：
  
  1. 北京科技大学1冶金与生态工程学院，
  2. 钢铁冶金新技术国家重点实验室,北京,100083
  3. 南京钢铁集团公司,南京,210035
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：22 May 2013，
  
  Online First：06 September 2022，
  
  Published：06 September 2013
- 稿件说明：
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武贺, 李晶, 周朝刚, et al. Practice on First Deslagging Process of Double Slag Dephosphorization in 120 t Top and Bottom Combined Blown Converter[J]. Special Steel, 2013, 34(6): 30-32.
DOI：

武贺, 李晶, 周朝刚, et al. Practice on First Deslagging Process of Double Slag Dephosphorization in 120 t Top and Bottom Combined Blown Converter[J]. Special Steel, 2013, 34(6): 30-32. DOI：

摘要

通过对转炉脱磷和碳-磷选择性氧化转变温度的理论分析和计算

在铁水未经脱磷预处理的条件下

进行120 t顶底复吹转炉双渣脱磷生产实践。当铁水平均成分为(/%):4.81C、0.49Si、0.32Mn、0.127P、0.019S的情况下

在转炉冶炼前期(0~360 s)

采用低温(1 330~1 350℃)

较强底吹搅拌[0.030~0.040 m~3/(t·min)]

中等炉渣碱度(2.0~3.0)和高氧化铁(20%~25%)工艺措施

实现一次倒渣的半钢(3.8%C)平均磷含量0.048%和平均脱磷率62.2%的脱磷效果。

Abstract

Based on theoretical analysis and calculation on converter dephosphorization and carbon-phosphorus selective oxidation transformation temperature

in condition of hot metal non-dephosphorizing-pretreatment

the production practice of double slag dephosphorization in 120 t top and bottom combined blown converter has been carried out. As the average analysis of hot metal is (/% ) 4. 81C

0. 49Si

0. 32Mn

0. 127P and 0. 019S

in converter blowing early period (0 ~ 360 s)

with the process measures including more intensifying bottom stirring [ 0. 030 ~ 0. 040 m3/( t·min) ] at lower temperature ( 1 330 ~ 1 350 °C )

medial slag basicity (2. 0 ~ 3. 0) and high ferrous oxide ( 20% ~ 25% )

the average phosphorus content in semi-steel (3. 8%C) after first deslagging process is 0. 048%

i. e. the average dephosphorization rate is 62. 2% .

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