Production Practice of 90 t BOF⁃RH⁃CC Process for ZG⁃12 Ultra⁃low Phosphorus Steel

杨丽梅; 印传磊; 马庆丰; 翟万里; 刘从德; 左辉

doi:10.20057/j.1003-8620.2022-00035

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Production Practice of 90 t BOF⁃RH⁃CC Process for ZG⁃12 Ultra⁃low Phosphorus Steel

更新时间：2026-01-21

- Production Practice of 90 t BOF⁃RH⁃CC Process for ZG⁃12 Ultra⁃low Phosphorus Steel
- Special Steel Vol. 44, Issue 1, Pages: 15-18(2023)
- 作者机构：
  
  1. 江苏沙钢集团淮钢特钢股份有限公司 1 技术中心
  2. 炼钢厂,淮安,223002
- 作者简介：
- 基金信息：
- DOI：10.20057/j.1003-8620.2022-00035
  CLC：
- Received：13 May 2022，
  
  Online First：20 January 2023，
  
  Published：20 January 2023
- 稿件说明：
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杨丽梅, 印传磊, 马庆丰, et al. Production Practice of 90 t BOF⁃RH⁃CC Process for ZG⁃12 Ultra⁃low Phosphorus Steel[J]. Special Steel, 2023, 44(1): 15-18.
DOI：

杨丽梅, 印传磊, 马庆丰, et al. Production Practice of 90 t BOF⁃RH⁃CC Process for ZG⁃12 Ultra⁃low Phosphorus Steel[J]. Special Steel, 2023, 44(1): 15-18. DOI： 10.20057/j.1003-8620.2022-00035.

摘要

对钢厂采用90 t转炉冶炼超低磷钢(%/:<0.03C

<0.010P

<0.015S

<0.06Mn

<0.02Cr

<0.02Ni)

转炉终点钢液温度偏低、过氧化严重，需经过LF升温精炼等问题，进行了工艺优化试验研究，结果表明：转炉(0.018%～0.025%P)出钢过程中使用石灰和精炼渣，形成二元碱度为7、<0.5%P2O5炉渣，可使钢包钢水脱磷率达到75%

成品磷含量低于0.010%

冶炼时间缩短3～4 min。同时，转炉吹炼终点钢液温度升高，钢包脱磷率呈降低趋势，转炉最佳终点温度为1630～1655℃。通过采用钢包精炼脱磷技术，超低磷钢冶炼流程缩短为转炉吹炼→RH处理→连铸，减少LF精炼工序。

Abstract

In the light of problems of smelting ultra-low phosphorus steel (%/： <0. 03C、<0. 01 OP、<0. 015S、< 0.06Mn、vO. 02Cr、<0.02Ni)

the lower liquid temperature at 90 t BOF tapping and serious overoxidation of liquid

led to heating refining by LF

are tested and studied by process optimization. The results show that during BOF (0. 018% - 0. 025% P) tapping process by adding lime and refining slag to produce slag with binary alkalinity 7 and P2O5 <0.5%

the dephosphorization rate of liquid in ladle reaches up to 75%

the phosphorus content of finished products is less than 0.010%

the smelting time is shortened by 3 ~ 4 min. At the same time

the dephosphorization rate of ladle decreases with the increase of liquid steel temperature at the end of converter blowing

the BOF optimum end-point temperature is between 1 630 °C and 1 655 °C. By adopting ladle dephosphorization technology

the smelting process of ultra-low phosphorus steel is shortened to converter blowing—►RH treatment—►continuous casting

and the LF refining process is omitted.

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