Commercial Production Practice of Steel SA-210A1 for High Pressure Boiler by 100 t EAF-LF-VD Φ 500 mm Bloom Casting Flowsheet

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Commercial Production Practice of Steel SA-210A1 for High Pressure Boiler by 100 t EAF-LF-VD Φ 500 mm Bloom Casting Flowsheet

更新时间：2026-01-21

- Commercial Production Practice of Steel SA-210A1 for High Pressure Boiler by 100 t EAF-LF-VD Φ 500 mm Bloom Casting Flowsheet
- Special Steel Vol. 39, Issue 3, Pages: 25-27(2018)
- 作者机构：
  
  山钢股份莱芜分公司特钢事业部,莱芜,271105
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：30 November 2017，
  
  Online First：02 June 2022，
  
  Published：02 June 2018
- 稿件说明：
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刘鹏. Commercial Production Practice of Steel SA-210A1 for High Pressure Boiler by 100 t EAF-LF-VD Φ 500 mm Bloom Casting Flowsheet[J]. Special Steel, 2018, 39(3): 25-27.
DOI：

刘鹏. Commercial Production Practice of Steel SA-210A1 for High Pressure Boiler by 100 t EAF-LF-VD Φ 500 mm Bloom Casting Flowsheet[J]. Special Steel, 2018, 39(3): 25-27. DOI：

摘要

生产的高压锅炉用钢SA-210A1（/%:0.08～0.11C

0.22～0.24Si

0.72～0.74Mn

0.007～0.010P

0.004～0.005S

0.010～0.015V

0.025～0.035Ti

0.012～0.018Alt）的冶金工艺流程为55%铁水+废钢-100 t EAFLF-VDΦ500 mm坯连铸-轧制成Φ130mm圆钢。通过低铝脱氧工艺-EAF终点控制[C

]

≤0.06%

]

0.006%～0.010%

出钢加石灰12 kg/t

AD粉（/%:10～13A1

55～60Al

5～8SiO

5～8Mg0）3 kg/t

700%Al钢芯铝3 kg/t预脱氧;LF采用5.76～6.06高碱度Al

渣系

LF终点喂0.40 kg/t钙线

软吹≥10 min;中间包钢水过热度15～25℃连铸结晶器和末端电磁搅拌

拉速0.31～0.32 m/min

铸坯缓冷≥48 h等工艺措施

SA-210A1钢中的[O

]

16×10

-6

~24×10

-6

]

65×10

-6

～80×10

-6

[Alt

]

≤0.020%

铸坯和热轧圆钢低倍组织和非金属夹杂物均满足要求

Abstract

The metallurgical process flowsheet of produced steel SA-210A1 for high pressure boiler (/% : 0. 08 ~ 0. 11C

0.22 ~0.24Si

0. 72 ~0.74Mn

0. 007 ~0.010P

0.004 ~ 0.005S

0.010 〜0.015V

0.025 ~ 0.035Ti

0. 012 - 0. 018Alt) is 55% hot metal + scrap- 100 EAF-LF-VD-

500 mm bloom casting-hot rolling to Φ130 mm Round bar. With the process measures including low aluminium deoxidation process- EAF end controlling [C

]

≤ 0. 06% and [P

]

0. 006% ~0. 010%

adding lime 12 kg/t

AD powder (/% : 10 ~ 13A1

55 ~ 60Al

5 - 8SiO

5 ~8MgO) 3 kg/t and 70% Al aluminium cable steel 3 kg/t in tapping liquid for pre-oxidation ； using 5. 76 ~6. 06 high basicity Al

slag series in LF refining

feeding 0. 40 kg/t calcium wire at end of LF and sift stirring for ^10 min； super-heating extent of liquid in tundish 15 ~25 ℃，using mold and end electromagnetic stirring process in casting

casting speed 0. 31 ~0. 32 m/min and casting bloom slow cooling for "48 h

the steel SA-210A1 steel [O

]

is 16 x 10

-6

~24 x 10

-6

]

is 65 x 10

-6

~ 80 x 10

-6

and [Alt

]

is ≤ 0. 020%

the macrostructure and nonmetallic inclusions in casting bloom and hot-rolled round bar all meet the requirements.

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