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Development and Applications of Smelting Process for Low Manganese Steel
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Feng Yang1, Qiang Li2, Zhi-gang Liang3, Nan Huang4, Jian-qiang Liu5, Hai-dong Gao5
Science & Technology of Baotou Steel | 2022, 48(4) : 18 - 21
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Science & Technology of Baotou Steel | 2022, 48(4): 18-21
• Production Practice and Management •
Development and Applications of Smelting Process for Low Manganese Steel
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Feng Yang1, Qiang Li2, Zhi-gang Liang3, Nan Huang4, Jian-qiang Liu5, Hai-dong Gao5
Affiliations
  • 1 Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
  • 2 Inner Mongolia Baotou Steel Rare Earth Steel Plate Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
  • 3 Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
  • 4 Marketing Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
  • 5 Special Steel Branch Co. of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
Published: 2022-08-25
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The armco iron requires the manganese content in steel to be controlled within 0.005%. In order to study the smelting process for low manganese steel, the thermodynamic and dynamic conditions of demanganization reaction are analyzed. The study showed that the lower the temperature of liquid steel was, the higher the oxidizability of slag and oxygen content in steel were as well as the lower the manganese oxide content in slag was, the easier the oxidation reaction of manganese was. When the manganese content in liquid iron is 0.040%~0.055%, the end point carbon content of liquid steel in converter after bessemerizing is controlled at 0.025%~0.035% and final temperature is controlled below 1 620 ℃ so that residual manganese content in liquid steel could be reduced to 0.04%~0.08%. The demanganization rate of liquid steel increases with the quantity of converter slag increases. Without the deoxidation during tapping of converter, the liquid steel and slag in ladle would maintain higher oxidizability. During the refining process in ladle furnace(LF), the manganese content in steel could be reduced by 32% on average and decreasing amplitude is 0.01~0.04 percentage points. The manganese content in steel could be reduced steadily within 0.05% with the combined demanganization processes of converter and LF.

armco iron  /  demanganization reaction  /  carbon content  /  temperature  /  combined demanganization processes
Feng Yang, Qiang Li, Zhi-gang Liang, Nan Huang, Jian-qiang Liu, Hai-dong Gao. Development and Applications of Smelting Process for Low Manganese Steel[J]. Science & Technology of Baotou Steel, 2022 , 48 (4) : 18 -21 .
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  • Receive Date：2022-03-01
  • Online Date：2025-10-20
  • Published：2022-08-25
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  • Received：2022-03-01
Affiliations
    1 Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
    2 Inner Mongolia Baotou Steel Rare Earth Steel Plate Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
    3 Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
    4 Marketing Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
    5 Special Steel Branch Co. of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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