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Transformation and Applications of Nitrogen Sealing for Patchhole of Oxygen Lance of Converter
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Ya-ping Zhou1, Xiao-long Zhao1, Xiao-mei Xiang1, Ying Hai2
Science & Technology of Baotou Steel | 2024, 50(1) : 79 - 83
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Science & Technology of Baotou Steel | 2024, 50(1): 79-83
• Equipment and Automation •
Transformation and Applications of Nitrogen Sealing for Patchhole of Oxygen Lance of Converter
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Ya-ping Zhou1, Xiao-long Zhao1, Xiao-mei Xiang1, Ying Hai2
Affiliations
  • 1 Inner Mongolia Baotou Steel Group Design & Research Institute (Co., Ltd.), Baotou 014010, Inner Mongolia Autonomous Region, China
  • 2 Steel-making Plant of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
Published: 2024-02-25
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In this paper, the sealing device for patchhole of oxygen lance is redesigned based on the infinite space submerged turbulent jet theory and characteristic test of dominant frequency of oscillation for double-hole jet aiming at such phenomena as spill over of flue gas and flare-up often occurred at nitrogen sealing at oxygen lance of gasification cooling flue for converter. The new nitrogen sealing device adopts the design of seal chamber and double row of inclined holes are set on nitrogen seal seat as well as the aperture and angle of inclined hole are reasonably designed combining with theoretical calculations. It is applied on new 1# converter of Steel-making Plant of Baotou Steel, in which the phenomenon of “smoking” in process of converting at oxygen lance as well as the frequency of cleaning and changing nitrogen seal cap for operators are reduced so that recovery amount of coal gas is improved. The engineering applications show that the modified sealing device is with such advantages as reasonable design, simple equipment and safe operations.

converter  /  nitrogen sealing of oxygen lance  /  nitrogen
Ya-ping Zhou, Xiao-long Zhao, Xiao-mei Xiang, Ying Hai. Transformation and Applications of Nitrogen Sealing for Patchhole of Oxygen Lance of Converter[J]. Science & Technology of Baotou Steel, 2024 , 50 (1) : 79 -83 .
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  • Receive Date：2023-12-10
  • Online Date：2025-10-23
  • Published：2024-02-25
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  • Received：2023-12-10
Affiliations
    1 Inner Mongolia Baotou Steel Group Design & Research Institute (Co., Ltd.), Baotou 014010, Inner Mongolia Autonomous Region, China
    2 Steel-making Plant 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
species (%)
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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