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Variation of Non-Metallic Inclusions Composition in X80 Pipeline Steel Refined by high basicity slag

Journal of Iron and Steel Research International 2011年第S1期18卷 563-566页

作者： LI Qiang 1,WANG Xin-hua 1,LI Hai-bo 2,HUANG Fu-xiang 1,YANG Jun 1,WANG Wan-jun 1 (1.School of Metallurgical and Ecological,University of Science and Technology Beijing,Beijing 100083,China 2.Shousteel Research Institute,Beijing 100039,China) Univ Sci & Technol Beijing Sch Met & Ecol Beijing 100083 Peoples R China Shousteel Res Inst Beijing 100039 Peoples R China

The transformation of inclusions was studied when control technology of refining top slag in ladle furnace was used in X80 pipeline *** amount of aluminum was added to experimental heats for final deoxidation during BOF tapping,and then the refining top slag with high basicity and strong reducibility was adopted to transform Al 2 O 3 to inclusions with low melting *** results show that the composition of inclusions changes in order of "Al 2 O 3 → MgO-Al 2 O 3 system→ CaO-MgO-Al 2 O 3 system→ CaO-Al 2 O 3 system".And the inclusions after LF refining are liquid or semi-liquid state at the temperature of steelmaking,which are easily removable to obtain high cleanliness steel by collision,agglomeration and flotation.

关键词： transformation of inclusions high basicity top slag removal of inclusions X80 pipeline steel

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Variation of Non-Metallic Inclusions Composition in X80 Pipeline Steel Refined by high basicity slag

Variation of Non-Metallic Inclusions Composition in X80 Pipe...

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第六届国际低合金高强度钢会议

作者： LI Qiang~1,WANG Xin-hua~1,LI Hai-bo~2,HUANG Fu-xiang~1, YANG Jun~1,WANG Wan-jun~1 (1.School of Metallurgical and Ecological,University of Science and Technology Beijing,Beijing 100083,China 2.Shousteel Research Institute,Beijing 100039,China)

The transformation of inclusions was studied when control technology of refining top slag in ladle furnace was used in X80 pipeline *** amount of aluminum was added to experimental heats for final deoxidation during BOF tapping,and then the refining top slag with high basicity and strong reducibility was adopted to transform AlO to inclusions with low melting *** results show that the composition of inclusions changes in order of"AlO→MgO-AlO system→CaO-MgO-AlO system→CaO-AlO system".And the inclusions after LF refining are liquid or semi-liquid state at the temperature of steelmaking,which are easily removable to obtain high cleanliness steel by collision,agglomeration and flotation.

关键词： transformation of inclusions high basicity top slag removal of inclusions X80 pipeline steel

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