Investigation on Non-Metallic Inclusions in LCAK Steel Produced by BOF-LF-FTSC Production Route

YANG Wen; CAO Jing; WANG Xin-hua; XU Zhi-rong; YANG Jie

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Investigation on Non-Metallic Inclusions in LCAK Steel Produced by BOF-LF-FTSC Production Route

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The behavior of non-metallic inclusions in LCAK(low carbon aluminum killed)steel produced by BOF(basic oxygen furnace)-LF(ladle furnace)refining-FTSC(flexible thin slab continuous caster)production route was investigated.The results showed that,LF refining for LCAK steel could decrease the wT[O] significantly,and the inclusions were modified by Ca treatment,which prevented nozzle clogging efficiently.However,owing to the unstable casting condition in the earlier stage of casting,a severe reoxidation occurred,accompanied with mold slag entrapment.The transformation of non-metallic inclusions during the steelmaking process was Al2O3→MgO-Al2O3 type inclusion→MgO-Al2O3-CaO type inclusion with a CaS ring,and the mechanism of the transformation was proposed and discussed via thermodynamic and kinetic analysis.Besides,to avoid CaS precipitation,the product of w2[Al]×w3[S] in steel should be less than 2.0×10-10 at 1873 K,which remands higher desulfurization ratio during LF refining.

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《钢铁研究学报：英文版》 |2011年第9期|6-12|共8页
作者
YANG Wen; CAO Jing; WANG Xin-hua; XU Zhi-rong; YANG Jie;
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作者单位

School of Metallurgical and Ecological Engineering;

University of Science and Technology Beijing;

Beijing 100083;

China;

No. 1 Steelmaking Plant;

Tangshan Iron and Steel Co Ltd;

Tangshan 063000;

Hebei;

China;

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原文格式 PDF
正文语种 chi
中图分类钢包精炼炉;
关键词
非金属夹杂物; 钢包精炼炉; 生产路线; FTSC; BOF; Al2O3; 薄板坯连铸机; LF精炼;

机译：非金属夹杂物;钢包精炼炉;生产路线;FTSC;BOF;Al2O3;薄板坯连铸机;LF精炼;

Investigation on Non-Metallic Inclusions in LCAK Steel Produced by BOF-LF-FTSC Production Route

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