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| Analysis and control of slag inclusion defect in QD08 low carbon Al-killed steel |
| JIE Rui-hua，LI Hai，WANG Wen-pei，WANG Chun-yan，YANG Ren-qiang |
| （Wuhu Xinxing Pipes Co.， Ltd.， Wuhu 241000， Anhui， China） |
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Abstract Dissident investigation of slag defects in users at QD08. Through sampling and SEM analysis of "inclusions"， it was found that the main component of "inclusion" was protective slag. In order to reduce these deficiencies， the overall nozzle was cast， the level of the crystallizer was stabilized， the constant casting speed operation was performed， the properties of the protective slag were optimized， and the slag was automatically added. And other measures. The application results show that QD08’s unplanned product rate due to “slagging” defects has been reduced from 0.65% to below 0.07%， and the quality of slabs has been significantly improved. At the same time， from the perspective of user quality objection feedback， slag inclusion defects have also been significantly reduced.
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Received: 10 July 2018
Published: 29 January 2019
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| [1] |
REN Ying, LI Xin-zhe, YUAN Tian-xiang, CHEN Wei, ZHOU Hai-chen, ZHANG Li-feng. Source analysis and control status of slag defects on surface of hot-rolled coil[J]. Iron and Steel, 2022, 57(1): 13-27. |
| [2] |
SONG Zhao-qi, LIU Wei, YANG Shu-feng, LI Jing-she, CHEN Yong-feng, ZUO Xiao-tan. Formation reason and control of Ds inclusions in QD08 steel[J]. Iron and Steel, 2021, 56(12): 68-74. |
| [3] |
ZHU Li-guang, ZHANG Li-min, XIAO Peng-cheng, ZHENG Ying-hui, JIANG Zhao-yang, ZHAO Jian-ping. Analysis and control of slag inclusion defects of low carbon steel slab[J]. CONTINUOUS CASTING, 2020, 39(2): 36-40. |
| [4] |
ZHANG Hong-biao， LI Hai， LU Dong-sheng， JIE Rui-hua. Analysis and control of Ds inclusions in QD08 low carbon Al - killed steel[J]. , 2017, 36(5): 50-53. |
| [5] |
YE Wei，SONG Xiao-ping，ZHOU Yu-hua. Cause analysis on the corrosion of steel for 3087 boiler[J]. Chinese Journal of Iron and Steel, 2016, 34(3): 32-35. |
| [6] |
KANG Lun. Analysis and Treatment of Abnormal Vibration of No. 3 Round Billet Step Cooling Bed in Panzhihua Iron and Steel Group[J]. Chinese Journal of Iron and Steel, 2014, 32(4): 54-57. |
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2018, Vol. 37 
