| 带钢表面块状黑斑成因及对策 |
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| 引用本文： | 唐勤,刘靖群,董欣欣.带钢表面块状黑斑成因及对策[J].轧钢,2019,36(2):73-75. |
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| 作者姓名： | 唐勤 刘靖群 董欣欣 |
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| 作者单位： | 1.首钢京唐钢铁联合有限责任公司热轧作业部，河北唐山063200；2.唐山科技职业技术学院，河北唐山063001 |
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| 摘 要： | 针对热轧带钢表面存在的块状黑斑缺陷，利用扫描电镜等手段分析了其形貌、成分，得出条块状黑斑的产生是由于F7机架出口处轧制烟尘与水蒸汽混合形成灰垢集聚在F7机架出口下导板上，最后粘附于带钢下表面而形成条块状黑斑。通过加强侧喷和除尘水嘴日常维护，有效控制了带钢表面块状黑斑缺陷.
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| 关 键 词： | 热轧带钢 黑斑缺陷 轧制烟尘 水嘴 |
| 收稿时间： | 2018-03-07 |
Cause analysis and countermeasures for black block mark on surface of hot rolled strip |
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| TANG Qin,LIU Jing qun,DONG Xin xin.Cause analysis and countermeasures for black block mark on surface of hot rolled strip[J].Steel Rolling,2019,36(2):73-75. |
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| Authors: | TANG Qin LIU Jing qun DONG Xin xin |
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| Affiliation: | 1.Hot Rolling Department,Shougang Jingtang United Iron and Steel Co.,Ltd.,Tangshan 063200,China;
2.Tangshan Vocational College of Science and Technology,Tangshan 063001,China |
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| Abstract: | Aimed at the black block mark defect on the hot rolled strip surface,its morphology and chemical composition were analyzed by SEM.It concluded that the black block mark defect was caused by the compound of rolling fume dust and water vapor on the exit roller table after F7 mill,which was sticked on the bottom surface of strip.By enhancing side spray water and making good maintenance for the dust cleaner nozzle,the black block mark defect was effectly avoided. |
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| Keywords: | hot rolled strip black mark rolling fume dust spray nozzle |
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