|
|
|
| Factors analysis and improvement measures of piling up of cold heading wire rods caused by inclusions |
| SHI Yan-qiu1，CHEN Xiao-hui1，WANG Yue-cong2，WANG Yu-gang1 |
（1. The First Steelmaking Plant of HBIS Group Hansteel Company， Handan 056015， Hebei， China
2. Hanbao Ironmaking Plant of HBIS Group Hansteel Company， Handan 056015， Hebei， China） |
|
|
|
|
Abstract Based on the test results of compositions of piling inclusions and tundish nozzle nodulation， through analysis of the distribution rule of piling heat and inclusion balance calculation in steel making process， it is found that the causes of piling up of cold heading steel wire are excessive Al2O3 inclusions in steel making process， inadequate calcium treatment of refining， and calcium-aluminate and magnesia-alumina spinel etc. solid inclusions accumulating in tundish nozzles and falling into molten steel. Therefore it is needed to take preventive measures corresponding to those factors. Through the measures such as reducing final oxygen content of converter， normalizing the operation of bottom blowing argon of LF refining， controlling Al content in steel making process and extending soft blowing time of refining， etc， the amount of tundish nozzle nodulation reduces obviously and the numbers of piling which is caused by inclusions in steel making process reduce from the original more than 10 times/month down to less than 4 times/month.
|
|
Received: 30 November 2017
Published: 16 March 2018
|
|
|
|
| [1] |
王宝明，潘贻芳等.含铝钢连铸时中间包水口结瘤物的成因分析[J].炼钢, 2008, 24(6):41-43
|
| [2] |
白亚东.减少浸入式水口底部结瘤造成的钢水夹杂的实践 [J].天津冶金，2014, 2: 64-69.
|
| [3] |
吴苏州，张炯明.连铸浸入式水口结瘤现象的研究现状及发展[J].钢铁研究学报, 2007, 19(12):1-4
|
| [1] |
WANG Zhang-yin, JIANG Min, WANG Xin-hua. Formation and evolution of inclusions in Q345D steel during secondary refining process[J]. Iron and Steel, 2022, 57(2): 63-72. |
| [2] |
ZHAO Jia-qi, CAI Xiao-feng, MA Jian-chao, LI Jie, ZHANG Lian-bing. Improvement on mechanism of nozzle clogging caused by CaS inclusions in Al-killed cold heading steel[J]. Iron and Steel, 2021, 56(9): 80-87. |
| [3] |
XIE Yu-min, SONG Ming-ming, MEN Chao-qi, ZHU Hang-yu, MA Guo-jun, XUE Zheng-liang. Influence of Ca treatment on application of rare earth in HAZ during high heat input welding progress[J]. Iron and Steel, 2021, 56(3): 146-153. |
| [4] |
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. |
| [5] |
QIN Zheng-feng, XUE Zheng-liang, LI Jin-bo, LI Bo-si. Origin of large spherical or bar-shaped inclusions in calcium treated steel[J]. Iron and Steel, 2020, 55(5): 31-38. |
| [6] |
YANG Guang-wei, CHEN Zhao-ping, LIU Xiang-chun. Effect of non-calcium treatment on inclusions in high grade case hardening steel[J]. Iron and Steel, 2020, 55(4): 40-44. |
|
|
|
|
2018, Vol. 37 
