|
|
|
| Discussion on Proper Secondary Refining Methods of Steel Grades for Cold Rolled Sheets |
| YIN Ruiyu1，WANG Xinhua2 |
| 1. Central Iron and Steel Research Institute, Beijing 100081, China; 2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China |
|
|
|
|
Abstract w(［O］) in liquid steel largely influences the desulphurization rate during ladle refining. To make high desulphurization rate of steels in ladle furnace refining for cold rolled sheets, w(［O］) has to be decreased to a very low level, which easily results in w(［Si］) out off the specification range of the steels. If LF refining is applied to the steels for cold rolled sheets, the contradiction between stirring the liquid steel to accelerate removing of nonmetallic inclusions and preventing reoxidation of the steel by oxidizing slag and the atmosphere is occurred. Hence, high reducing slag should be made, which increases the production cost and slows down the production paces of BOF and continuous casting owing to the increase of the LF refining time. Different from LF, using CAS and RH refining methods, the liquid steels can be strongly stirred while the reoxidation of the steels by the oxidizing slags and atmosphere can be prevented. Also, the production paces of CAS and RH are quicker and easier to match with the paces of BOF and slab continuous casting. So, CAS and RH should be chosen as the main refining method for producing steels for cold rolled sheets.
|
|
Received: 01 January 1900
|
|
|
|
| [1] |
ZHANG Wei-li1,WU Sheng-li1,HU Zhong-jie1,2. Statistical analysis of factors affecting desulfurization rate of activated coke for sintering flue gas[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(4): 281-288. |
| [2] |
YIN Chuan-lei, YANG Li-mei, TIAN Chun-yang, MA Jian-chao. Analysis of KR hot metal desulfurizer escaped and slag agglomeration in agitator[J]. Iron and Steel, 2020, 55(1): 34-37. |
| [3] |
LU Yanan,WU Shengli,WANG Laixin,KOU Mingyin. Analysis of chemical compositions of slag affecting #br#
desulphurization in hot metal of COREX process[J]. Iron and Steel, 2019, 54(9): 33-38. |
| [4] |
LIU Zhen-nan,TAO Dong-ping,YAO Chun-ling,FAN Xing-xiang,ZHANG Song-yuan,LI Ya-dong. Phase equilibrium study and thermodynamic analysis on secondary refining process of titaniummicroalloyed steel[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2019, 31(8): 702-711. |
| [5] |
LIN Chao-yang,ZHU De-qing,GUO Zheng-qi. Application of waste desulphurization catalyst to iron ore sintering#br#[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2019, 31(3): 272-279. |
| [6] |
YAO Jia-bin,LIU Weguo,JU Jiantao,XING Xiangdong,AN Jialiang. Study on desulphurization capacity of CaO-SiO2-MgO-Al2O3-BaO slag systems[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2019, 31(3): 280-286. |
|
|
|
|
2007, Vol. 42 
