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| Properties of High Basicity Mold Fluxes for Peritectic Steel Slab Casting |
| LONG Xiao,HE Sheng-ping,XU Jian-fei,HUO Xu-ling,WANG Qian |
| Chongqing Key Laboratory of Metallurgical Engineering, College of Materials Science and Engineering,Chongqing University, Chongqing 400044, China |
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Abstract In high speed continuous casting of peritectic steel slabs, mold fluxes with high basicity are required for less surface defect product. However, the basicity of remaining liquid slag film tends to decrease in casting process because of the crystallization of 3CaO��2SiO2��CaF2. Thus, a way is put forward to improve mold fluxes�� properties by raising the original basicity. In order to confirm the possibility of this method, the effect of rising original basicity on the properties of mold fluxes is discussed. Properties of high fluorine based mold fluxes with different basicities and contents of CaF2, Na2O, and MgO were measured, respectively. Then, properties of higher basicity mold fluxes were discussed and compared with traditional ones. The results show that increasing the basicity index can improve the melting and flow property of mold fluxes. With the increasing basicity, crystallization rate of mold fluxes increases obviously and crystallization temperature tends to decrease when the basicity exceeds 1.35. The method presented before is proved as a potential way to resolve the contradiction between horizontal heat transfer controlling and solidified shell lubricating for peritectic steel slab casting. But further study on improving the flow property of liquid slag is needed. This work can be used to guide mold fluxes design for high speed continuous casting of peritectic steel slabs.
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Received: 08 April 2011
Published: 25 July 2012
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Corresponding Authors:
LONG Xiao
E-mail: llx580@sina.com
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| [1] |
LI Jian-min������JIANG Mao-fa��. Effect of mold fluxes on slab surface crack for 20Mn23AlV[J]. Chinese Journal of Iron and Steel, 2017, 52(9): 48-53. |
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LONG Xiao,HE Sheng-ping,WANG Qian. Factors influencing roughness of solidified mold flux film for peritectic steel continuous casting[J]. Chinese Journal of Iron and Steel, 2017, 29(7): 551-555. |
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LONG Xiao��HE Sheng-ping��WANG Qian. Experiment on solidification and composition segregation of solidified mold flux film for peritectic steel continuous casting[J]. Chinese Journal of Iron and Steel, 2017, 52(5): 43-46. |
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LUO Yan-zhao��JI Chen-xi��DENG Xiao-xuan��PAN Hong-wei��ZENG Zhi��CUI Yang. Optimization of mold flux to improve surface quality of ultra-low carbon IF steel[J]. Chinese Journal of Iron and Steel, 2017, 52(4): 38-43. |
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HUANG Ting��WEN Guang��hua��BAI Bin��wen��TANG Ping��GAO Jin��xing. Leaching mechanisms of ions from mold flux and its effect on water quality[J]. Chinese Journal of Iron and Steel, 2017, 29(3): 191-194. |
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MA Xiao-mei. Cause analysis of the abnormal failure of the 82B wire rod[J]. Chinese Journal of Iron and Steel, 2017, 35(3): 45-48. |
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2012, Vol. 19 
