|
|
|
| Effect of electromagnetic braking on flow field in #br#
tinplate under high casting speed |
| HUANG Caide,HE Wenyuan,LIU Yanqiang,XIAO Maoyuan,#br#
AN Zeqiu,YANG Xiaoshan |
(Steelmaking Department， Shougang Jingtang United Iron and Steel Co., Ltd., Tangshan 063200, Heibei， China)
|
|
|
|
Abstract In order to realize high casting speed production in tinplate, the effects of nozzle angle, nozzle immersion depth, casting speed and magnetic field intensity on characteristics of flow field under the condition FC mold were studied by mathematical model and industrial test. The results show that the electromagnetic force near the narrow surface in the lower magnetic field increases obviously with the increase of nozzle angle, immersion depth and casting speed, and the magnetic field below the nozzle can effectively reduce the erosion of nozzle outlet jet on the narrow surface. The symmetry of flow velocity on both sides of the nozzle was improved after applying magnetic field, and the level profile in mould was relatively stable. When BUwas equal to 0.5BL, the fluctuation of mould level was the smallest. Inclusions decreased significantly by applying magnetic field, the number density of inclusions at the edge > 10 μm decreased from 0.134 to 0.079/mm2, the number density at one quarter decreased from 0.129 to 0.074/mm2, and the number density at the center of width decreased from 0.100 to 0.073/mm2.The average depth of hook decreases from 2.3 to 1.7 mm and the average length of hook decreases from 2.3 to 2.0 mm. The growth of the hook can be inhibited by appropriate electromagnetic parameters. By optimizing the parameters of FC mold, the defects of alumina and mold powder in tinplate are reduced by 77.8% and 82.6% respectively, and the casting speed of 2.0 m/min is realized in industry.
|
|
|
|
|
|
| [1] |
HOU Xin-mei, LIU Yun-song, WANG En-hui. Effect of ladle-lining refractory on non-metallic inclusions in steel[J]. Iron and Steel, 2020, 55(6): 15-24. |
| [2] |
YU Hui-xiang, PAN Ming, YANG De-xin. Behavior of inclusions in ultra-low carbon IF steel during deoxidation and alloying process[J]. Iron and Steel, 2020, 55(6): 46-53. |
| [3] |
NIU Kai-jun, YANG Wen, ZHANG Li-feng, CHU Yan-ping, ZHANG Hong-qi, GUO Zi-qiang. Thermodynamics and industrial practice of formation of inclusions during solidification of tire cord steels[J]. Iron and Steel, 2020, 55(6): 61-67. |
| [4] |
SUN Chao-fan, FANG Yuan, WANG Ya-qing, LIU Wei. Influence of temper rolling reduction rate on microstructure and mechanical properties of TS290 steel[J]. Iron and Steel, 2020, 55(6): 75-79. |
| [5] |
YAN Xue-qiang1,2,ZHENG Wan1,2,WANG Guo-wei1,2,YAN Wen1,LI Guang-qiang1,2. Effect of microporous MgO refractories on steel cleanliness[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(6): 483-490. |
| [6] |
LI Lan-xin1,WANG Min1,JUAN Rong-fei1,BAO Yan-ping1,YANG Jin2. Distribution characteristics of oxides and sulfide inclusions in key areas of gear steel forgings[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(5): 370-376. |
|
|
|
|
