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| Solidification Heat Transfer Process and Its Heat Loss of Slab Continuous Casting Based on Matlab |
| FENG Hui-jun,CHEN Lin-gen,DING Ze-min,SUN Feng-rui |
| Institute of Thermal Science and Power Engineering, Military Key Laboratory for Naval Ship Power Engineering, College of Power Engineering, Naval University of Engineering, Wuhan 430033, Hubei, China |
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Abstract Based on numerical calculation with Matlab, solidification heat transfer in slab continuous casting process is carried out, and the temperature field distribution of the slab varying with its thickness and distance to the meniscus of the mould is obtained. The fitting equation of the end position of the slab solidification with respect to the total water flow rate during secondary cooling process, superheat and casting speed is obtained. The effect of the water distribution in the second cooling zone on the heat loss rate per unit length of the mould and second cooling zone as well as the surface temperature gradient of the slab are analyzed. The results show that the change tendencies of the slab temperatures are obviously different at different cooling stages. With the increases in the superheat and casting speed and the decrease in the total water flow rate during secondary cooling process, the end position of the slab solidification increases. The effect of the casting speed on the end position of the slab solidification is more obvious, the effect of the total water flow rate during secondary cooling process is secondary, and the effect of the superheat on the end position of the slab solidification is small. The compromise between the decrement of the surface temperature gradient and the reduction of heat loss rate can be realized by properly adjusting the water distributions in the second cooling zone. The quality and energy storage of the slab are improved simultaneously in this way, and the energy saving of slab continuous casting process is realized. The work in this paper can provide some theoretical guidelines for the parameter designs and dynamic operations of the solidification process of slab continuous casting.
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Received: 06 May 2013
Published: 19 November 2013
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2013, Vol. 32 
