Based on energy balance, energy-balance equations for gas volume zones, furnace surface zones and slab surface zones were set up by radiation zonal method, by the slab surface heat flow and internal thermal equations coupling solution. And the temperature profiles of gas volume zones and furnace surface zones were obtained by using the main variable correction method, the slabs temperature profiles by finite difference method. The correctness of the model was verified by comparing the slab temperature with the actual situation. The influence of the height of the upper furnace on the temperature field and the exhaust gas temperature of the slab were analyzed. The results showed that for the preheating section height of 0.5~0.9 m, with the height of each increase of 0.2 m, the upper surface temperature before the slab released increased by about 2.8℃, the exhaust temperature decreased by about 10℃. For the first heating section of height of 0.9~1.9 m, with the height of each increase of 0.2 m, the upper surface temperature before the slab released increased by about 2.5℃, the average exhaust gas temperature decreased by 8.5℃. The influence of the height on the temperature of the second heating section and the soaking section were not significant. It can be seen that it was reasonable to determine the height of the preheating section and the heating section to facilitate the heating of the slab and fuel consumption saving.
Hao LI Fangqin DAI Cuijiao DING Yue GUO
. Effect of Furnace Height on Performance of Walking-beam Reheating Furnace[J]. The Chinese Journal of Process Engineering, 2018
, 18(3)
: 551
-556
.
DOI: 10.12034/j.issn.1009-606X.217309
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