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| Heat transfer characteristics in process of hot sinter vertical cooling |
| HUANG Zhucheng1,YANG Yue1,ZHONG Ronghai1,LIANG Zhikai1,HU Bing2,3 |
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Abstract Compared with traditional circulating cooling process,sinter vertical cooling process has the advantages of low air leakage rate and high heat transfer efficiency.A study on the gassolid convection heat transfer characteristics in the process of sinter vertical cooling was carried out in a sintering plant which can offer the hot air and hot sinter using a vertical cooling device. The study shows that the main factors influencing the heat transfer characteristics in the sinter vertical cooling process are the flow rate and the temperature of cooling air. The convection heat transfer coefficient between sinter and cooling air increases with the increasing of the sinter temperature, and also increases with the increasing of the cooling air flow rate and the decreasing of the cooling air temperature. Based on Buckingham theorem, an experimental correlation for describing the heat transfer characteristics between sinter and cooling air is obtained by fitting the experimental data, which can give a good prediction and its average relative error is 7.25%.
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Received: 23 January 2019
Published: 15 November 2019
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2019, Vol. 54 
