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Effect of flame一front speed on the pisolite-ore sintering process.pdf

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Effect of flame一front speed on the pisolite-ore sintering process

lable at ScienceDirect Applied Thermal Engineering 75 (2015) 307e314Contents lists avaiApplied Thermal Engineering journal homepage: www.elsevier .com/locate/apthermengEffect of flame-front speed on the pisolite-ore sintering process Hao Zhou*, Zihao Liu, Ming Cheng, Ruipeng Liu, Kefa Cen State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027 PR Chinah i g h l i g h t s Influence of flame-front speed on sinter quality of pisolite ore is investigated. We examine the influence of flame-front speed on melting, reshaping, and coalescence. We discuss factors controlling flame-front speed in iron ore sintering process. The flame-front speed is proportional to fuel-combustion rate.a r t i c l e i n f o Article history: Received 9 January 2014 Accepted 19 September 2014 Available online 28 September 2014 Keywords: Pisolite ore Flame-front speed Sintering* Corresponding author. Tel.: t86 571 fa E-mail addresses: zhouhao@, itpep /10.1016/j.applthermaleng.2014.09.05 1359-4311/? 2014 Elsevier Ltd. All rights reserved.a b s t r a c t Flame-front speed has a large influence on sinter quality and production. To study the influence of flame- front speed on pisolite-ore sintering, five tests were conducted in a laboratory sinter pot. Through varying mix moisture, flame-front speeds ranging from 23.9 to 27.8 mm/min were obtained. The results revealed that when the flame-front speed increased from 23.9 to 27.7 mm/min, sinter productivity increased from 34.1 to 38.6 t/m2 d at relatively unchanged sinter strength. At higher moisture and flame front speeds, while productivity and TI both deteriorated, suggesting the optimum moisture and flame- front speed for the blend has been past. Similarly, with increasing flame-front speed sinter size distri- bution, as indicated by the Sauter mean size, initially improved but deteriorated as flame-front speed increased further to 27.8 mm/min. Mineralogy studie