Optimization of Coke Breeze Segregation in Sintering Bed Corresponding to Deterioration in Iron Ore Quality
Increased demand and the diminishing high grade resources have resulted in a shift to using low grade iron ore in Japanese steel mills. Especially, pisolite ore ratio is quite high. Therefore, decrease in sinter productivity became serious problem with increasing the amount of pisolite ore. To improve the sinter productivity, effective method at the charging device insinteringmachinewasinvestigatedbylaboratoryexperiments. Thefollowingresultswereobtained. 1) It was expected that the keep time over 1200 oC at the middle and bottom layer of the sintering bed decreased in high pisolite ore ratio. On the other hand, in order to preserve the sinter strength, it was suggested that the keep time over 1200oC in sintering must be extended under high pisolite ore ratio. 2) There is the optimum coke segregation degree according to the pisolite ore ratio. It was decreased with increase ofthe pisoliteoreratio.3)To control the coke segregation in the sintering bed, Magnetic Braking Feeder (MBF) was introduced,andtheoperatingconditionswereinvestigatedwiththelaboratory chargingtestsandsinteringpottest.4)Basedonthe fundamental research, MBF has been applied to Keihin No.1 sinter plant, and the productivity was improved by 4.2% under constant sinter strength.
sinter charging device pisolite ore coke segregation sintering bed
Satoshi Machida Koichi Tamura Takahide Higuchi Nobuyuki Oyama Hideaki Sato Kanji Takeda
Steel Research Laboratory; JFE Steel Corporation, Fukuyama 721-8510, Japan East Japan Works; JFE Steel Corporation, Kawasaki 210-0855, Japan Steel Research Laboratory JFE Steel Corporation, Fukuyama 721-8510, Japan Steel Research Laboratory JFE Steel Corporation, Kawasaki 210-0855, Japan
国际会议
The 5th International Congress on the Science and Technology of Ironmaking(第五届国际炼铁科技大会 ICSTI09)
上海
英文
217-221
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）