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Korean Journal of Metals and Materials > Volume 55(12); 2017 > Article
Korean Journal of Metals and Materials 2017;55(12): 896-904. doi: https://doi.org/10.3365/KJMM.2017.55.12.896
장입 슈트 형태에 따른 소결 원료 장입 거동
김강민1, 이기우1, 권재홍1, 정해권2, 한정환1
1인하대학교 신소재공학과
2POSCO 기술연구원 열유체공정연구그룹
Charging Behavior of Sinter Feed according to Types of Charging Chute
Kang-Min Kim1, Ki-Woo Lee1, Jae-Hong Kwon1, Hae-Kwon Jeong2, Jeong-Whan Han1
1Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea
2Thermo fluid and process Research Group, Technical Research Laboratories, POSCO, Pohang 37859, Republic of Korea
Correspondence  Jeong-Whan Han ,Tel: +82-32-860-7543, Email: jwhan@inha.ac.kr
Received: 23 May 2017;  Accepted: 30 August 2017.  Published online: 4 December 2017.
ABSTRACT
In the iron ore sintering process, a thermal imbalance can occur in the sinter feed bed which degrades the quality of the sintered ores. In order to solve this thermal imbalance, it is necessary to control the sizes of the sintering feed charging through the chute by designing an appropriate chute shape, and to improve particle size segregation. In this study, a discrete element method(DEM) simulation was applied to the sinter feed charging process to investigate charging characteristics, such as the escape velocity of particles, size segregation intensity and porosity in the sinter feed bed, depending on the shape of the chute. A charging analysis using three types of chute found that horizontal velocity, segregation intensity and porosity in the lowest position in the bed were the highest when a curved chute was used. Therefore, it seems that a curved chute would be effective for solving the thermal imbalance caused by segregation charging. However, in order to use a curved chute, it is necessary to find a way to maintain uniform permeability in the sinter feed bed.
Keywords: powder processing, segregation, computer simulation, sintering process, DEM.
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