TY - JOUR
T1 - Technology for productivity improvement of sintering based on designing of composite granulation and bed structure of sinter mixture
AU - Kamijo, Chikashi
AU - Hara, Masaki
AU - Yamaguchi, Yasuhide
AU - Yoshikawa, Masahide
AU - Kano, Junya
AU - Matsumura, Masaru
AU - Kawaguchi, Takazou
N1 - Publisher Copyright:
© 2013 ISIJ.
PY - 2013
Y1 - 2013
N2 - Recently, an increase in the amount of fine ore, such as Marra Mamba or Brazilian concentrated ultra fine, in raw material of sinter ore lowers the permeability of sintering bed and the yield of the sinter ore. The collapse of voids in the sintering bed will cause these problems although the bed has a porous structure. Therefore, controlling the bed structure by including loosely packed regions and densely packed regions in the same packed bed has been discussed. This new idea is named MEBIOS (Mosaic Embedding Iron Ore Sintering). In this report, permeability improvement techniques based on MEBIOS concept were studied. In order to granulate large dense green balls with ordinary sinter feed ore, mathematical simulation and granulation tests by using pan pelletizers were carried out. The influence of rim height and pan diameter on movement of raw material in pan was investigated. Also, influence of rim height and slope angle on hold-up and influence of residence time on diameter of green balls were studied. Finally, this technique was installed in Wakayama No. 5 sinter plant. As a result, yearly average productivity of 1.41 t/ m2 / h and the use of 135 kg/t-sinter Brazilian concentrated ultra fine ore were achieved with 1 350 MJ/t-sinter heat consumption for sintering in 2011.
AB - Recently, an increase in the amount of fine ore, such as Marra Mamba or Brazilian concentrated ultra fine, in raw material of sinter ore lowers the permeability of sintering bed and the yield of the sinter ore. The collapse of voids in the sintering bed will cause these problems although the bed has a porous structure. Therefore, controlling the bed structure by including loosely packed regions and densely packed regions in the same packed bed has been discussed. This new idea is named MEBIOS (Mosaic Embedding Iron Ore Sintering). In this report, permeability improvement techniques based on MEBIOS concept were studied. In order to granulate large dense green balls with ordinary sinter feed ore, mathematical simulation and granulation tests by using pan pelletizers were carried out. The influence of rim height and pan diameter on movement of raw material in pan was investigated. Also, influence of rim height and slope angle on hold-up and influence of residence time on diameter of green balls were studied. Finally, this technique was installed in Wakayama No. 5 sinter plant. As a result, yearly average productivity of 1.41 t/ m2 / h and the use of 135 kg/t-sinter Brazilian concentrated ultra fine ore were achieved with 1 350 MJ/t-sinter heat consumption for sintering in 2011.
KW - Concentrate
KW - Fine
KW - Green ball
KW - MEBIOS
KW - Pan pelletizer
KW - Separate granulation
KW - Sinter
UR - http://www.scopus.com/inward/record.url?scp=84898036660&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84898036660&partnerID=8YFLogxK
U2 - 10.2355/isijinternational.53.1497
DO - 10.2355/isijinternational.53.1497
M3 - Article
AN - SCOPUS:84898036660
SN - 0915-1559
VL - 53
SP - 1497
EP - 1502
JO - Transactions of the Iron and Steel Institute of Japan
JF - Transactions of the Iron and Steel Institute of Japan
IS - 9
ER -