2022-Sustainable Industrial Processing Summit
SIPS2022 Volume 11 Poveromo Intl. Symp. Advanced Iron & Steel Making and Production of Ferro-alloys
| Editors: | F. Kongoli, G.Brooks, P. Butterworth, M. Geerdes, Y. Gordon, M. Grant, L. Lu, D. Lu, K. Saito, H. Sohn, T. Usui. |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2022 |
| Pages: | 276 pages |
| ISBN: | 978-1-989820-54-4(CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
CD shopping page
Environmental Load Reduction by Biomass Char Utilization at Iron Ore Sintering Process
Ryo Muroi1; Masaru Matsumura2;1TOHOKU UNIVERSITY, Futtsu-shi, Japan; 2, Futtsu, Japan;
Type of Paper: Regular
Id Paper: 9
Topic: 2
Abstract:
The steel industry occupies for about 14% of CO2 emissions in Japan, and it is necessary to reduce CO2 especially, sintering and blast furnace processes occupies the majority for CO2 emission from steel industry. As blast furnace exhaust gas is used in the downstream process, the target of our study is to reduce CO2 from the sintering process. Most of CO2 emitted from the sintering process comes from coke breeze combustion. It is effective to replace coke breeze with low oxidation iron or biomass as bonding agent. Regarding the former, Fujino et al. examined a method for promoting oxidation of metallic iron and ferrous (Fe2+) oxide.[1]-[4]
In the past, on the other hand, there are few previous studies on the latter. Kawaguchi et al. examined using biomass char sinter pot test[5], and resulted in that shortened sintering time due to the high burning rate of biomass char and maintained product yield by sieving and using large particle char. However, there is no mention of other sintering operating factors or their effects on sinter product quality.
Therefore, in this study, in order to explore the effective use of biomass char, we will examine the NOx emission[6] and sinter quality with its combustion characteristics and heat profile in sinter packed bed, and PKS char was used as biomass char, and its combustion characteristics were investigated by particle size. As a result, it was confirmed that the finer the PKS char showed the faster the burning rate and the lower the NOx conversion rate.
It is suggested that higher combustion rate caused lower oxygen partial pressure in the combustion film near the char particle. Then lower oxygen partial pressure suppressed oxidation reaction of Nitrogen component in the char.
Keywords:
CO2; Charcoal; Ferrous; Iron;References:
[1] K. Fujino et al., Tetsu-to-Hagane, 100(2014), 160[2] K. Fujino et al., Tetsu-to-Hagane, 103(2017), 348
[3] K. Fujino et al., Tetsu-to-Hagane, 103(2017), 365
[4] K. Fujino et al., ISIJ International, 53(2013), 1617
[5] T. Kawaguchi et al., ISIJ International, 53(2013), 1599
[6] E. Kasai et al., Tetsu-to-Hagane, 78(1992), 1005