Reduction of iron ore/empty fruit bunch char briquette composite
Utilization of Malaysian low grade iron ore is an attractive option of domestic iron resource; however, extra energy consumption is required and thus contributes to greenhouse gases. In this study, incorporation of low grade iron ore deposits with oil palm waste as substitution of coke was studied...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
The Iron and Steel Institute of Japan
2013
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/32351/1/isij-nurl_azani.pdf http://irep.iium.edu.my/32351/ https://www.isij.or.jp/journal/isijinternational/?lang=english |
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| Summary: | Utilization of Malaysian low grade iron ore is an attractive option of domestic iron resource; however,
extra energy consumption is required and thus contributes to greenhouse gases. In this study, incorporation
of low grade iron ore deposits with oil palm waste as substitution of coke was studied. Briquette
composites of iron ore and char derived from oil palm empty fruit bunch (EFB) pyrolysis were produced
with minute amount of distilled water. Reduction processes were carried out at 873 K to 1 173 K under
argon atmosphere in an electric furnace for briquette composites with different mass ratio of ore/char. For
kinetic analysis, briquette with 8:2 ore/char ratio was used and reduction was carried out by varying the
residence time. The percentage of reduction was estimated by oxygen removal and considering the
weight loss. The structural and chemical changes of raw materials and briquettes were characterized
using XRD, TG/DTA, and XRF. The results indicate that increasing in temperature, time and EFB char content
in the briquette will increase the percentage of reduction. XRD and XRF results show that the original
iron oxide hydrate has been transformed into partial wustite by several stages and the iron content
increased up to 62.7 wt% for 6:4 ore/char ratio briquette. Kinetic results suggest that reduction of iron is
controlled by gasification of carbon and the activation energy is 43.21 kJ. EFB char appears to be a promising
energy source for replacing part of coal consumption in iron making, and reducing CO2 emission. |
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