Reduction of briquette composite made of low grade from ore and biomass ash
Mini blast furnace project has been constructed to increase pig iron production for domestic consumption produced by HyL process. Malaysia has no significant high grade iron ore deposit white domestic low grade ore could not utilized for direct reduction process. Beneficiation of the low grade ore...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
South East Asia Iron and Steel Institute
2012
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/29191/ http://irep.iium.edu.my/29191/ http://irep.iium.edu.my/29191/1/reduction_of_briquette_composite.pdf |
| Summary: | Mini blast furnace project has been constructed to increase pig iron production
for domestic consumption produced by HyL process. Malaysia has no significant
high grade iron ore deposit white domestic low grade ore could not utilized for direct reduction process. Beneficiation of the low grade ore containing
crystalline water from Malaysian iron ore deposits is an attractive alternative
resource for domestic iron-making. However, the use of tow grade iron ore in
iron making requires extra energy consumption and contributes to greenhouse
gases. we proposed a series of processes for beneficiation of local iron ore utilizing renewable and environmental friendly agricultural residues from
domestic palm oil industry as an energy source and processing materials.
Briquette composites of iron ore and ash by product of palm oil empty Fruit
Bunch (EFB) pyrolysis were produced with minute amount of water added as
binder. Reduction tests were carried out between 600'c to 900.c under argon
atmosphere in a glass tube furnace. The extent of sample reduction was
estimated by oxygen removal and considering the weight toss. The chemical and
structural changes of iron ore before and after reduction were characterized
using XRD, TG/DTA and SEM. The results showed that increase in reduction
temperature and EFB ash content in the briquette will increase the extent of
reduction. XRD results suggest that the original iron oxide hydrate in the ore
has been converted into hematite after heating at desired temperature due to dehydration process. Hematite was partiality reduced to magnetite and
wustite after reduction and the extent of reduction increased with increasing
ash content. The results also indicate that ash from EFB could be a promising
energy source for upgrading low grade iron ore by producing reducing gas that will replace part of coal in iron making leading to reduction in CO emission. |
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