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中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 12    December 2018

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Chemical, physical, thermal, textural and mineralogical studies of natural iron ores from Odisha and Chhattisgarh regions, India
Anand Babu KOTTA, Swapan Kumar KARAK, Mithilesh KUMAR

Department of Metallurgical and Materials Engineering, National Institute of Technology,
Rourkela 769008, Odisha, India

Abstract:The chemical, physical, thermal and texture properties of iron ores from different regions of Odisha and Chhattisgarh regions, India, have been investigated to understand the compositional variations of Fe, Al2O3, SiO2, S and P. They were analyzed for its susceptibility to meet the industrial requirements, for various iron manufacture techniques. Chemical analysis indicated that the majority of the iron ores is rich in hematite (> 90 wt%), poor in gangue (<4.09 wt% SiO2 and <3.8 wt% Al2O3) and deleterious elements (P<0.065 wt% and S<0.016 wt%) in all these iron ores found to be low. XRD peaks reviled that the gangue is in the form of kaolinite and quartz, and same was observed in Fourier transform infrared (FTIR) spectroscopy in the range of 914 to 1034 cm–1. The iron ores were found to have excellent physical properties exemplify with tumbler index (82 wt%–91 wt%), abrasion index (1.27wt%–4.87 wt%) and shatter index (0.87wt%–1.64 wt%). FTIR and thermal analysis were performed to assimilate the analysis interpolations. It was found that these iron ores exhibit three endothermic reactions, which are dehydration below 447 K with mass loss of 0.13 wt% to 1.7 wt%, dehydroxylation at 525–609 K with mass loss of 1.09 wt%–4.49 wt% and decomposition of aluminosilicates at 597–850 K with mass loss of 0.13 wt%–1.15 wt%. From this study, we can conclude that due to its excellent physico-chemical characteristics, these iron ores are suitable for BF and DRI operations.

 

Key words: iron ore; chemical analysis; mineralogy analysis; thermal analysis; textural analysis

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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