Estimation of ore mineralogy from analytical analysis of iron ore

A pressing issue that has often been the topic of discussion in iron-making operations in India is the high content of alumina in the country’s iron ore deposits. The presence of alumina has hampered production by affecting slag fluidity, and thereby the hot metal quality. Iron ores from Indian mine...

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Bibliographic Details
Published in:Minerals & Metallurgical Processing 2015-05, Vol.32 (2), p.97-101
Main Authors: Mohanan, S., Bhoja, S. K., Kumar, C. R., Kumar, A., Venugopalan, T.
Format: Article
Language:English
Subjects:
Alumina
Aluminum oxide
Analytical chemistry
Chemical analysis
Decomposition
Engineering
Estimating
India
Iron
Iron compounds
Materials Engineering
Mathematical models
Metallic Materials
Methods
Mineral Resources
Mineralogy
Minerals
Scanning electron microscopy
Special Focus on Iron Ore Processing
Steel industry
Steel products
Temperature
Trends
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Summary:A pressing issue that has often been the topic of discussion in iron-making operations in India is the high content of alumina in the country’s iron ore deposits. The presence of alumina has hampered production by affecting slag fluidity, and thereby the hot metal quality. Iron ores from Indian mines are generally rich in hematite, with traces or small amounts of goethite/limonite, kaolinite, gibbsite and quartz reported from time to time. In day-to-day production, emphasis is placed on checking the chemical analysis of product samples, but the true solution to the alumina problem lies in estimating the mineralogy of the ore samples. We developed a mathematical model, based on singular value decomposition, to predict mineralogy from classical chemical analysis. We then used X-ray diffraction patterns, scanning electron microscope analysis, and grain counting with an optical microscope to determine actual mineral compositions and to test the values predicted by the model. The results indicate that with regular calibration, the model can be used as a simple, fast and effective tool to predict on a regular basis the mineralogy of multiple samples.
ISSN:2524-3462
0747-9182
2524-3470
DOI:10.1007/BF03402426