Abstract
Processing of Iranian high sulfur iron ore is problematic in minerals industry. The iron ores were studied by the means of polarizing microscopy, chemical analysis, X-ray diffraction. The study shows that the iron ores have high grade of iron, and complex structures. XRD showed that the iron ore consists of metallic minerals such as magnetite with a small amount of hematite and limonite and non-metallic minerals as serpentine, chlorite, and talc. The average particle size of magnetite crystals is 0.182 mm. The ore contains 1.62% sulfur as harmful impurity in form of pyrite mineral. Due to the isomorphism of magnesium and iron, magnetite mono crystal grade is lower than 68%, and difficult to be physically upgraded to a higher-grade iron concentrate using the available mineral processing technologies.
Highlights
With the developed demands on mineral resources, the availability of easy-toupgrade ores are decreasing, and working on hard-to-separate ores became essential
Due to the isomorphism of magnesium and iron, magnetite mono crystal grade is lower than 68%, and difficult to be physically upgraded to a higher-grade iron concentrate using the available mineral processing technologies
In as-received sample, the main valuable metallic mineral is magnetite with the content of 30% - 45%
Summary
With the developed demands on mineral resources, the availability of easy-toupgrade ores are decreasing, and working on hard-to-separate ores became essential. The study of technological mineralogy is the basic work of mineral processing. Many researchers have carried out lots of related research about this work. S. et al carried out the study on the iron mine in Hospet by using microscope, XRD and so on [1]. K. and others discussed the importance of integrated mineralogical characterization in beneficiation of iron ores [2]. Mohanty J. and others studied the mineralogical properties of two low grade siliceous manganese ores in northern Orissa, India and its mineral processing technology and results [3].
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