Shobhana Dey, M K Mohanta
Manganiferous iron ore from Karnataka state was investigated to upgrade the iron content while lowering the manganese in the concentrate. The mineralogical studies revealed that the ore comprises microplaty hematite, martite, goethite, pyrolusite, cryptomelane, and minor amounts of quartz and kaolinite, with the sample containing approximately 51.4% Fe, 4.75% Mn, 8.5% SiO2, and 2.8% Al2O3. The samples, crushed to sizes of 1mm and 3mm, underwent reduction roasting using producer gas, which converted hydrated iron oxides into more magnetic materials, facilitating magnetic separation that left manganese minerals in the non-magnetic faction. Subsequent magnetic separation at a low intensity effectively recovered magnetite from the reduced products. The final concentrate achieved a composition of 64.1% Fe and 2.3% Mn with a yield of 73.5% from the -1mm sample. This upgraded product can be blended with low Mn-hematitic concentrates (65% Fe) to generate suitable pellet feed. The findings underscore the efficiency of reduction roasting in enhancing iron recovery in manganese-rich iron ore processing.
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title={Amenability to Processing of Manganiferous Iron Ore},
author={Shobhana Dey and M K Mohanta},
year={2020},
language={en}
}TY - JOUR TI - Amenability to Processing of Manganiferous Iron Ore AU - Shobhana Dey AU - M K Mohanta PY - 2020 LA - en ER -
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