Commercial utilization of waste/low-grade iron ore fines in SAIL mines

Dayal, V and Pan, S K and Mukherjee, S K and Rai, S (2010) Commercial utilization of waste/low-grade iron ore fines in SAIL mines. In: Proceedings of the XI International Seminar on Mineral Processing Technology (MPT-2010), Dec 2010, NML Jamshedpur, India.

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The use of high-quality iron ore, leaving out low-quality overburden, has resulted in huge accumulation of dumped rejects over the years. Due to limited beneficiation facilities available at SAIL mines the accumulated stockpiles of so-called waste dumps are consuming lot of space, putting pressure on environment and creating pollution hazard. During the rainy season, these fines, carried by run-off water, spread to the surrounding land thereby reducing the fertility of the soil and leads to deforestation. In SAIL, Dalli iron ore mines have such stockpile having about 12 million tonnes of ore. These so called waste-dumps are no wastes but contain high amount of valuable iron minerals. Compared to our 58% cut-off, the iron ore rejects in advanced countries employing efficient beneficiation techniques contain hardly 35–40% Fe. It is therefore imperative to find ways and means to recover valuable iron minerals from these dumps and thereby conserve our natural resource and reduce the pollution hazard. With above in view, beneficiation amenability studies have been conducted on Dalli dump fines in the Mineral Engineering laboratories of RDCIS, SAIL. Physical, chemical and mineralogical attributes of these ore were analyzed and the beneficiation tests comprising mineral jig, hydro cyclone and Wet High Intensity Magnetic Separator were carried out. Ore fines (less than 10 mm in size) of Dalli mines assaying 56.10% Fe, 6.00% SiO2 and 4.13% Al2O3 could be upgraded to 64.83% Fe 2.64% SiO2 and 1.64% Al2O3 at a yield of 62%.

Item Type:Conference or Workshop Item (Paper)
Official URL/DOI:
Uncontrolled Keywords:Low-grade, Iron ore fines, Beneficiation, Mineral conservation.
Divisions:Mineral Processing
ID Code:2415
Deposited By:Dr. A K Sahu
Deposited On:27 Jan 2011 16:10
Last Modified:15 Nov 2011 16:13
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