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Optimization of flotation variables for the recovery of hematite particles from BHQ ore

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Abstract

The technology for beneficiation of banded iron ores containing low iron value is a challenging task due to increasing demand of quality iron ore in India. A flotation process has been developed to treat one such ore, namely banded hematite quartzite (BHQ) containing 41.8wt% Fe and 41.5wt% SiO2, by using oleic acid, methyl isobutyl carbinol (MIBC), and sodium silicate as the collector, frother, and dispersant, respectively. The relative effects of these variables have been evaluated in half-normal plots and Pareto charts using central composite rotatable design. A quadratic response model has been developed for both Fe grade and recovery and optimized within the experimental range. The optimum reagent dosages are found to be as follows: collector concentration of 243.58 g/t, dispersant concentration of 195.67 g/t, pH 8.69, and conditioning time of 4.8 min to achieve the maximum Fe grade of 64.25% with 67.33% recovery. The predictions of the model with regard to iron grade and recovery are in good agreement with the experimental results.

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Authors and Affiliations

  1. CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, 751 013, India

    Swagat S. Rath, Hrushikesh Sahoo & B. Das

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  1. Swagat S. Rath
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  2. Hrushikesh Sahoo
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  3. B. Das
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Correspondence to Swagat S. Rath.

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Rath, S.S., Sahoo, H. & Das, B. Optimization of flotation variables for the recovery of hematite particles from BHQ ore. Int J Miner Metall Mater 20, 605–611 (2013). https://doi.org/10.1007/s12613-013-0773-9

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  • DOI: https://doi.org/10.1007/s12613-013-0773-9

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