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Evaluation of pyrolusite flotation behavior using a cationic collector

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Abstract

Floatability of pyrolusite from an Iranian low grade manganese ore (13.6% MnO) containing calcite as the main gangue mineral was investigated with Armac C as a cationic collector. In the single mineral flotation experiments, the maximum recovery of pyrolusite is obtained at 82.2%, using 2000 g/t Armac C at a pH of 9, while at these conditions the flotation recovery of calcite is almost 78%. Quebracho and sodium hexa methaphosphate (SH) depress both minerals strongly at a wide range of dosages while low dosages of sodium silicate and zinc oxide depress the calcite mineral more than pyrolusite. Ca2+ ions affect the flotation recovery of pyrolusite negatively. The effective depression of calcite occurs using 1000–2000 g/t sodium silicate. However, in the ore flotation experiments, the favorable selective flotation of pyrolusite does not occur but the optimal concentrate containing 21.5% MnO with 51% recovery is obtained using 2000 g/t collector and 1000 g/t sodium silicate. A concentrate containing 37% MnO is achieved by carrying out flotation experiments on the jigging pre-concentrate under optimal conditions including pH = 9, 1000 g/t Armac C, 1000 g/t sodium silicate and 120 g/t pin oil.

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Authors and Affiliations

  1. Department of Mining and Metallurgical Eng., Amirkabir University of Technology, 424 Hafez Ave, Tehran, 15875-4413, Iran

    Akbar Mehdilo & Mehdi Irannajad

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  1. Akbar Mehdilo
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  2. Mehdi Irannajad
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Correspondence to Mehdi Irannajad.

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Mehdilo, A., Irannajad, M. Evaluation of pyrolusite flotation behavior using a cationic collector. J Min Sci 50, 982–993 (2014). https://doi.org/10.1134/S1062739114050184

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