Investigation of the production of manganese nanomaterials from fine and low-grade manganese ore by two-stage column flotation technique

ABSTRACT

This study was carried out to investigate the production of manganese nanomaterials by enriching fine and low-grade manganese ores. Fine and low-grade manganese ore sample was obtained from Balıkesir-Mezit-Tumanpınarı region in Turkey. Experimental studies were processed in two different routes. In the first method, optimum enrichment conditions were determined by enriching the ore with a two-stage column flotation method. The optimum flotation time obtained for fine and low-grade manganese ore is 10 minutes. The optimum variables obtained from 10 min column flotation are 60 g/dm³ collector (sodium oleate), 1 g/dm³ depressant (sodium silicate), 3 g/dm³ frother (pine oil) and pH 7 (natural pH of manganese ore). Higher-grade MnO₂ was obtained at the natural pH value of manganese ore. Under the optimum conditions, the concentrate of 76.55% MnO₂ could be recovered by two-stage column flotation from the ore containing 29.9% MnO with the recovery of 90.25%. In the other route, the enriched sample was dissolved and MnCO₃ was obtained by using Na₂CO₃. Then, 400 nm manganese oxide nanorods were produced by roasting MnCO₃.

KEYWORDS:

• Manganese ore
• nanomaterials
• column flotation
• frother
• collector

Acknowledgments

The authors acknowledge the financial support for this study provided by Necmettin Erbakan University Scientific Research Project Fund for Project No. 211231002.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The work was supported by the Necmettin Erbakan University Scientific Research Project Fund [Project No. 211231002].