Journal of Materials Research and Technology Journal of Materials Research and Technology
J Mater Res Technol 2018;7:96-101 DOI: 10.1016/j.jmrt.2017.04.007
Review Article
Effect of calcium ion on the separation of rhodochrosite and calcite
Na Luo, , De-zhou Wei, Yan-bai Shen, Wen-gang Liu, Shu-ling Gao
College of Resources and Civil Engineering, Northeastern University, Shenyang, China
Received 16 March 2016, Accepted 28 April 2017
Abstract

The effect of calcium ion on the separation of rhodochrosite and calcite was systematically investigated based on flotation tests, zeta potential measurements, and scanning electron microscopy analysis. The flotation results showed that the separation of rhodochrosite and calcite was inefficient due to rhodochrosite and calcite being similar in many physical and chemical properties, which could make the separation of rhodochrosite from calcite inefficient. The separation of rhodochrosite and calcite can be significantly improved by adding sodium hexa metaphosphate (SH) because SH could depress calcite flotation while it did not bring an impact on rhodochrosite flotation. However, when calcium ion was added into this flotation system, the separation of rhodochrosite and calcite deteriorated as SH also depressed rhodochrosite flotation under this condition. The solution chemical calculation and scanning electron microscopy analysis illustrated that the formation of calcite precipitation coated on the rhodochrosite surface was the main reason because calcium ion increased the depression effect of SH on rhodochrosite.

Keywords
Rhodochrosite, Calcite, Calcium ion, Flotation, Separation
J Mater Res Technol 2018;7:96-101 DOI: 10.1016/j.jmrt.2017.04.007
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