Synthesis and characterization of a novel collector for the desulfurization of fine high-sulfur bauxite via reverse flotation--颗粒学报PARTICUOLOGY

Cheng, G., Zhang, J., Su, H., & Zhang, Z. (2023). Synthesis and characterization of a novel collector for the desulfurization of fine high-sulfur bauxite via reverse flotation. Particuology, 79, 64-77. https://doi.org/10.1016/j.partic.2022.11.012

Synthesis and characterization of a novel collector for the desulfurization of fine high-sulfur bauxite via reverse flotation

Gan Cheng ^{a b c *}, Jianqiang Zhang ^a, Huanhuan Su ^a, Zhanyun Zhang ^a

a Zhengzhou Non-ferrous Metals Research Institute Co. Ltd., Aluminum Corporation of China, Zhengzhou, 450041, China
b College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, 454000, China
c Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization, Henan Polytechnic University, Jiaozuo, 454000, China

10.1016/j.partic.2022.11.012

Volume 79, August 2023, Pages 64-77

Received 17 September 2022, Revised 28 October 2022, Accepted 19 November 2022, Available online 2 December 2022, Version of Record 24 January 2023.

E-mail: chenggan464@126.com

Highlights

Abstract

Bauxite is one of the main raw materials in the alumina industry. Fine high-sulfur bauxite flotation desulfurization is a great challenge presently. This study aims to synthesize nanoparticle collectors (NPCs) by emulsion polymerization to improve the abovesaid flotation desulfurization process. The physicochemical properties of high-sulfur bauxite were analyzed, and the experimental conditions for the synthesis of NPCs were optimized. The interaction mechanism between NPCs and pyrite was studied via fundamental analyses including SEM (Scanning Electron Microscope), FT-IR (Fourier Transform Infrared spectoscopy), Zeta-potential, XPS (X-ray Photoelectron Spectroscopy), and wettability. Under the closed-circuit flotation flowsheet of “one roughing-two cleaning-three scavenging”, aluminum concentrate with a yield of 85.91% and sulfur content of 0.56% were obtained using a common collector. However, with the addition of the novel NPC, aluminum concentrate with a yield of 85.70% and sulfur content of 0.36% could be obtained by a simpler flowsheet of “one roughing-one cleaning-two scavenging”. The improvement in flotation performance is suggested to be contributed by the addition of spherical NPC, which induced a rougher and more hydrophobic pyrite surface.

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