Effect of Grinding Media on Cyanide Leaching Behavior of Galena

doi:10.12068/j.issn.1005-3026.2022.12.015

Abstract

Abstract: Using zirconia and common cast-iron grinding balls as ball milling media， the effects of grinding media on the variations of pulp and interface properties in the process of galena cyanidation was systematically investigated by chemical and analytical testing techniques. The results show that the use of ceramic ball media can reduce the consumption of NaCN compared to iron bass media， while the generation of SCN^- was reduced and the dissolved oxygen content was significantly higher. The analysis of the surface morphology and element composition of galena by scanning electron microscopy combined with energy dispersive spectroscopy(SEM-EDS)and X-ray photoelectron spectroscopy(XPS)revealed that the iron ball media resulted in more formation of oxygenated flocs of FeOOH and Fe₂(SO₄)₃ on the galena surface. In combination with the contact angle test results， it was found that the surface of galena ground with iron ball media was hydrophilic due to the adhesion of iron filings; and the increased hydrophilicity of galena due to cyanidation was not conducive to subsequent flotation recovery.

Key words: grinding media; surface properties; Galvanic coupling; galena; cyanidation

CLC Number:

TF041

ZHAO Qian-fei， TONG Lin-lin， YANG Hong-ying， JIN Rui-peng. Effect of Grinding Media on Cyanide Leaching Behavior of Galena[J]. Journal of Northeastern University(Natural Science), 2022, 43(12): 1777-1783.

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