Innovative scheme for hemimorphite flotation: Synergistic activation performance and mechanism
Source abstract
Abstract
Hemimorphite exhibits poor floatability during sulfidization flotation. Cu2+and Pb2+addition enhances the reactivity of the hemimorphite surface and subsequently improves its flotation behavior. In this study, the mechanisms of Cu2++ Pb2+adsorption onto a hemimorphite surface were investigated. We examined the interaction mechanism of xanthate with the hemimorphite surface and observed the changes in the mineral surface hydrophobicity after the synergistic activation with Cu2++ Pb2+. Microflotation tests indicated that individual activation with Cu2+or Pb2+increased the flotation recovery of hemimorphite, with Pb2+showing greater effectiveness than Cu2+. Meanwhile, synergistic activation with Cu2++ Pb2+considerably boosted the flotation recovery of hemimorphite. Cu2+and Pb2+were both adsorbed onto the hemimorphite surface, forming an adsorption layer containing Cu or Pb. Following the synergistic activation with Cu2++ Pb2+, the activated layer on the hemimorphite surface consisted of Cu and Pb and a larger amount of the active product compared with the surface activated by Cu2+or Pb2+alone. In addition, xanthate adsorption on the hemimorphite surface increased noticeably after synergistic activation with Cu2++ Pb2+, suggesting a vigorous reaction between xanthate and the activated minerals. Therefore, synergistic activation with Cu2++ Pb2+effectively increased the content of active products on the hemimorphite surface, thereby enhancing mineral surface reactivity, promoting collector adsorption, and improving surface hydrophobicity.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Minerals Flotation and Separation Techniques · Metal Extraction and Bioleaching · Mineral Processing and Grinding
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (32)
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