Abstract Studying the surface chemical composition of minerals in the Cu-Pb sulfide ore flotation system is helpful to understand the reasons for the difficulty of selective flotation of Cu-Pb sulfide ore. In this work, the surface chemical compositions of Cu and Pb concentrates were investigated by time-of-flight secondary ion mass spectrometry (ToF-SIMS). Considering the complexity of the surface chemical composition of minerals, multivariate curve resolution-alternating least squares (MCR-ALS) and principal component analysis (PCA) were used to interpret and compare ToF-SIMS data. MCR-ALS analysis of the ToF-SIMS imaging dataset identified the dominant distribution areas of mineral phases and flotation reagents. PCA of the spectral datasets of the regions of interest revealed the differences of surface chemical compositions between the minerals in Cu concentrate and those in Pb concentrate. The main finding of this study was that Cu and Pb on the mineral surfaces were responsible for the failure of selective flotation of Cu-Pb sulfide ore.

中文翻译：

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使用 ToF-SIMS 和多变量分析对 Cu-Pb 硫化矿进行表面化学研究

摘要 研究Cu-Pb硫化矿浮选系统矿物表面化学成分，有助于了解Cu-Pb硫化矿选浮困难的原因。在这项工作中，通过飞行时间二次离子质谱法 (ToF-SIMS) 研究了 Cu 和 Pb 精矿的表面化学成分。考虑到矿物表面化学成分的复杂性，采用多元曲线分辨率-交替最小二乘法（MCR-ALS）和主成分分析（PCA）对ToF-SIMS数据进行解释和比较。ToF-SIMS 成像数据集的 MCR-ALS 分析确定了矿物相和浮选试剂的主要分布区域。感兴趣区域光谱数据集的主成分分析揭示了铜精矿和铅精矿中矿物的表面化学成分差异。本研究的主要发现是矿物表面的 Cu 和 Pb 是导致 Cu-Pb 硫化矿选择性浮选失败的原因。