Abstract Wet processing after crushing is common practice in mineral processing circuits involving flotation but the need for more efficient water management has increased interest towards dry processing. In this study the effects of both wet and dry grinding on flotation of one sulphidic and one non-sulphidic ore were compared. Bench scale flotation tests were carried out and various microscopic and spectroscopic methods such as FESEM and XPS were used in characterization of flotation feeds and products. Bulk surface charge properties were tested with mass titration. Clear differences in surface properties and flotation results were observed from the wet and dry grinding methods, which encourages further research. Wet grinding was beneficial for the energy efficiency for both ores and promoted the selectivity of flotation particularly with sulphidic ore. The wear of the mill and grinding media seemed more extensive in wet grinding. Dry grinding produced more fine particles tightly attached to the surfaces, caused by the higher surface charge of the dry ground ore especially with non-sulphidic ore.

中文翻译：

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湿磨和干磨后浮选饲料和产品的矿物学和表面化学表征

摘要 破碎后湿法加工是涉及浮选的矿物加工回路中的常见做法，但对更有效的水管理的需求增加了对干法加工的兴趣。在这项研究中，比较了湿磨和干磨对一种硫化矿和一种非硫化矿浮选的影响。进行了实验室规模的浮选试验，并使用了各种显微和光谱方法（如 FESEM 和 XPS）来表征浮选进料和产品。本体表面电荷特性通过质量滴定进行测试。从湿磨和干磨方法中观察到表面性质和浮选结果的明显差异，这鼓励了进一步的研究。湿磨有利于两种矿石的能源效率，并提高了浮选的选择性，特别是对硫化矿。在湿磨中，磨机和研磨介质的磨损似乎更广泛。干磨会产生更多的细颗粒，紧密附着在表面上，这是由于干磨矿石的表面电荷较高，尤其是非硫化矿石。