Grinding and flotation processes are often studied independently, despite the well-established grinding influence on flotation performance, which affects not only particle size and thus liberation but also shape and leads to complex changes in pulp chemistry affecting the particle surface properties relevant for selective bubble attachment. Yet, no study jointly investigated these possible causes and many are limited to single mineral flotation. We relate grinding conditions to changes in pulp chemistry and particle surface properties and assess their impact on upgrading. We studied three non-sulfide ores with different feed grades and valuables: scheelite, apatite, and fluorite. These were dry-, wet-, and wet conditioned-ground before flotation in a laboratory mechanical cell. Results were evaluated with bulk- and particle-specific methodologies. The selectivity of the process is higher after dry grinding for the fluorite and apatite ores and irrelevant for the scheelite ore. Variations in flotation kinetics of individual particles associated to their size and shape are not sufficient to explain these results. The higher concentration of Ca²⁺ and Mg²⁺ observed in the pulp after wet grinding, altering particle surface properties, better explains the phenomenon. Additionally, we demonstrate how particle shape impacts are system specific and related to both entrainment and true flotation.

研磨和浮选过程通常是独立研究的，尽管研磨对浮选性能的影响已得到证实，这不仅影响颗粒尺寸，从而影响释放，而且影响形状，并导致矿浆化学成分发生复杂的变化，影响与选择性气泡附着相关的颗粒表面特性。然而，还没有研究联合调查这些可能的原因，并且许多研究仅限于单一矿物浮选。我们将研磨条件与纸浆化学和颗粒表面特性的变化联系起来，并评估它们对升级的影响。我们研究了三种不同进料品位和有价值的非硫化矿石：白钨矿、磷灰石和萤石。这些在实验室机械槽中浮选前经过干磨、湿磨和湿磨。使用特定于体积和颗粒的方法评估结果。该工艺对萤石、磷灰石矿石干磨后选择性较高，对白钨矿矿石不适用。各个颗粒的浮选动力学与其尺寸和形状相关的变化不足以解释这些结果。Ca浓度较高湿磨后在纸浆中观察到的²⁺和 Mg ^{2+改变了颗粒表面性质，更好地解释了这一现象。}此外，我们还演示了颗粒形状的影响如何是特定于系统的以及与夹带和真正浮选相关的。