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从细粒浸染的铅锌矿石中浮选回收方铅矿和闪锌矿时，通常需要再磨，以便在合适的精矿品位时取得更大的回收率，再磨的目的是使有用矿物的粗颗粒粉碎到更容易浮选的粒度，或使有用矿物的连生体解离，以使这些连生体中的脉石不会降低精矿品位。除了改变颗粒粒度和解离度外，再磨还会改变矿物的表面特性，进而改变给定粒度和解高度的矿物颗粒的浮选选率。研究了一种再磨后在粒度和解高度的变化与浮选速率的变化之间按影响程度确定回收率变化的方法。再磨前后矿物的浮选试验，在实验室浮选机中用选厂矿浆进行。从几个铅锌选厂的试验结果可以看出，浮选性能的变化可以归纳为三种类型。因此，这种方法可以将现有选厂的优化集中在磨矿成浮选，也能帮助实验室中设计新的再磨流程。
Flotation recovery of galena and sphalerite from flotated lead-zinc ores usually requires resharpening to achieve greater recovery at the appropriate concentrate grade, with the aim of regrinding to useful mineral The coarse particles are comminuted to a particle size that is easier to flotation or to dissociate the merozoites of useful minerals so that the gangue in these commissures does not degrade the concentrate grade. In addition to changing the particle size and the degree of dissociation, reground changes the surface properties of the mineral, which in turn changes the flotation selectivity of the mineral particles for a given particle size and height. A method was developed to determine the change of recovery depending on the degree of influence between the changes in particle size and solution height and the flotation rate after reground. Before and after grinding mineral flotation test, in the laboratory flotation machine with pulp factory election. From several lead-zinc plant test results can be seen, the changes in flotation performance can be grouped into three types. As a result, this method can concentrate the optimization of existing mills on grinding into flotation and also help to design new regrinding processes in the laboratory.