许多情况下，破碎的矿石颗粒粒度不足以达到分选所需的目的矿物解离的程度。
In many cases the crushed ore particles are not sufficiently small to permit liberation of the desired mineral so that separation can be achieved.
利用气流分选的方法对粉碎后的废弃印刷线路板中的金属与非金属进行了研究，粉碎后的颗粒在气流作用下按照密度与粒度进行分选。
The metal and non-metal of comminuted printed circuit board scrap was studied by the method of pneumatic separation, comminuted material were separated according to density and size by wind power.
结果指出，若要使某一粒度段的物料在充气水力旋流器内得到有效的分选，其离心力强度应处于适中范围。
The research results show that a moderate centrifugal field strength is optimum for the effective separation of particles with a set size fraction in the air-sparged hydrocyclone.
讨论了空气重介流化床分选对入料粒度上下限的控制方法和存在问题，介绍了潮湿原煤空气分级新方法。
The problems in controlling upper size and lower size of feed into an air solid fluidized bed were discussed, and then an air classification technology of moist raw coal was introduced.
结果显示，长江下游悬移载荷的粒度组成以粉砂、粘土为主，几乎不含砂，分选较差，泥沙来源比较复杂。
The results show that the suspended sediments of the Changjiang River are mainly composed of silt and clay, and with almost no sand.
沙丘砂由分选、磨圆好的石英砂组成，含量大于95%，具单众数粒度分布，无悬移质。
The dune sands are very well sorted and rounded pure quartz sand(>95%) with single mode grain distribution and without suspension materials.
沙丘砂由分选、磨圆好的石英砂组成，含量大于95%，具单众数粒度分布，无悬移质。
The dune sands are very well sorted and rounded pure quartz sand(>95%) with single mode grain distribution and without suspension materials.
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