采用射流分级的方法对细钨粉末进行预处理。该方法可以实现粗大颗粒的有效去除，改善软团聚现象，但是对于部分硬团聚无法彻底消除。在形貌方面，分级钨粉形貌保持良好，未遭到破坏。采用费氏粒度较细的钨粉分级后的粉末，可以帮助降低制品晶粒尺寸，更容易获得高致密制品。

The fine tungsten powder is pretreated by jet classification method. This method can effectively remove coarse particles and improve the soft agglomeration phenomenon, but it cannot completely eliminate some hard agglomerations. In terms of morphology, the morphology of the graded tungsten powder is maintained well without being damaged. Using the classified powder of the tungsten powder with finer Fisher particle size can help reduce the grain size of the product and make it easier to obtain high-density products.