本研究所用原料为两种还原钨粉，其费氏粒度分别为3.1～3.2μm、3.0～3.5μm。经烘箱充分干燥后，采用射流分级技术对其进行预处理，然后利用该原料，等静压成型并在氢气气氛下经烧结制得钨坩锅。经射流分级预处理后，费氏粒度为3.0～3.5μm的原料粉末制备得到的钨坩埚密度由18.247 g/cm³提高到18.770 g/cm³。同时，维氏硬度由HV_0.3 309.09提高到HV0.3 372.15。同时，费氏粒度为3.1～3.2 μm的原料粉末，其密度由18.145 g/cm³提高到18.637 g/cm3，维氏硬度由315.92变为HV0.3 347.18。原钨粉经射流分级预处理后，钨制品的物理性能得到显著改善。

The raw materials used in this study are two kinds of reduced tungsten powders, the Fisher particle size of which is 3.1～3.2μm and 3.0～3.5μm respectively. After being fully dried in an oven, it is pretreated by jet classification technology, and then the raw material is used to form a tungsten crucible by isostatic pressing and sintering in a hydrogen atmosphere. After pretreatment by jet grading, the density of the tungsten crucible prepared from raw material powder with a Fischer particle size of 3.0～3.5μm increased from 18.247 g/cm3 to 18.770 g/cm3. At the same time, the Vickers hardness increased from HV0.3 309.09 to HV0.3 372.15. At the same time, the density of raw material powder with a Fischer particle size of 3.1-3.2 μm increased from 18.145 g/cm3 to 18.637 g/cm3, and the Vickers hardness changed from 315.92 to HV0.3 347.18. After the raw tungsten powder is pretreated by jet grading, the physical properties of tungsten products have been significantly improved.