The results showed that good purification effects can be obtained, in which not only major coarse impurity particles was removed but also shrinkage porosity was effectively abated.
研究表明，该方法可以实现良好的净化效果。不仅过滤了绝大多数粗大夹杂物，而且对减少显微缩孔十分有效。
The impurity content control and the quality control in the carbonization process in the production of coarse tungsten carbide have been studied.
对粗颗粒碳化钨粉制取过程中杂质含量和碳化质量的控制问题进行了探讨。
The system mainly comprises a rectifying tower (1), a water washing tower (13), a coarse distillation tower (26), a methanol tower (35) and an impurity tower (42).
该系统主要包括精馏塔（1）、水洗塔（13）、粗馏塔（26）、甲醇塔（35）和杂质塔（42）；
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