The three main methods for high purity zinc preparation, including electrolytic method, vacuum distillation, zone refining, are summarized and compared in this paper.
本文对目前高纯锌的三种主要制备方法(电解法、真空蒸馏法、区域熔炼法)进行了综述和比较。
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Then the zone refine is also discussed, and shows that zone refine can produce higher purity antimony on the basis of vacuum distillation.
According to geologic characteristics, the vacuum preloading with prefabricated vertical drain (PVD) method was adopted to treat the soft soil in the intertidal zone.