After the commercial test, the Northwest Lead Zinc Smelter took the finecadmium to the thick cadmium vacuum distillation system to accumulate the certain production practice experience.
经过工业试验，西北铅锌厂对粗镉真空蒸馏制取精镉积累了一定的生产实践经验。
2
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。
3
The test results show that it is technically feasible to separate silver from crude bismuth by vacuum distillation instead of traditional Parke's process of desilverization(zinc desilverization).