Analyzed the value of copper of recovery in electrolytic zincsmelter, made a conclusion that the copper was a valued element, mean while, described the method of copper recovery.
分析了电锌厂铜回收的价值，指出铜在电锌生产中是有益元素，并阐述了铜回收的措施。
2
After the commercial test, the Northwest Lead ZincSmelter 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。
3
The hydrometallurgy technics of Zinc system in the Northwestern Lead and ZincSmelter uses the purification of reverse adding Antimony salt to get rid of the impurity in the Zinc Sulfate solution.