直到最近，从矿石中提取纯铜的最佳方法是使用一项需要消耗大量电能的工艺，尤其是当矿石中铜含量低的时候。
Until fairly recently, the only way to extract pure copper from ore was by using a process that requires large amounts of electric energy, especially if the proportion of copper in the ore is low.
简述了从铜炉渣中直接提取有价金属的其他方法。
Other methods to directly extract the valuable metal from copper slag are summarized in brief.
目的：通过对不同提取方法菟丝子样品中总黄酮和微量元素铜含量的测定，分析总黄酮与微量元素铜含量之间的相关性。
Objective:To analyze the trace element Cu with the relativity of the total flavonoids in Semen cuscutae, the contents of total flavonoids and trace element Cu were determined.
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