目前制备99.999%以上金属高纯钴的制备方法很多，主要制备工艺有萃取法，膜分离法，离子交换法，电解法，区域熔炼法等方法。

There were many methods for preparing cobalt metal of 99.999% purity, such as extraction, membrane separation, ion exchange, electrolysis, zone melting etc.

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电积到钢棉上的金银泥用化学方法进行分离，金泥经熔炼后得合质金，银泥熔炼后可得98%的银锭。

It is split that electricity amasses the golden silver mud on steel cotton to use chemical method. The gold mud is smelted become alloy. after smelting, silver mud can get the silver ingot of 98%.

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