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火法熔炼金精矿或处理铜、铅阳极泥所得的粗金,含有Ag、Cu、Ni、Pb和少量铂族元素、杂质总量有时高达10%以上,这种粗金必须进一步提纯,才能获得合乎标准的纯金产品。金的提纯大都采用电解精炼的方法,它具有许多优点:产品纯度高;金属损失少;操作简便,不产生有害烟气;并可附带回收铂、钯等稀贵金属。因此,电解精炼(?)被广泛地应用。
Crude gold obtained from pyrometallurgy or from copper and lead anode slimes, containing Ag, Cu, Ni, Pb and a small amount of platinum group elements, may sometimes total up to 10% or more of the total impurities. This crude gold must be further purified Get standard gold products. Purification of gold mostly electrolytic refining method, which has many advantages: high product purity; less metal loss; easy to operate, does not produce harmful fumes; and can be attached to the recovery of platinum, palladium and other rare metals. Therefore, electrolytic refining (?) Is widely used.