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在冶金發展的初期,只是處理含銅在百分之五以上的銅的富氧化矿,但由於這種富鑛的儲量開始逐渐地衰減,因此必須處理較貧的鑛石。貧鑛經過手選後,選出富有銅鑛物的塊鑛,金屬品位低的鑛石則被送到废石場。由于富矿儲量的進一步衰減,因此不得不開始處理具有大量硫和鐵的貧鑛。曾研究出鼓風爐熔煉的工藝過程,含銅在1.5％以下的硫化鑛是適用于這一工藝過程的。铜生產的增加迫使尋求新的處理方法及利用含銅低于10％的貧鑛,因此,研究出泡沫選鑛法或浮游選鑛法。 這種方法是很有利的,因此,現在阿非利加還採用這種方法來處理發新現的天然銅鑛(含銅6％以上)的富鑛床。
In the early stages of metallurgical development, only the oxide-rich ore containing copper in excess of 5% copper was treated, but the poorer ore had to be dealt with as the reserves of this rich ore began to decay gradually. Lean ore after hand selection, the election of copper ore rich in lumps, low grade metal ore was sent to the waste rock field. As a result of the further decay of the rich reserves, it has had to begin to deal with lean mines with large amounts of sulfur and iron. Have studied the blast furnace smelting process, with less than 1.5% copper sulfide ore is suitable for this process. The increase in copper production has forced the search for new treatment methods and use of lean mines containing less than 10% copper, so a foam or floatation process has been developed. This approach is very beneficial, and as a result, Aficelos is now also using this method to deal with the newly-occurring natural copper deposits (more than 6% copper).