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美国矿业局的这份报告研究了两个从平罐蒸馏炉渣的磁性部分中回收锌、铜、银和铁的方法。进行了产出高铜生铁的还原熔炼和产出铜-银-铁冰铜及生铁的冰铜熔炼的小规模试验。在两种情况下锌都烟化成氧化物而予以回收。直接还原熔炼产出含铜高的金属铁和基于渣中含硫而生成的少量富冰铜。第二法的产品是一种含有几乎全部银,80％的铜和37％的铁的冰铜,和一种含有所有其余的铜的铁-铜合金。从熔融了的高铜铁中可以用金属铅或硫酸钠提出差不多全部的铜并获得了合格的铸造生铁。
This report from the U.S. Bureau of Mines investigates two methods for recovering zinc, copper, silver and iron from the magnetic portion of a canister retort. A small-scale trial was conducted on the reduction smelting of high-copper pig iron output and the smelting of copper-silver-iron matte and pig iron production. In both cases, zinc is smoked into oxides and recovered. Direct reduction smelting produces high copper-containing metallic iron and a small amount of ice-rich copper based on sulfur contained in the slag. The second method product is a matte containing almost all of silver, 80% of copper and 37% of iron, and an iron-copper alloy containing all the rest of the copper. From molten high-copper iron, almost all of the copper can be made from metallic lead or sodium sulfate and qualified cast iron can be obtained.