Abstract
Large number of available resource is in the copper slag, which includes oxides of copper and oxides of iron. The total iron in copper slag is usually above 35%, and iron element in copper slag are mainly distributed in olivine phase and magnetic iron oxide minerals. Because minerals in copper slag embedded with each other and the grain of minerals in copper slag are very small, so it is very difficult to recover iron from the copper slag by means of traditional separation technology. Based on the characteristics of copper slag, iron in copper slag can selectively be gathered to magnetite phase through the melted copper slag is processed, and the size of grain of magnetite grows up by adopting appropriate measure to control the reaction temperature. With magnetic separation technology, the magnetite (Fe3O4) can be gotten which contains more total iron.
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