| 摘要 |
<p>A process for converting, into an easily removable form, the impurities, such as arsenic, antimony and bismuth, present in substantially sulfidic complex and/or mixed ores and concentrates or technical precipitates containing similar minerals, wherein the minerals present in the raw material are decomposed and rearranged at a temperature of approx. 500-900.degree.C, preferably 600-800.degree.C, and under a high partial pressure of elemental sulfur, whereby the new compounds produced by the rearrangement of the impurities are optionally evaporated at least partially, at the same stage.</p> |
