procedure for the conversion of fororeningar as arsenic, antimony, selenium, tellurium and bismuth

摘要

Procedure to convert to an easily removable form, impurities such as arsenic, antimony and bismuth, present in minerals, concentrates or technical precipitates, basically sulfidic, complex and/or mixed, which contain similar minerals, characterized in that the minerals present in the raw material are decompose and rearrange at a temperature of approximately 500-900º c, preferably of 600-800º c, and under a high partial pressure of sulfur in the elemental state, whereby the new compounds produced by the reorganization of the impurities evaporate, at least partially, in the same phase. (Machine-translation by Google Translate, not legally binding)