| 摘要 |
A process for the selective removal of the impurities, arsenic, antimony, selenium, tellurium and bismuth, present in sulfidic complex or mixed ores and concentrates or industrial precipitates containing similar minerals, by breaking up and rearranging, at an elevated temperature of 600 DEG -900 DEG C. and a high partial pressure of at least 0.2 atm of elemental sulfur, the minerals present in the raw material, in order to cause the formed new impurity compounds to pass into the gas phase, wherein the rearranging is carried out in a gas atmosphere which, in addition to sulfur, contains a sulfur halide in order to halogenate the impurity compounds which have passed into the gas phase, to form stable halides which no longer affect the vaporization equilibrium. |
