| 摘要 |
<p>The invention is directed to the processing of mineral ores, particularly to the production of metal oxides from metal sulphides, especially antimony sulphides. The process is of the type whereby the ore is first leached by a suitable lixiviant and the thus-leached material is susbsequently subjected to hydrolysis, the improvement comprising first separating the leached material from the lixiviant before the hydrolysis is undertaken. This separation is preferably achieved by crystallization. This improved process requires the use of less noxious and relatively inexpensive reagents, reaction conditions are less extreme, it is possible to recycle a significant quantity of reagents/solvents, a more reactive intermediate product is achieved, the final product is of a high quality and the secondary products are also of commercial value.</p> |
