| 摘要 |
<p>The invention relates to a method wherein the zinc concentrate is subjected to the following steps: a. roasting at least one part of the zinc concentrate; b. neutral leaching, wherein the zinc oxide is dissolved; c. acid leaching, wherein the zinc ferrites are leached; d. reducing the Fe+++ contained in the Fe++ solution by adding zinc concentrate; e. neutralizing the acidity of the solution with calcine; h. oxidizing iron and precipitating jarosite, free of contaminating solids, by injecting oxygen or oxygen-enriched air and adding an alkali or an alkaline salt. Additionally, after the neutralizing step (e), there can be a releaching step (f) with the residue for precipitating arsenic and similar impurities, and a cementation of Cu step (g), and after step (c), a step (i) of reducing iron and of direct leaching.</p> |
