(昆明理工大學(xué) 冶金與能源工程學(xué)院，昆明 650093)
摘 要: 鋅精礦與鋅浸渣協(xié)同浸出過程中利用Fe3+與鋅精礦發(fā)生氧化還原反應(yīng)，實(shí)現(xiàn)鋅精礦與鋅浸渣的同步溶解，且緩解溶液中高濃度Fe3+對(duì)鋅浸渣溶解的抑制作用。對(duì)渣礦協(xié)同浸出的礦物溶解行為進(jìn)行研究，同時(shí)也以單一礦物鋅精礦為研究對(duì)象，研究了其在H2SO4-Fe2(SO4)3體系中的氧化轉(zhuǎn)化行為。結(jié)果表明：渣礦協(xié)同浸出能有效提高有價(jià)金屬的浸出率，且浸出液中Fe3+含量較低，便于后續(xù)處理；根據(jù)XRD、SEM和XPS分析，鋅精礦在氧化轉(zhuǎn)化過程中不斷溶解，鋅精礦中的硫主要被氧化成單質(zhì)硫進(jìn)入渣中，且單質(zhì)硫在礦物顆粒表面形成包裹，使其溶解不充分。
關(guān)鍵字: 鋅精礦；鋅浸渣；協(xié)同浸出；氧化轉(zhuǎn)化
（Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China）
Abstract:Based on the redox reaction of Fe3+ and zinc concentrate, the method of the simultaneous leaching of zinc concentrate and zinc residue was proposed. The method achieved the dissolution of the zinc concentrate and the zinc residue, and also relieved the inhibitory effect of high concentration Fe3+ on the dissolution of zinc residue. The dissolution behavior of simultaneous leaching was studied, at the same time, taking zinc concentrate as the research object, the oxidative conversion behavior in H2SO4-Fe2(SO4)3 system was also studied. The results show that the simultaneous leaching process can effectively increase the leaching rate of valuable metals, and the content of Fe3+ in the leachate is low, which is convenient for subsequent treatment. According to the XRD, SEM and XPS analyses, zinc concentrate is continuously dissolved during the process of oxidative conversion. The sulphur of zinc concentrate is mainly oxidated into the elemental sulfur entered the residue. The elemental sulfur forms a wrap on the surface of the mineral particles, which results the zinc concentrate cannot fully dissolve.
Key words: zinc concentrate; zinc residue; simultaneous leaching; oxidation conversion
