(中南工業(yè)大學(xué)有色冶金系， 長沙牋?10083)
摘 要: 介紹了硫酸銨-氨絡(luò)合浸出法直接由礦物原料制取等級氧化鋅新工藝。該工藝采用硫酸銨-氨混合浸出體系， 浸出液經(jīng)凈化后利用蒸氨及復(fù)鹽沉淀的方法沉鋅及回收浸劑， 得到的堿式碳酸鋅經(jīng)鍛燒制得等級氧化鋅。試驗結(jié)果表明硫銨法能處理多種氧化鋅礦、 鋅煙塵及鋅焙砂， 對于成分復(fù)雜，品位低(Zn＜18%)的原料 能制得等級氧化鋅(ZnO≥99.5%)。 硫銨法回收率主要取決于鋅浸出率，因為從浸液到氧化 鋅產(chǎn)品，鋅回收率達98.93%，硫銨法特別適合礦山就地處理廢棄的低度氧化鋅礦。
關(guān)鍵字: 鋅 氧化鋅 氨化
（Department of Non-ferrous Metallurgy,Central Sounth University of Technology, Changsha 410083, P. R. China）
Abstract:Direct preparation of grade zinc oxide from zinc oxide ores or zinc bearing materials by using ammonium sulfate and ammonia leaching process has been described. Recovering zinc from purified solution and recycling leach reagent were achieved by the combination of ammonia evaparation and complex salt precipitation processes. High grade zinc oxide was produced by calcining basic zinc carbonate precipitation. Experimental results showed that this technological process is suitable for treating complex zinc materials including zinc oxide ores and various zinc oxide dusts to produce high grade zinc oxide product(ZnO>99.5%), zinc recovery ratio is determined mainly by zinc leaching ratio, this new technological process is profitable for treating discarded low grade zinc oxide ores in mines.
Key words: zinc zinc oxide ammonium sulfate ammonia leaching process
