(1. 江蘇大學(xué)材料科學(xué)與工程學(xué)院，鎮(zhèn)江 212013；
2. 中南大學(xué)冶金與環(huán)境學(xué)院，長(zhǎng)沙 410083)
摘 要: 采用亞氨基二乙酸鹽體系循環(huán)浸出處理低品位氧化鋅礦，浸出劑溶液經(jīng)浸出-沉鋅-沉鈣處理后可實(shí)現(xiàn)浸出劑再生，再生后的浸出劑溶液按浸出-沉鋅-沉鈣批處理循環(huán)5次，綜合考察各過(guò)程對(duì)再生浸出劑溶液浸鋅效果的影響。結(jié)果表明：沉鋅和沉鈣過(guò)程可分別將溶液體系中與Ida2-配合的大量Zn2+和Ca2+脫除，達(dá)到恢復(fù)配體Ida2-活性的目的，再生后浸出劑溶液的浸鋅效果與新鮮浸出劑溶液的相當(dāng)；在循環(huán)浸出過(guò)程中，鋅的平均浸出率為76.90%，理論可溶性鋅的平均浸出率為93.8%。
關(guān)鍵字: 氧化鋅礦；循環(huán)浸出；亞氨基二乙酸；鋅冶金
（1. School of Material Science and Engineering, Jiangsu University, Zhengjiang 212013, China;
2. School of Metallurgy and Environment, Central South University, Changsha 410083, China）
Abstract:Low grade zinc oxide ores were treated by cycle leaching in Ida2--H2O system (iminodiacetate aqueous solution). The lixiviant solution was regenerated under a batch process containing the following stages of leaching, Zn precipitation and Ca precipitation. The regenerated lixiviant solution was treated by leaching, Zn precipitaling and Ca precipitating five cycles. And the influences of each process on Zn leaching behavior in the regenerated lixiviant solution were investigated at each stage of all the batch cycles. The results show that the main ions Zn2+ and Ca2+ combined with Ida2- are removed efficiently from leaching liquor with the treatment of Zn precipitation and Ca precipitation, respectively. After two stages precipitation, the activity of Ida2- is recovered in the solution. The resulting of zinc-leaching in the regenerated lixiviant solution are reappeared results in the freshly prepared lixiviant solution. The results of the zinc leaching rates for raw ores and theoretical soluble zinc in raw ores are 76.90% and 93.8% on average.
Key words: zinc oxide ore; cycle leaching; iminodiacetic acid; zinc metallurgy
