(1. 北京科技大學 金屬礦山高效開采與安全教育部重點實驗室，北京 100083；
2. 山西中條山工程設計有限公司，運城 043700；
3. 河南省地礦局第三地質礦產調查院，信陽 464000)
摘 要: 采用碘化浸出工藝在室溫條件下對浮選金精礦和某難浸含銅氧化金礦分別進行浸出實驗，考察磨礦細度、碘初始濃度、碘與碘離子質量比(m(I2):m(I-))、浸出液pH值和液固比5種因素對兩種礦樣浸出效果的影響，并結合碘化浸出機理對實驗結果進行分析。結果表明：當攪拌速度為400 r/min、溫度為25 ℃、單質碘初始濃度為8 g/L、碘單質與碘離子質量比為1:6、浸出液pH為7.5和液固比為4:1(mL/g)時，金精礦中粒徑小于74 μm 的含量占99.2%，浸出4 h時，金的浸出率達到88.1%；含銅氧化金礦中其粒徑小于74 μm的含量占91.6%，浸出2 h時，金的浸出率達到88.2%。
關鍵字: 碘化浸金；金精礦；難浸含銅氧化金礦；碘；碘化物；浸出率
（1. Key Laboratory for High-efficient Mining and Safety of Metal Mines, Ministry of Education,
University of Science and Technology Beijing, Beijing 100083, China;
2. Shanxi Zhongtiaoshan Engineering Design and Research Co., Ltd., Yuncheng 043700, China;
3. Institute of Geological and Mineral Resources Survey of Henan, Xinyang 464000, China）
Abstract:The gold concentrate and copper-bearing refractory oxidized gold were subjected to iodide/iodine leaching process, respectively, at room temperature. The influences of five factors on the leaching results of the two ore samples were investigated, which include the grinding fineness, I2 initial concentration, I2-I- mass ratio (m(I2):m(I-)), pH value and the liquid-to-solid ratio. And the experimental results were discussed combined with the iodization mechanism analysis. The results indicate that the gold leaching rates of the gold concentrate reaches 88.1% under the conditions of the gold concentrate ground product with size of less than 74 μm accounting for 99.2% and the leaching time of 4 h; whereas the gold leaching rate of the refractory gold ore under conditions of the refractory gold ore with size of less than 74 μm accounting for 91.6% and leaching time of 2 h, reaches 88.2%. Moreover, both of them were tested under the conditions as follows: stirring speed 400 r/min, room temperature 25 ℃, I2 initial concentration 8 g/L, I2-I- mass ratio 1:6, pH value 7.5, liquid-to-solid ratio 4:1 (mL/g).
Key words: iodide leaching; gold concentrate; copper-bearing refractory oxide gold; iodine; iodide; leaching rate
