(1. 北京科技大學(xué) 金屬礦山高效開(kāi)采與安全教育部重點(diǎn)實(shí)驗(yàn)室，北京 100083；
2. 北京科技大學(xué) 土木與環(huán)境工程學(xué)院，北京 100083；
3. 山西中條山工程設(shè)計(jì)有限公司，運(yùn)城 043700)
摘 要: 采用碘-碘化物體系對(duì)金精礦進(jìn)行浸出，通過(guò)實(shí)際礦石的浸出試驗(yàn)考察攪拌速度、浸出溫度、碘濃度及碘離子濃度對(duì)金精礦碘化浸出反應(yīng)動(dòng)力學(xué)的影響。結(jié)果表明：提高攪拌速度對(duì)金的浸出有不利影響；通過(guò)對(duì)影響該體系動(dòng)力學(xué)參數(shù)的考察，發(fā)現(xiàn)其符合核收縮模型，反應(yīng)過(guò)程總體由界面化學(xué)反應(yīng)控制，其表觀活化能為31.674 kJ/mol，碘濃度和碘離子濃度的反應(yīng)級(jí)數(shù)分別為1和0.5，建立了金精礦碘化浸出過(guò)程的反應(yīng)速率方程。
關(guān)鍵字: 金精礦；碘化浸出；動(dòng)力學(xué)；表觀活化能；界面化學(xué)反應(yīng)
（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. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;
3. Shanxi Zhongtiaoshan Engineering Design & Research Co., Ltd., Yuncheng 043700, China）
Abstract:Gold concentrate was leached by iodine-iodide solution system. The effects of different parameters such as stirring speed, leaching temperature, iodine concentration and iodide concentration on the gold leaching dynamics were investigated. The results show that increasing stirring speed has a negative influence on the gold leaching. Through the study of dynamic parameters of this system, it is found that gold concentrates leaching by iodine-iodide solution is in accordance with the shrinking core model. The overall reaction is controlled by the interfacial chemical reaction with the apparent activation energy of 31.674 kJ/mol. The reaction orders of iodine and iodide concentrations are 1 and 0.5, respectively. The leaching reaction velocity equation of the process is established.
Key words: gold concentrates; iodine leaching; dynamics; apparent activity energy; interfacial chemical reaction
