从贫化电炉渣浮选尾砂中氨浸铜的动力学研究  

Research on Leaching Kinetics of Copper From Electro Slag by Ammoniacal Solution

作　　者：于延芬[1] 刘缘缘[2] 秦庆伟[3] 陈湘清[1] 

机构地区：[1]中国铝业股份有限公司郑州研究院,河南郑州450041 [2]武汉科技大学冶金矿产资源高效利用与造块湖北省重点实验室,湖北武汉430081 [3]武汉科技大学钢铁冶金及资源利用教育部重点实验室,湖北武汉430081

出　　处：《湿法冶金》2012年第4期230-233,236,共5页Hydrometallurgy of China

基　　金：中国博士后基金资助项目(20100480885)

摘　　要：研究了采用(NH4)2CO3-NH3·H2O体系从湖北大冶某冶炼厂电炉渣浮选尾砂中浸出铜,考察了炉渣粒度、浸出温度、氨水浓度、固液质量体积比、碳酸铵用量、搅拌速度等因素对铜浸出率的影响。试验获得从电炉渣浮选尾砂中浸出铜的最佳条件为:炉渣粒度0～0.045mm,浸出温度80℃,氨水质量浓度70g/L,固液质量体积比1∶10,碳酸铵用量1.5g,搅拌速度500r/min。浸出过程前、后期受固膜扩散控制,浸出中期受扩散与化学反应共同控制。Leaching of copper from electro slag from Daye Copper smelter in Hubei has been studied in （NH4）2CO3-NH3 ·H2O system. The effects of particle size, reaction temperature,concentration of NH3 · H2O,solid-liquid ratio, usage amount of（NH4）2CO3,mixing speed on leaching rate of copper have been examined. The optimum leaching conditions were determined that the slag particle size was 0～0. 045 mm, leaching temperature was 80 ℃ ,concentration of NH3 ·H2O was 70 g/L, solid-liquid ratio was 1 ： 10, usage amount of （NH4）2CO3 was 1. 5 g and mixing speed was 500 r/min. The leaching process was controlled by solid film diffusion in forepart and post period and by diffusion and chemical reaction in leaching intermediate stage.

关 键 词：电炉渣 (NH4)2CO3-NH3·H2O体系 铜 浸出 动力学 

分 类 号：TF811[冶金工程—有色金属冶金]