(1. 南昌航空大學(xué) 環(huán)境與化學(xué)工程學(xué)院， 南昌 330063；
2. 昆明理工大學(xué) 材料與冶金工程學(xué)院，昆明 650093)
摘 要: 采用高濃度鈷離子的硫酸鋅溶液, 研究鋅粉置換除鈷機(jī)理。對(duì)置換后的凈化渣進(jìn)行SEM和EPMA分析。研究結(jié)果表明，溫度不同時(shí)，表面沉積物的結(jié)構(gòu)也不同，表面沉積物的結(jié)構(gòu)影響置換的速度。通過(guò)對(duì)產(chǎn)物結(jié)構(gòu)的研究，可推測(cè)出鋅粉置換除鈷過(guò)程的機(jī)理。首先鋅粉和鈷離子結(jié)合形成一種鈷−鋅合金，這一反應(yīng)可以比較快速達(dá)到平衡，然后合金繼續(xù)和鈷離子反應(yīng)得到鈷單質(zhì)，這個(gè)過(guò)程是整個(gè)反應(yīng)的控制步驟。
關(guān)鍵字: 硫酸鋅溶液；除鈷；機(jī)理
zinc sulphate solution with zinc powder
（1. School of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China;
2. Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology,
Kunming 650093, China）
Abstract:Zinc sulfate solution with high cobalt concentration was used to study the mechanism of cobalt removal. Residues after the cementation process from zinc sulfate solution were analyzed by SEM and electron probe micro-analysis (EPMA). With the increase of temperature, cobalt removal can be improved considerably. The mechanism of cobalt removal by zinc powder is thought as follows. Firstly, the cobalt ion forms Co-Zn alloy with zinc particles, and the reaction reaches equilibrium quickly; secondly, the Co-Zn alloy continues reacting to Co with Co2+, which is the control procedure of the whole reaction.
Key words: zinc sulphate solution; cobalt removal; mechanism
