摘要
采用电化学溶解法对含Co、Cu、Fe等杂质的废镍合金在硫酸中的溶解过程进行了研究。采用EDTA络合滴定法分析和原子吸收分光光度法测定了溶液中镍及杂质金属离子的含量。研究了电流密度、硫酸浓度、电解液温度、电解时间及电解方式等对电化学溶解的影响。得到废镍合金电化学溶解的优化工艺条件为阳极电流密度200A m2、硫酸浓度1.25mol L、温度40℃,采用方波脉冲电流电解。稳定电化学溶解时的主要技术指标为槽电压0.8～1.0V,电流效率90.8%,每吨镍直流单耗为800～1015kW·h。
An investigation is made of the dissolution process of Co, Cu and Fe containing nickel alloy scraps in sulphuric acid solution by using electrochemical dissolution method. The content of nickel and impurity metals is analysed by EDTA titration and determined by atomic obsorption spectrophotometry. The effects of current density, H2SO4 concentration and electrolyzing time, temperature and patterns on electrochemical dissolution are investigated. The optimum conditions suitable for electrochemical dissolution of nickel alloy scraps are obtained as follows： current density of 200 A/m^2, H2SO4 concentration of 1.25 mol/L, operating temperature of 40℃ and pulse current pattern. Main technical indexes are as follows： cell voltage, 0.8-1.0 V, averagee current efficiency, 90.8%, and specific energy consumption, 800-1015 kW·h per ton of nickel.
出处
《矿冶工程》
CAS
CSCD
北大核心
2005年第4期42-45,共4页
Mining and Metallurgical Engineering
基金
国家自然科学基金项目(50302016)
中国博士后基金资助项目
关键词
电化学溶解
镍
槽电压
电流效率
electrochemical dissolution
nickel
cell voltage
current efficiency
