Mo-Cu复合材料的电化学分离及钼酸钠制备  

Electrochemical Separation of Mo-Cu Composites and Preparation of Sodium Molybdate

作　　者：王涵睿 廖磊 张伟哲 史智峰 郑学军 WANG Hanrui;LIAO Lei;ZHANG Weizhe;SHI Zhifeng;ZHENG Xuejun(Western Metal Materials Co.,Ltd.,Xi′an 710299,Shaanxi,China)

机构地区：[1]西部金属材料股份有限公司,陕西西安710299

出　　处：《中国钼业》2024年第4期43-47,共5页China Molybdenum Industry

摘　　要：针对钼铜复合材料中钼铜的分离回收,提出了一种电化学溶解分离的方法,并制备得到高纯度的二水合钼酸钠。系统研究了工艺参数对整个钼铜复合材料电溶解过程的影响和二水合钼酸钠的制备与纯化。研究结果表明:阴极电流密度450 A/m^(2)、极间距2 cm、NaOH初始浓度60 g/L时钼电溶解效果最好,7 d溶解率约90%。超声对钼电溶解无明显促进作用,但是能加速阳极原料中铜粉的脱落。电解母液通过蒸发结晶,并对晶体采用无水乙醇洗涤和重结晶的纯化工艺,可最终获得纯度达98.8%的二水合钼酸钠结晶,每公斤原料生产二水合钼酸钠约1.6 kg,满足工业标准。对比直接售卖钼铜复合废料,电化学回收废料毛利润约增加12.3万元/t。A method of electrochemical dissolution separation of Mo-Cu composite materials was proposed,and sodium molybdate dihydrate with high purity was prepared.The influence of process parameters on the entire electro dissolution process of Mo-Cu composite materials and the purification of ammonium molybdate dihydrate preparation were systematically studied.The research results show that when the cathode current density is 450 A/m^(2),the electrode spacing is 2 cm,and the initial concentration of NaOH is 60 g/L,the molybdenum dissolution effect is the best,with a 7-day dissolution rate of about 90%.Ultrasound has no significant promoting effect on the dissolution of Mo,but it can accelerate the detachment of copper powder in the anode raw material.The electrolysis mother liquor is purified by evaporating crystallization and using anhydrous ethanol washing and recrystallization to obtain sodium molybdate dihydrate crystals with a purity of 98.8%.Approximately 1.6 kg of sodium molybdate dihydrate is produced per kilogram of raw material,which meets industrial standards.Compared to directly selling molybdenum copper composite waste,the gross profit per ton of electrochemical recovery process increases by about 123000 Yuan.

关 键 词：钼铜分离 电化学 二水合钼酸钠 超声 结晶 

分 类 号：TQ031[化学工程] TQ016TQ621