从红土镍矿湿法废水中回收镁和锰  

Recovery of Mn and Mg from wet wastewater of laterite nickel ore

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作  者:吴文卫 杜云鹏 吴咪娜 李丽娜 张文杰 李俊 左壮 WU Wenwei;DU YunPeng;WU Mina;LI Lina;ZnANG Wenjie;LI Jun;ZUO Zhuang(Yunnan Academy of Eco-Environmental Sciences,Kunming 650032,China;Engineering Technology Research Center of neavy Metal Pollution Control in Yunnan Province,Kunming 655211,China;Institute of ResourceRecycling,Central South University,Changsha 410083,China;GEM Co.Ltd.,Shenzhen 518101,China)

机构地区:[1]云南省生态环境科学研究院,昆明650032 [2]云南省重金属污染控制工程技术研究中心,昆明655211 [3]中南大学资源循环研究院,长沙410083 [4]格林美股份有限公司,深圳518101

出  处:《矿冶》2024年第1期96-102,共7页Mining And Metallurgy

基  金:云南省重大科技项目(2022AG050010)。

摘  要:红土镍矿湿法冶炼工艺被广泛应用于工业生产,伴随产生大量含Mn^(^(2+))、Ca^(2+)、Mg^(2+)等有价金属的废液,选择性回收不仅能提高经济效益,还能降低废液处理的难度。以CO_(2)为碳源,NaOH作pH值调节剂,在NaOH浓度10%、反应时间15min、液相pH=6.6的条件下能选择性回收废液中的锰,制备含Mn41%、Ca2.5%、Mg0.8%的粗级碳酸锰。回收锰后的废液进一步用0.5mol/L碳酸钠溶液调节pH值至10,回收液相中的Mg^(2+)。此回收工艺能提高经济效益,减少湿法冶炼工艺的碳排放量,具有较高的绿色、经济应用前景。Laterite nickel ore hydrometallurgical process is widely used in industrial production,with a large number of valuable metals containing Mn^(2+),Ca^(2+),Mg^(2+)waste llquid.Selective recovery can not only improve economic beneiits,but also reduce the difficulty of waste liquid treatment.Using CO_(2( as carbon source and NaOn as pn regulator,the manganese in waste liquid can be selectively recovered under the conditions of 10%NaOn concentration,15 min reaction time and pn=6.6,and the crude manganese carbonate containing 41%Mn,2.5%Ca and 0.8%Mg can be prepared.After the recovery of manganese,the waste liquid was further adjusted to the pn value of 0.5 mol/L sodium carbonate solution to 10,and Mg^(2+)in the liquid phase was recovered.This recovery process can improve the economic benefit llne,reduce the carbon emission of the wet smelting process,and has a high green and economic application prospert.

关 键 词:红土镍矿 加压浸出 废液 碳酸锰 沉淀 

分 类 号:TF11[冶金工程—冶金物理化学]

 

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