低品位铜镍电镀污泥还原硫化熔炼低冰镍  

Production of Low⁃Grade Nickel Matte by Sulphidizing Smelting of Low Grade Copper⁃Nickel⁃Bearing Electroplating Sludge

作　　者：周兆安 刘小文 李俊 毛谙章 李加兴 ZHOU Zhaoan;LIU Xiaowen;LI Jun;MAO Anzhang;LI Jiaxing(Guangdong Feinan Resources Recycling Co Ltd,Zhaoqing 526233,Guangdong,China;Engineering Technology Research Center for Comprehensive Utilization of Industrial Solid Waste of Copper-Containing Sludge Resources of Guangdong,Zhaoqing 526233,Guangdong,China)

机构地区：[1]广东飞南资源利用股份有限公司,广东肇庆526233 [2]广东省工业固废含铜污泥资源综合利用工程技术研究中心,广东肇庆526233

出　　处：《矿冶工程》2023年第6期133-138,共6页Mining and Metallurgical Engineering

摘　　要：通过热力学分析,揭示了铜镍电镀污泥还原硫化熔炼低冰镍过程中主要金属的物相演变规律,分析了还原硫化熔炼过程的主要影响因素。经热力学理论计算可知,电镀污泥铜和镍品位分别为6%和4%时,采用硫石膏作为硫化剂,硫实际用量为理论用量的2.0倍,熔炼气氛P(CO)/[P(CO)+P(CO_(2))]=50%,预期产出低冰镍的品位(Cu+Ni)为57.2%,渣中铜和镍品位均低于0.2%,铜和镍直收率分别可达99.89%和96.59%,固硫率77.20%。铜镍污泥高温硫化熔炼低冰镍工业应用结果表明,与常规湿法回收工艺相比,该工艺金属回收率更高,过程绿色低碳,具有显著的技术优势。A thermodynamic analysis reveals the phase evolution of main metals in the production of low-grade nickel matte by sulfidation smelting of copper-nickel electroplating sludge,and the main influencing factors in the process of sulfidation smelting were analyzed.The thermodynamic calculation shows that with the electroplating sludge grading 6%Cu and 4%Ni,respectively,sulfur gypsum as the sulfurizing agent,the actual addition of sulfur 2.0 times of the theoretical amount,and the smelting atmosphere P(CO)/[P(CO)+P(CO_(2))]=50%,the low-grade nickel matter with the expected grade of 57.2%(Cu+Ni)can be produced,with the grade of copper and nickel in the slag lower than 0.2%.It is shown that the direct recovery rate of copper and nickel can reach 99.89%and 96.59%respectively,and the sulfur fixation rate is 77.20%.An industrial application shows that compared with conventional wet metallurgical recovery process,this technique can bring higher metal recovery rate with a green and low carbon process,thus presenting obvious technical advantages.

关 键 词：危险废物利用 电镀污泥 硫化熔炼 低冰镍 热力学分析 硫化剂 铜镍 

分 类 号：X705[环境科学与工程—环境工程]