铜冶炼副产品粗硫酸镍提纯实验研究  

Experimental Study on Purification of Crude Nickel Sulfate,a by-Product of Copper Smelting

作　　者：侯伟 蒋文豪 游威 陈杭 曾国庆 HOU Wei;JIANG Wenhao;YOU Wei;CHEN Hang;ZENG Guoqing(Fujian Key Laboratory of Copper Green Production and Associated Resources Comprehensive Utilization,Zijin Copper Co.,Ltd.,Shanghang 364200,China)

机构地区：[1]紫金铜业有限公司、福建省铜绿色生产及伴生资源综合利用重点实验室,福建上杭364200

出　　处：《绿色矿冶》2024年第4期32-38,共7页Sustainable Mining and Metallurgy

摘　　要：通过采用“焙烧脱氨-溶解造液-氧化除铁-P204萃取除杂-蒸发结晶”工艺对铜电解副产品粗硫酸镍进行精制提纯。实验结果表明,经过40 min焙烧脱氨后,粗硫酸镍中几乎不存在铵根离子,以H_(2)O_(2)为氧化剂,Ni(OH)_(2)为中和剂,在反应时间为60 min,反应温度60~70℃,不调整酸度的条件下,铁、砷的脱除率分别为98.8%、94.3%;以P204为萃取剂,镍的萃取率仅为0.72%,杂质钙、铜、铁、锰、锌的萃取率都大于99%,萃余液中钙、铜、铁、锰、锌的浓度都低于10 mg/L;最终通过蒸发结晶得到的硫酸镍的主品位大于22%,达到行标HG/T 2824—2022的精制硫酸镍产品要求。In this paper,nickel sulfate,a by-product of copper electrolysis,was refined and purified by the process of“roasting deamination-dissolution liquid-oxidation iron removal-P204 extraction impurity removal-evaporation crystallization”.The experimental results show that after 40 min calcination and deamination,there is almost no ammonium ion in the crude nickel sulfate;using H_(2)O_(2)as oxidant and Ni(OH)_(2) as neutralizer,under the conditions of reaction time 60 min,reaction temperature 60-70℃and no adjustment of acidity,the removal rates of iron and arsenic were 98.8%and 94.3%,respectively.Using P204 as extractant,the extraction rate of nickel is only 0.72%,the extraction rates of calcium,copper,iron,manganese and zinc impurities are all greater than 99%,and the concentrations of calcium,copper,iron,manganese and zinc in the raffinate are all less than 10 mg/L;finally,the main grade of nickel sulfate obtained by evaporation crystallization is more than 22%,which meets the requirements of refined nickel sulfate products of HG/T 2824—2022.

关 键 词：硫酸镍 焙烧 氧化 萃取 除杂 

分 类 号：TF811[冶金工程—有色金属冶金]