摘要
含铜污泥含有铜、锌、镍、锡、铅等多种有价金属,为了回收其中的有价金属,本研究提出了“碳热还原焙烧−低碳氧化还原精炼”创新工艺。首先通过碳热还原焙烧将锌、锡、铅等有价金属挥发入烟气得以回收,在还原温度为1473 K,碳含量为20%,反应时间为60 min的条件下,铅、锡和锌的脱除率分别达到90.77%、95.14%和99.92%。然后通过低碳氧化还原精炼,在氧化温度为1573 K,加入SiO2量为6%,反应时间为180 min条件下,可得到适用于建筑材料的水淬渣,最后在还原温度为1473 K,碳加入量为8%,反应时间为20 min,将铜、镍富集于阳极铜板中,阳极板中铜含量可达98%以上,符合铜电解的要求。本研究实现有价金属的全回收,较现有的含铜污泥处理工艺,具有流程短,能耗低,有价金属回收率高,经济环保等显著优点。
This paper proposes an innovative“carbothermal reduction roasting-low carbon redox refining”process for recovering valuable metals including copper,zinc,nickel,tin and lead from copper-containing sludge.First,valuable metals are volatilized into the flue gas by carbothermal reduction roasting.At a reduction temperature of 1473 K,a carbon content of 20%,and for a reaction time of 60 min,the ratio of Pb,Sn and Zn removal reached 90.77%,95.14%and 99.92%,respectively.At an oxidation temperature of 1573 K,a SiO2 content of 6%and a reaction time of 180 min,a water quenching slag suitable for building materials was obtained by low-carbon oxidation reduction refining.Finally,at a reduction temperature of 1473 K,8%C addition,and a reaction time of 20 min,copper and nickel were enriched on an anode copper plate and the copper content reached more than 98%,meeting the requirements for copper electrolysis.This study realizes the full recovery of valuable metals.Compared with the existing copper-containing sludge treatment process,it has the obvious advantages of short process,low energy consumption,high recovery rate of valuable metals,economy and environmental protection.
作者
龚傲
吴选高
喻小强
曹才放
刘牡丹
陈志强
田磊
徐志峰
刘勇
GONG Ao;WU Xuan-gao;YU Xiao-qiang;CAO Cai-fang;LIU Mu-dan;CHEN Zhi-qiang;TIAN Lei;XU Zhi-feng;LIU Yong(Institute of Green Metallurgy and Process Intensification,Jiangxi University of Science and Technology,Ganzhou 341000,China;Guangdong Institute of Resources Comprehensive Utilization,Guangzhou 510000,China;State Key Laboratory of Rare Metals Separation and Comprehensive Utilization,Guangzhou 510000,China;Henan Yuguang Gold and Lead Group Co.,Ltd.,Jiyuan,454650,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2020年第9期2178-2189,共12页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(51804136,51764016)
中国博士后科学基金资助项目(2019T120625,2019M652276)
江西省博士后科研项目择优资助(2019KY09)
江西省自然科学基金(20181BAB216017)
稀有金属分离与综合利用国家重点实验室开放基金资助项目(GK-201803)
江西省重点研发计划重点项目(20192ACB70017)。
关键词
含铜污泥
碳热还原焙烧
黑铜
低碳氧化还原精炼
水淬渣
阳极铜
copper-containing sludge
carbothermal reduction roasting
black copper
low carbon redox refining
water quenching slag
anode copper
