H_2SO_4+NaCl选择性浸出铅阳极泥的研究.pdf

第21卷第3期
矿冶
Vol 21. No. 3
2012年9月
MINING METALLURGY
September 2012
文章编号:1005-7854(2012)03-0030-03
H2SO4+NaCL选择性浸出铅阳极泥的研究
阮书锋尹飞王成彦王军王振文
(北京矿冶研究总院,北京100160
摘要:采用选择性脱铜一H2SO+NaCl选择性浸锑、铬一硝酸脱铅一火法熔炼回收贵金属工艺综合
回收铅阳极泥中的有价金属。重点介绍了该工艺中H2S04+NaCl选择性浸锑、鉍试验研究。确定了最
佳浸出条件:初始硫酸浓度2.5-3mol/L,NaCl浓度为75~100g/L,浸出温度80℃,液固比I/S=8/1
(mL/g),浸出时间2h;在该条件下锑、铋、铜的平均浸出率均大于99%,铅的平均浸出率仅1.68%,金
银不被浸出,锑、懿、铜得以有效选择性浸出,铅、金、银在渣中得到了有效富集,为后续工艺中硝酸脱铅
和贵金属火法综合回收工艺创造了有利条件,解决了传统铅阳极泥湿法综合回收出现的金属分离不彻
底,贵金属直收率不高等问题
关键词:阳极泥;铅阳极泥;选择性浸出;综合回收
中图分类号:TF812;TH803,2文献标识码:Adoi:10.3969/ i. issn..1005-7854.2012,03.009
STUDY ON SELECTIVE LEACHING FROM LEAD ANODE SLIME
BY H,SO, +Nac
RUAN Shu-feng YIN Fei WANG Cheng-yan WANG Jun WANG Zhen-wen
Beijing General Research Institute of Mining and Metallurgy, Beijing 100160, China
ABSTRACT: The process of Cu selective removal -selective leaching S, Bi by H2 S0,+ Nacl- Pb removal by
nitric acid - precious metal recover by smelting method is used to comprehensively recover valuable metals from lead
anode slime. In this paper, the experimental study on selective leaching Sb, Bi by H,S0,+ Nacl is focused. The
best leaching conditions are determined: initial acid ty of H S 2.5-3(ml/), Naci concentration 5-100(/
) leaching temperature 80 C, liquid-solid ratio L/=8/1(m[/g), leaching time is 2 hours, under this condi-
tion, the average leaching rate of Sb, Bi and Cu are all over 99%, the average leaching rate of Pb is only 1.68%
Au and Ag are not be leaching; So b, Bi and Cu are effectively selectively leached, P, Au and Ag are effectively en-
riched in leaching slag, which creates favorable conditions for subsequent comprehensively reeovery process of Pb
moved by nitric acid and precious metals recovered by pyrometallurgy method, which solves the problems occurring
during the traditional process such as metal incompletely separated and low precious metals direct recovery.
KEY WORDS: anode slime;lead anode slime; selective removal; comprehensive recovery
铅阳极泥在粗铅电解精炼过程中的产率为粗铅统湿法工艺一般采用氯化浸出或混酸浸出等方法将
的1.2%-1.8%12),其中主要含有Au,A8,Sb,Bi,铅阳极泥中Sb,Bi,Cu等贱金属全部浸入溶液中,然
Cu,Pb等金属元素。关于铅阳极泥的综合回收,传后采用置换、水解、中和沉淀等方法将各金属进行分
离。然而传统湿法工艺存在金属浸出选择性差,贵
收稿日期:2012-0209
金属直收率低,金属间分离不彻底,产品质量不高等
基金项目:国家高技术研究发展(863)计划资助项目缺点4。在此提出选择性脱Cu-H2SO,+NaCl选
(2009AA064602)
作者简介;阮书锋,硕士,从事有色治金研究与设计工作。
择性浸Sb,Bi一硝酸脱Pb一火法熔炼回收贵金属