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中南大学学报(自然科学版)

Journal of Central South University

第43卷    第7期    总第215期    2012年7月

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文章编号:1672-7207(2012)07-2489-06
含银铅锑多元合金真空蒸馏的元素挥发行为
李亮1, 2,刘大春1, 2, 3,杨斌1, 2,徐宝强1, 3,戴永年1, 2, 3,周厚军1, 2

(1. 昆明理工大学 真空冶金国家工程实验室, 云南 昆明,650093;
2. 昆明理工大学 云南省有色金属真空冶金重点实验室, 云南 昆明,650093;
3. 云南省复杂有色金属资源清洁利用国家重点实验室(培育基地),云南 昆明,650093
)

摘 要: 以富集银为目的,采用真空蒸馏法研究含银铅锑多元合金在中真空(5~25 Pa)的条件下蒸馏过程中各元素的挥发行为,考察蒸馏温度、蒸馏时间对各元素脱除率的影响。实验结果表明:在系统压力为5~25 Pa,蒸馏温度为950 ℃,蒸馏时间≥45 min的条件下,Pb和Bi脱除率接近100%;As和Sb的挥发较为彻底,其脱除率分别达到96.3%和92.5%以上,而Ag和Cu基本不挥发。残留物的XRD分析结果表明,残留物中Cu与Sb形成化合物Cu2Sb及Cu10Sb3, Ag与Sb生成Ag3Sb, As与Cu生成Cu5As2, 使得Sb和As的挥发不够彻底。真空蒸馏法提供一种含银铅锑多元合金中Ag与贱金属分离的方法,使Ag能得到有效富集。

 

关键字: 脆硫铅锑矿;铅阳极泥;真空蒸馏;分离;富集银

Volatilization behavior of metals from silver-contained lead-antimony multi-component alloys by vacuum distillation
LI Liang1, 3, LIU Da-chun1, 2, 3, YANG Bin1, 3, XU Bao-qiang1, 3, DAI Yong-nian1, 2, 3, ZHOU Hou-jun1, 2

1. National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology,
Kunming 650093, China;
2. Key Laboratory of Vacuum Metallurgy for Non-ferrous Metal of Yunnan Province,
Kunming University of Science and Technology, Kunming 650093, China;
3. State Key Laboratory Breeding Base of Complex Non-ferrous Metal Resources Clear Utilization in Yunnan Province, Kunming 650093, China

Abstract:The volatilization behavior of metals from silver-contained lead-antimony multi-component alloys was investigated by vacuum distillation process for the enrichment of silver under the condition of medium vacuum. The effects of distillation temperature, distillation time on metals’ removal rate were examined. Experimental results demonstrate that the removal rate of Bi and Pb is close to 100% at 950 ℃ for more than 45 min when the system pressure is 5 to 25 Pa, and more than 96.3% As and 92.5% Sb are volatilized although the results are not very ideal. Ag and Cu are basically non-volatile under the same conditions. XRD analysis indicates that the residual copper, antimony, silver and arsenic are present in phases of Cu2Sb, Cu10Sb3, Ag3Sb and Cu5As2. This is the reason why antimony and arsenic can not be volatilized thoroughly. The vacuum distillation process provides a simple, clean and efficient way for the separation of silver and other metals which compose the lead anode slime with high antimony and low silver. And the silver enrichment is efficient by vacuum distillation.

 

Key words: jamesonite; lead anode slime; vacuum distillation; separation; silver enrichment

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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