俄罗斯某含银铅锌矿石的浸锌沉银试验

金属矿山 ›› 2016, Vol. 45 ›› Issue (11): 81-84.

俄罗斯某含银铅锌矿石的浸锌沉银试验

张新海，丁冲

中国有色桂林矿产地质研究院有限公司，广西桂林 541004

出版日期:2016-11-15 发布日期:2017-02-15

Experimental Study on Extracting Zinc with Precipitating Silver from a Russian Silver-lead-zinc Ore

Zhang Xinhai，Ding Chong

China Noferrous Metal Guilin Research Institute of Geology for Mineral Resources，Guilin 541004，China

Online:2016-11-15 Published:2017-02-15

摘要/Abstract

摘要： 俄罗斯某含银铅锌矿石铅、锌、银含量分别为11.52%、28.76%和187.00 g/t，铅主要以硫化铅形式存在，占总铅的92.13%；锌主要以氧化锌形式存在，占总锌的92.35%，浮选工艺难以回收其中的锌。对浮铅前的硫酸浸锌工艺条件进行了研究，并对同时浸出的少量银进行了硫脲法回收试验。结果表明，在硫酸浓度为180 g/L，液固比为5，浸出温度为85 ℃，浸出时间为60 min情况下锌、银、铅的浸出率分别达95.88%、35.51%、4.08%；酸浸液在硫脲用量为理论用量的1.2倍，搅拌反应时间为30 min，沉降时间为6 h情况下沉银，锌的作业损失率为9.02%、银沉淀率为87.23%。试验较好地实现了铅锌分离，且沉银过程中的锌损失量较小。

关键词: 铅锌矿石, 硫酸浸锌, 硫脲沉银

Abstract: In a silver-lead-zinc ore of Russia，lead，zinc and silver content were 11.52%，28.76% and 187.00 g/t respectively.The lead accounted for 92.13% of the total，mainly in the form of lead sulfide；The zinc accounted for 92.35% of the total，mainly in the form of zinc.Zinc is difficult to recover by flotation process.The process of sulfuric acid leaching zinc was studied before lead flotation.Meanwhile the experiment in which a small amount of silver leached was recovered by thiourea has been carried out.The results showed that leaching rate of zinc，silver and lead were respectively 95.88%，35.51%，4.08% under the condition of the sulphuric acid concentration 180 g/L，liquid-solid ratio 5，at the temperature 85 ℃for the extraction time 60 min.If the dosage of thiourea is 1.2 times of the theoretical amount，reaction time is 30 min，the silver settling time is 6 h，in the acid solution ,the loss rate of zinc is 9.02% in theleaching process and the silver deposit rate is 87.23%.In the experiment，the separation of lead and zinc has been achieved，and the loss of zinc is small in the process of silver precipitation.

Key words: Lead zinc ore, Sulfuric acid leaching, Thiourea settling silver

张新海, 丁冲. 俄罗斯某含银铅锌矿石的浸锌沉银试验[J]. 金属矿山, 2016, 45(11): 81-84.

ZHANG Xin-Hai, DING Chong. Experimental Study on Extracting Zinc with Precipitating Silver from a Russian Silver-lead-zinc Ore[J]. Metal Mine, 2016, 45(11): 81-84.

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