铅阳极泥湿法处理工艺实践

铅阳极泥是提取金、银等贵金属的重要原料.控制电位在400~450 mV,使铜、锑和铋等贱金属优先于贵金属氧化浸出,贵金属得到富集.采用亚硫酸钠二次分银、甲醛还原银的工艺,得到品位98.86%的粗银,经银电解精炼,可得到99.99%的纯银.采用常温氯化分金、SO2还原得到粗金、粗金二次溶解以及草酸煮沸还原等工艺,得到纯金粉,金粉质量达到国标Au-1的标准.从铅阳极泥至金粉、粗银粉,金、银的直收率分别为95.65%和98.08%.整个工艺设计简短合理,技术指标较为理想.     

高铋铅阳极泥碱性氧化浸出渣 熔炼-电解提铋研究

以高铋铅阳极泥碱性氧化浸出渣为原料,采用碳热还原熔炼-电解工艺提取铋,同时富集金银.热力学分析表明金属碳热还原的初始温度由低到高依次为:铜、铋、铅、锑、锡;铋氧化物在800 ℃以上可获得足够大的还原热力学推动力.熔炼粗铋合金的最佳温度为800 ℃,碳用量为浸出渣质量的5 %,四硼酸钠用量为浸出渣质量的15 %,熔炼时间为1.5 h.在此条件下,粗铋合金中铋、金、银的平均含量分别为84.29 %,39.62 g/t和6 519 g/t,相比于铅阳极泥原料,金银分别被富集1.8倍.采用公斤级粗铋合金板为阳极,在BiCl₃-NaCl-HCl体系中分别电解24 h、48 h、72 h、112 h,阴极产物中铋平均含量＞98 %,电流效率＞96 %,铋电解阳极泥中金、银平均含量分别为222.94 g/t,34 287.6 g/t,相比铅阳极泥原料,金银平均被富集到9.54倍和10.13倍.      

液氯化法金精炼工艺优化与实践

液氯化法金粉质量受到氯化浸出和还原阶段多种因素的影响。针对中原黄金冶炼厂金粉中杂质银质量分数较高,影响后续金锭的质量,考察了盐酸质量浓度、温度、氧化还原电位等影响因素。通过小型试验及生产实践获得了最佳的工艺条件,即盐酸质量浓度100 g/L,浸出温度85℃～90℃,终点氧化还原电位690～700 mV,还原温度55℃～57℃,还原得到的金粉先后用含氯添加剂的溶液和热水洗涤。在此条件下,可以获得金质量分数大于99. 998%、杂质银质量分数在10×10~(-6)以下的金粉,达到国标1号金的要求。     

金昌冶炼厂阳极泥处理系统存在问题及处理方法探讨

现状与存在的问题Status quo and ex-isting problem s金昌冶炼厂阳极泥处理系统于1991年投入生产,为治理环境污染,从1993年开始对系统进行工艺技术改造:第一步:改盐酸介质氯化分金为硫酸介质氯化分金,取消硝酸分铅工序,消除了硝酸、盐酸两种挥发性强酸对环境造成的严重污染和对设备产生的剧烈腐蚀;第二步:改分金液SO2还原为先经有机相萃取再由草酸铵还原得金粉,经熔铸得产品金,取消金电解工序,消除SO2污染;第三步:改氨水分银、水合肼还原为亚硫酸钠分银、甲醛还原,消除氨气污染。工艺技术改造在治理环境方面收到明显成效,但就整个系统而…     

某铅阳极泥尾矿氯化浸金工艺的研究

某阳极泥原料采用选矿工艺提取贵金属后,金的回收率为81%～82%,尾矿中金的品位在0. 2%～0. 3%之间。由于尾矿中金含量仍然较高,研究新的提金工艺显得极为重要。为了高效回收尾矿中的金,采用氯酸钠-氯化钠溶液体系浸出尾矿,并对浸金工艺进行了系统优化。实验表明,当矿浆浓度为25%、氯酸钠的用量为16 g/L、氯化钠的用量为1. 0 mol/L、硫酸的用量为3 mol/L、浸出温度为80℃、浸出时间为2 h,氯化浸金效果最好,金的最佳浸出率为99. 16%。通过氯化浸金工艺,实现了尾矿中金的高效回收,并且浸出液可直接通过还原剂还原成粗金粉,工艺成本低、高效环保,可用于企业规模化生产。     

铅阳极泥处理技术的研究进展

铅阳极泥是粗铅电解精炼过程产出的一种副产物,是重要的二次资源,富含多种有价金属元素.从铅阳极泥资源中综合回收金、银等有价金属元素越来越受到重视.论文详细介绍了近年来铅阳极泥火法处理工艺、湿法处理工艺、火法-湿法联合处理工艺的研究进展,并对真空处理技术及直接制备纯物质技术进行了报道.针对云南某冶金企业高铋砷铅阳极泥的特点,作者所在课题组提出“加压氧化碱浸脱砷锑铅-熔铸粗铋合金-铋电解精炼”的处理新工艺,在分离砷锑铅的同时,实现了铋的清洁提取与金银的高度富集.结果表明:铋的回收率>98 %,锑、铅的回收率>96 %,金的回收率>99 %,银的回收率>97 %.铋电解阳极泥中金、银含量从铅阳极泥原料中的22 g/t、3 595 g/t分别富集到201 g/t、31 270 g/t.      

从银电解阳极泥中氯化萃取金的工艺研究

金电解是传统的铜铅阳极泥火法处理工艺中金精炼提纯的关键工序.该工艺存在生产周期长、金直收率低、金属占用量大、资金积压严重等弊端.采用氯化浸出-萃取提金的方法取代金电解工艺,可缩短金的生产周期,减少金属占用,加快资金周转.采用选择性极佳的二异辛基硫醚（S219）作为金的萃取剂,并添加2#添加剂,抑制钯的萃取动力学速率,控制适当的平衡时间,使金钯实现分离,满意地从银电解阳极泥中提取金,金粉质量稳定达到国家标准Au-1的指标要求.金的生产周期大为缩短,各项技术经济指标优于传统工艺,经济效益显著.     

从铜电解阳极泥中提取金银的萃取工艺

从铜电解阳极泥中提取金、银萃取工艺 .本发明所属领域为贵金属提取 .铜阳极泥是获取金、银的重要原料 ,目前不论是火法还是水法处理流程所得金、银产品 ,大多需要用电解法精炼 ,限制了金、银收率的提高 .本发明提出了用二 ( 2 -乙基己基 )硫醚萃取金、银的处理铜阳极泥的工艺流程 ,可革除电解工序 ,简化流程 ,提高收率 .本发明适用从各种铜、铅阳极泥以及含金银的物料中提取金、银 .流程包括如下主要工序 :预处理 ,硝酸浸银 ,萃取提银 ,硝酸不溶渣用王水浸金 ,萃取提金从铜电解阳极泥中提取金银的萃取工艺@华亭亭$清华大学 @席德立$清华…     

降低阳极泥产出率的生产实践

由于原料日趋复杂,导致铜电解阳极泥的产出率大大超过原工艺设计值.通过采取一系列相应措施,使阳极泥产出率控制在0.7%以下,同时阳极泥金、银含量也有所提高.     

奥托昆普波里精炼厂从铜阳极泥中回收硒及贵金属

奥托昆普波里脱铜精炼厂的阳极泥处理包括如下阶段:用空气氧化浸出铜:在200℃的浓硫酸中溶煮阳极泥脱镍,并使生成的硫酸镍溶于水中;在600℃下的保护气氛中焙烧阳极泥除去硒;用金银炉熔炼阳极泥;电解精炼银;用硫酸和王水浸出银电解阳极泥;随后还原金及铂族金属,本文讨论了操作经验及过程的最新发展。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.