用盐酸浸出-水解法从分银渣中分离锑铋铜

研究了采用盐酸浸出—水解法从分银渣中分步分离锑、铋、铜和银,考察了各因素对有价金属分离效果的影响.结果表明:在盐酸浓度6 mol/L、液固体积质量比6/1、浸出温度80℃、浸出时间2.0 h、搅拌速度350 r/min条件下,锑、铋、铜浸出率分别为91.93％、96.44％ 和98.27％;通过调节富锑、铋、铜浸出液pH分步沉淀锑、铋,在p H=1.0、陈化时间4 h条件下,锑、铋水解沉淀率分别为96.21％ 和0.84％,得到锑质量分数为58.48％ 的锑富集物;控制锑沉淀母液p H=2.5并陈化4 h后,铋水解沉淀率为99.96％,得到铋质量分数为54.78％ 的铋富集物.该法可用于从分银渣中综合回收多金属.     

从铜阳极泥分银渣中回收铋和锑

采用硫酸与氯化钠的混合溶液浸出铜阳极泥卡尔多炉分银渣。结果表明,铋、锑被浸出进入溶液,铅转化为硫酸铅留在浸出渣中,从而实现铅与锑、铋的分离。在硫酸浓度2.5mol/L、氯化钠浓度125g/L、液固比4∶1、温度95℃、浸出时间4h的条件下,铋、锑、铅、银的浸出率分别为98.67%、91.17%、0.56%和0.76%,金几乎不被浸出。     

铅分银炉渣中金属赋存状态分析及银的提取试验研究

研究了铅分银炉渣中主要金属的赋存状态，并采用盐酸预处理—硫脲-硫酸浸出法从分银炉渣中提取银，考察了各因素对银浸出的影响。结果表明：分银炉渣中主要含铜、锑、铋和银，银主要以金属银与少量银铜碲化物形式存在，其中金属银主要与赤铜矿、铋氧化物和铜镁锑氧化物形成多相连生体，少部分以滴状或丝状包裹于赤铜矿等矿物中；铜、铋和锑主要以复杂氧化物形式存在，各物相间连生或共生；取盐酸预处理分银炉渣所得富银渣20 g,在硫脲用量0.92 mol/L、硫酸浓度0.51 mol/L、液固体积质量比6/1、浸出温度60℃、浸出时间4 h条件下，银浸出率可达97.95%。此法可实现银的高效提取。     

铅阳极泥中有价金属的综合回收

采用盐酸浸出铅阳极泥富集金银,考察盐酸浓度、反应温度、液固比、反应时间对盐酸浸出过程中铜、锑、铋、金、银的影响。研究结果表明,浸盐酸浓度为3 mol/L、液固比为8∶1、反应温度为85℃、反应时间为4 h时,铜、锑、铋的浸出率分别为98%、99. 5%、99. 6%;浸出后的铅阳极泥与浸出前相比,金、银富集2倍以上。     

盐酸浸出法处理铅阳极泥提取金银

盐酸浸出铅阳极泥,银直收率大于92%,总回收率大于95%,粗银品位高于99.6%。副产铅渣、锑渣、铋渣和铜渣等中间产品可供综合回收。     

二次净化渣中锑回收工艺研究

通过二次净化渣中回收锑方法研究,试验表明:对二次净化渣采用"盐酸浸铋—碱浸除砷"工艺,能使二次净化渣中锑与铋、铜有效分离、富集,且工艺简单,生产成本低。盐酸浸铋工序铋浸出率97.65%,铜浸出率97.21,锑基本残留在渣相中,通过碱浸脱砷,实现了锑的较好富集,可作为优质锑原料进入锑酸钠生产线进一步回收锑。     

NaOH—C3H8O3的水溶液体系处理冶金副产物的研究

对采用NaOH—C3H8O3的水溶液体系浸出锑、铋等贱金属并富集贵金属银于渣中,回收复杂含银渣中有价金属的工艺进行了研究。结果表明：NaOH浓度150～200g／L、C3H8O3浓度250～300g/L、反应时间4～5h、反应温度65～75℃时,铋和锑的浸出率可分别达到96％和89％,银在渣中富集高达11倍。浸出液中98％的Bi可通过硫化法以Bi2S3的形式回收,92％的sb可加稀硫酸中和得到锑氧粉,同时可实现甘油的再生。     

三氯化铁浸取法处理含锡锑铅的复杂合金

含Sn、Pb、Sb的复杂合金,用三氯化铁—盐酸溶液浸出,铁置换回收锑,铋等,中和水解回收锡。浸出渣热水浸取回收铅,除砷后的碱浸渣中可回收银和金。各种元素得到了较好的分离和回收。     

高银铋阳极泥浸出工艺研究

某厂高银铋阳极泥产粗铋及综合回收有价金属,工艺采用两段浸出法处理此阳极泥,第1段硫酸浸出铜,第2段盐酸浸出铋.分别考察了浸出温度、时间、液固比(质量比)、酸量及氧化剂用量对浸出率的影响.铜的浸出率(液计)96%以上,铋、锑的浸出率(渣计)均在99%以上,铅、银富集于第2段浸出渣中,铅、银渣含Pb 26.63%左右,含Ag 36.77%左右,铅和银的直收率高,分别为97.82%及98.93%.浸出过程为串级联动循环浸出,洗酸洗水均返回下一次浸出,大大地减少了废水量,环境友好.     

从铅阳极泥中湿法提取铋、锑试验研究

介绍了以三氯化铁作氧化剂,氯化钠提供氯离子,用盐酸从高温氧化后的铅阳极泥中浸出铋、锑,考察了氧化温度、盐酸浓度、浸出温度、反应时间、液固体积质量比、三氯化铁和氯化钠用量对铋、锑浸出率的影响。试验结果表明:铅阳极泥预处理对铋、锑浸出率影响较大;铅阳极泥粉磨过200目筛,在氧化温度220℃、盐酸浓度5mol/L、液固体积质量比5∶1、反应温度80℃、反应时间3h、三氯化铁质量浓度10g/L、氯化钠质量浓度45g/L条件下,铋、锑浸出率分别为99.44%和99.69%,浸出效果较好。     

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.