难选氧化铜矿的超声波助浸研究

选取某难选氧化铜矿为对象,进行超声波助浸试验,当超声波发生器振幅为70%、助浸时间为15min时,铜浸出率为59.35%。超声波助浸较传统搅拌酸浸,浸出时间缩短了7倍,铜浸出率提高了4.95个百分点。采用超声波助浸—浸渣浮选新工艺处理该氧化铜矿,获得了闭路铜总回率90.91%的较好指标。     

某氧化铜钴矿酸浸试验研究

针对刚果（金）某氧化铜钴矿进行了搅拌酸浸、搅拌还原-酸浸和淋滤还原-酸浸对比试验研究,确定了搅拌还原-酸浸是处理这种氧化铜钴矿的最佳方法,不但浸出速度快,而且浸出效果好,铜浸出率达到93．88％,钴浸出率达到95．2％;同时证明了采用堆浸（淋滤还原-酸浸）也是处理这种矿石的另一条重要的途径,也可得到理想的指标。     

某铜钴矿的硫酸还原浸出研究

研究了刚果(金)某铜钴矿的硫酸还原浸出。结果表明,在矿样粒度为-0.074mm占90%、终点pH为1.5、SO2用量为理论量的1.5倍(4kg/t)、浸出温度80℃、浸出时间120min、液固比4∶1的条件下,铜、钴浸出率分别达到了93.35%和90.13%。在此基础上进行了模拟堆浸的柱浸试验,柱浸采用先浸铜再还原浸钴的分步浸出方式,铜浸出率达72%,钴浸出率为66%。     

老鸦冲铜矿氧化矿石室内可浸性试验研究

针对安徽岳西老鸦冲铜矿氧化矿进行了室内搅拌浸出和摇瓶试验,试验表明,该矿石经过28d摇瓶酸浸,浸出率达到84%以上,耗酸折算后每吨电解铜消耗硫酸2.5 t,浸出酸耗较低。     

某种铜钴矿的浸出过程试验探索

通过对铜钴矿的浸出试验探索,得出铜钴矿样为含钴氧化矿,适宜还原酸浸,浓硫酸酸浸效果更好,还原体系为双氧水与亚硫酸钠组合。最优试验条件为液固比5∶1,加入浓硫酸理论量的1.5倍,按照先后顺序加入双氧水量为矿样质量55.5%和亚硫酸钠量为矿样质量10%,温度70℃,反应时间30 min。在最优的试验条件下进行铜钴矿的浸出试验,钴的浸出率达到99%以上,铜的浸出率达到98%以上。     

废钴酸锂和钴白合金联合酸浸试验研究

利用废钴酸锂的氧化性和钴白合金的还原性,采用联合酸浸的方式处理废钴酸锂和钴白合金。本研究考察浸出时间、浸出温度、浸出过程pH值、废钴酸锂和钴白合金质量比对钴、铜浸出率的影响,得出联合酸浸的最优条件为:浸出时间4h、浸出温度70℃、浸出过程p H控制范围0.9~1.1,废钴酸锂与钴白合金的质量比为2.6:1,此时钴的浸出率为99.71%,铜的浸出率为98.55%。     

双氧水还原浸出非洲氧化铜钴矿的试验研究

采用双氧水还原浸出非洲氧化铜钴矿,研究了还原剂用量、初始酸浓度、液固比、浸出温度和浸出时间等参数对浸出过程的影响。结果表明:使用双氧水与铜钴矿计量比为0.2mL/g、浓硫酸与铜钴矿质量比为0.46、液固比为5∶1(mL/g),在温度75℃下浸出2h,钴、铜的浸出率分别达到了99.50%,99.42%。     

采空区存窿铜矿石室内可浸性试验研究

针对寿王坟铜的空区存窿矿石进行了室内摇瓶浸出试验和柱浸试验，试验表明寿王坟铜矿的矿石仅采用化学浸出，铜的浸出率较低，为465左右，采用细菌浸出可将铜的浸出率提高26％，达72％，铜的浸出率与矿石的粒度成反比，即矿石的粒度越大，铜的浸出率越小，在生产中，先用酸浸出，然后再用细菌浸出的方案，既可加快铜的浸了同，又可以降低浸矿时的酸耗，降低生产成本。     

基于正交设计法的西藏玉龙铜矿酸浸工艺研究

为了提高西藏玉龙铜矿铜氧化矿的酸浸效率,采用正交设计法优化了酸浸过程中的各项参数,以期提高铜浸出效率,为中试及工程化生产提供理论依据.首先研究了氧化铜矿硫酸浸出的单因素最佳区间,然后针对温度、初始酸浓度、浸出时间、液固比和磨矿细度等多因素进行了正交优化.结果表明:这些因素对浸出过程均有影响,其中温度影响最大.通过参数优化,最终确定搅拌浸出最优工艺条件为:温度30℃、初始酸浓度100 g/L、浸矿时间2 h、液固比(指质量比)2∶1、磨矿细度为粒径≤74μm的物粒占65%.此时,铜氧化矿中铜浸出率可以达到79.45%.     

某混合铜矿生物浸出铜的试验研究

研究了采用细菌氧化-硫酸浸出法从某低品位混合铜矿中浸出铜.采用摇瓶浸出、模拟半连续搅拌浸出和柱浸,考察了浸出过程中铁、氮、磷浓度对生物活性的影响.结果表明:摇瓶浸出试验中,矿浆浓度为10％、浸出6d以上条件下,铜浸出率为66.0％以上;铁、氮、磷质量浓度越高,越快被消耗;pH控制在2.0时,铁、氮、磷质量浓度分别降至100、200、5 mg/L,菌液仍保持较高活性.模拟半连续浸出试验中,矿浆浓度为10％时,铜浸出率超过75％,最高达85.3％;柱浸试验中,氧化浸出23周,铜浸出率为71.0％;矿石浸出时消耗磷,应适当补加.     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

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.