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生物制剂浸金性能研究 总被引:6,自引:2,他引:4
本文简要论述了生物制剂浸金的原理。选用富含蛋白质的食品工业下脚料经水解改性以后,制备成生物浸金制剂。研究池矿浆浓度、氧化剂浓度、浸出温度和浸出时间对金浸出的影响。结果表明,在选择的条件下,生物浸金制剂对氧化型金矿石金的浸出率大于95%,对经过细菌预氧化的难浸金精矿金的浸出率与氰化法相同。 相似文献
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综述了难浸金矿生物堆浸的历史及现状,比较了国内外在该技术领域的差距,分析了其中存在的问题。认为我国通过近20 年的开发研究,目前仍处于室内与现场交替试验时期。通过室内试验和现场实践,从矿石性质角度分析认为酸耗量、渗透性差、硫含量低和金矿物受机械包裹的难浸矿石在目前条件下仍难以用生物堆浸的手段予以处理。另外,还从试验周期、室内外试验结果的差异、自然条件和氧化菌种等方面探讨了生物堆浸技术发展所需的环境和条件,提出了相应的对策。最后,通过对我国现有的资源优势、目前的市场条件、近年来我国在该技术领域的开发经验及该技术延伸领域(难浸金精粉的堆式生物氧化、难浸金矿的堆式生物氧化+ 炭浸提金) 应用探讨,认为生物堆浸技术在难浸金矿资源的开发利用领域有着广阔的应用前景。 相似文献
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某金矿石的石硫加碱催化合剂法浸金研究 总被引:1,自引:0,他引:1
某金矿石Au的品位为2.54 g·t-1,矿石以氧化矿为主,矿石中金嵌布粒度极细,与脉石互相包裹,难以解离,属于难浸类金矿石。石硫加碱催化合剂是一种混合型浸金药剂,它是以石硫合剂为基本组分,加入了稳定剂(亚硫酸钠等)与抗硫系(如S,As等)干扰剂(铜氨络离子)等,使用起来比石硫合剂方便。对矿石进行了石硫加碱催化合剂法搅拌浸金研究,考察了磨矿细度、氧化剂种类、H2O2浓度、矿浆pH、搅拌时间对金浸出率的影响。相比KMnO4,CaO2等氧化剂相比,H2O2具有浸金率高,工业生产操作方便等优点。确定最优实验条件为:液固比为2.0,磨矿细度-74μm占91%,所用氧化剂为H2O2,浓度为0.02 mol·L-1,pH值为12~13,搅拌时间为3.5~4.0 h,此条件下金浸出率可达72.6%。浮选法及氰化浸金法中金的回收率分别为70.5%和68.1%。与浮选法、氰化浸金方法比较,此方法具有药剂廉价易得、工艺简单、环保等优点,可望成为黄金提取的主要方法之一。 相似文献
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<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 相似文献
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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, 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
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 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
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 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
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, 相似文献
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《China Nonferrous Metals Monthly》2014,(12)
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. 相似文献
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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. 相似文献
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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. 相似文献