某锰银矿中银赋存形式的电子探针研究

主要介绍应用电子探针研究某锰银矿矿物,通过电子探针研究了某地锰银矿矿物成分,银的赋存状态等。研究结果表明,该锰银矿以锰榍石和针铁矿为主,含方解石、石英等脉石矿。矿样中的锰矿、铁矿、铅矿、锌矿、砷矿等矿物为细粒状相互伴生矿物,银主要以元素形态赋存在锰矿物中,自然银和辉银矿在锰银矿中微量,粒度小于5μm。     

黑龙江省二道坎银矿床银的赋存状态及矿床成因

二道坎银矿床是黑龙江省多宝山矿集区内新发现的首个独立银矿床。通过矿相学研究和电子探针测试,确定了该矿床银矿物主要为深红银矿、脆银矿、辉银矿,其他含银矿物有方铅矿、黄铁矿、闪锌矿、锰铅矿、软锰矿。银的赋存状态主要为独立银矿物,其次以亚显微包体、类质同像和离子吸附态形式赋存。独立银矿物嵌布类型有包裹银、粒间银和裂隙银。矿床成因研究表明,热液期为主成矿期,表生期具有次生富集的潜力,热液期的硫化物阶段Ⅰ为主成矿阶段,初步认为该矿床属于浅成低温热液型矿床。     

锰硅型银矿石选冶工艺研究

额仁陶勒盖锰硅型银矿石,银含量500g/t左右,锰17.42％,矿石中银锰共生十分密切,银主要以类质同象形式赋存于硬锰矿中,属难选矿石。本文详细阐述了该类型矿石的选冶试验研究情况,采用了磁选、中温氯化焙烧、氨水浸银联合工艺流程,有效地分离了银、锰,取得了十分理想的技术指标。     

从锰银矿中湿法提取锰、银工艺研究

某蚀变型锰银矿中,锰主要以二氧化锰形式存在,银以独立银矿物存在。针对选矿预富集得到的锰银矿混合精矿,研究了以玉米秸秆为锰还原剂,用硫酸浸出锰和银,得到了符合GB1622—1986的硫酸锰和金属银。该新工艺适用于处理低品位MnO2矿石,是一种有效利用锰银矿资源的可行方法。     

银锰矿中锰矿物的铁屑还原浸出工艺研究

某银锰矿中银品位为3.15×10-4,锰品位为13.28×10-2。锰矿物主要为硬锰矿和软锰矿,90%以上的银以类质同象形式分布于锰矿物中,锰银分离是实现银回收的关键。文章用铁屑作还原剂,在酸性条件下湿法浸出锰,实现锰银分离,为后续银回收工艺创造条件。当磨矿细度为小于0.074 mm粒级占80%,铁矿比1∶13,酸矿比0.6∶1,液固比3∶1,室温下浸出60 min时锰的浸出率大于97.60%,较好地实现锰银分离。     

银锰矿中锰的铁屑还原浸出工艺研究

某银锰矿中银品位3.15×10-2%,锰品位为13.28%。锰矿物主要为硬锰矿和软锰矿。90%以上的银以类质同象形式存在于锰矿物中,锰银分离是回收银的关键。用铁屑作还原剂,在酸性条件下以湿法浸出可将锰银分离。当磨矿细度小于0.074 mm占80%,铁屑与矿石质量比1∶13,酸与矿石质量比0.6∶1,液固体积质量比3∶1,室温下浸出60 min时,锰的浸出率大于97.60%,而银留在渣中,较好地实现了锰银分离。     

广东锰矿的矿物学特征

本文通过对广东省锰矿的物质组成研究,介绍了广东省境内锰矿的矿石特点,矿物组成,矿石结构构造等特征。文章指出了广东省锰矿点多面广,大多属于低磷中铁酸性氧化锰矿石,矿石品位高,有的矿床含锰45％以上,很多矿床还伴生有银、铅、锌等多种有用元素,是理想的化工和冶金用锰。通过大量的研究工作捐出,广东地区锰矿的主要锰矿物有钡镁锰矿、碱硬锰矿、恩苏锰矿、隐钾锰矿、软锰矿、黑锌锰矿、铅硬锰矿等,并对几种常见锰矿物的性质、特征、嵌布情况进行了详细描述。     

锰银矿同步浸出锰、银新工艺试验研究

介绍了在H2O2体系中处理锰银矿新方法。针对矿石中锰和银的赋存形式,采用在硫酸溶液中加入H2O2可以实现二氧化锰还原和银氧化同时进行。为了进一步提高银的浸出率,在溶液中加入高锰酸钾,以浸出未被二氧化锰包裹的银。研究结果表明,在最佳浸出条件下,锰浸出率可达到96．71％,银浸出率达85．1％。     

云南北衙金铁氧化矿金银赋存状态与选冶回收研究

通过光学显微镜(OM)观察,采用扫描电镜能谱仪(EDS)、电子探针(EPMA)及矿物自动检测仪(MLA)等分析技术,结合电子探针元素面扫描分布,对云南北衙地表金铁氧化矿的矿物组成、金银矿物嵌布特征、金银平衡分配以及赋存状态进行了系统研究,并优化了选矿工艺流程及选矿回收指标。研究结果表明,矿石中的金以独立矿物形式为主,少量以微细粒包裹体或吸附态形式赋存于载体矿物褐铁矿中。通过细磨,嵌布于其载体矿物中的绝大部分金粒可单体解离。矿石中银的赋存状态较复杂,其主要载体矿物为铅硬锰矿与褐铁矿,除少量呈独立显微银矿物外,绝大多数银为不可见银。独立显微银矿物主要有自然银、螺状硫银矿、角银矿、硫锑银矿等,可通过细磨获得解离。不可见银主要以类质同象形式赋存于铅硬锰矿中,其次为褐铁矿,很难直接氰化浸出,只能通过破坏载体矿物的晶体结构才能加以回收。在金银赋存状态研究基础上,采用"粗磨-弱磁选-强磁选-分流物料分别提取金银"新选矿工艺流程,金、银、铁回收率分别由88.15%, 30.26%和27.15%提高至93.05%, 74.34%和70.86%。     

青海某金银多金属矿床金银的赋存状态研究

通过显微镜及能谱分析手段对青海某金银多金属矿石中金、银的赋存状态进行详细的研究。结果表明,矿石中金矿物主要为银金矿,全为显微金,嵌布状态以硫化物包裹金为主,粒间金较少;银矿物以银金矿、辉银矿为主,其次部分以类质同象形式赋存于银黝铜矿中,主要载金、银矿物有黄铁矿、毒砂、方铅矿、白铅矿等。对金、银赋存状态的研究为选矿工艺设计提供了依据。     

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.