某低品位难选铜钨硫化矿工艺矿物学研究

某铜钨硫化矿矿物组成复杂,Cu、W品位低且与脉石矿物嵌布粒度细,分选提纯困难。为了确定合理的分选工艺,针对该矿石开展工艺矿物学研究,分析了矿石的化学组成、矿物组成及与脉石矿物嵌布粒度分布特征,为后续的分选工艺确定奠定基础。     

上饶某铜硫矿石工艺矿物学研究

针对上饶某铜硫矿入选矿石锌矿物含量升高，导致硫精矿锌含量超标，影响矿山的正常生产和经营问题，为寻求解决办法，首先开展了矿石的工艺矿物学研究。结果表明：①矿石性质较复杂，可供选矿回收的元素主要是铜和硫，含量分别为0.58%和10.20%，锌、银含量分别为0.42%和16.44 g/t，可综合回收。矿石中的主要脉石矿物为石英、碳酸盐矿物以及铝硅酸盐类矿物。②矿石主要结构有自形—半自形粒状结构、他形粒状结构、交代结构、粒状镶嵌结构和充填结构，少量胶状结构。主要构造有浸染状构造、条带状构造、细脉状构造，少量块状构造。③黄铜矿和闪锌矿呈中细粒嵌布的特征，黄铁矿呈中粗粒嵌布的特征。黄铜矿粒度相差悬殊，形态变化较大，嵌布关系复杂，欲提高铜精矿品位须对粗精矿进行细磨。黄铁矿大部分结晶较好，适合在较粗磨矿细度下解离回收。④结合现场情况和锌矿物的存在状态，可考虑对锌矿物进行活化、浮选，从而解决硫精矿含锌超标的问题。     

甘肃某铁矿石工艺矿物学研究

为了更好地指导甘肃某铁矿石的选矿试验,对该矿石进行了工艺矿物学研究。结果表明：①铁品位为37.89%的铁矿石为半自熔性、低硫磷磁铁矿石,有回收价值的铁矿物为磁铁矿,磁性铁占总铁的79.31%。②矿石的主要构造类型为块状构造,其次为浸染状构造和条带状构造;矿石的主要结构类型为他形-半自形粒状结构、包含结构。③以较粗粒嵌布（0.045～0.2 mm）的磁铁矿约占65%,这些磁铁矿颗粒大多被角闪石和石英颗粒分割;粒度为0.025～0.045 mm的细粒嵌布的磁铁矿约占20%,大多呈稀疏和稠密浸染状分布在脉石矿物中;微细粒中,嵌布粒度为0.01～0.025 mm和-0.01 mm的磁铁矿分别约占10%和5%。因此,该矿石中的磁铁矿宜采用干式预选抛废-阶段磨矿阶段弱磁选工艺回收,并应在坚持能收早收、减少磁铁矿过磨的基础上,加强-0.025 mm微细粒磁铁矿的回收,以确保磁铁矿的回收率。     

云南某金多金属矿的工艺矿物学研究

为配合云南某多金属矿的矿石可选性试验,对该矿进行了详细的工艺矿物学研究。查明了矿石的矿物组成,重要矿物的赋存状态、嵌布特征、粒度组成、解离度特征以及影响选矿回收指标的矿物学因素等。研究表明,矿石中金、银矿物嵌布粒度细且与多种矿物共生密切,除了与黄铜矿、方铅矿、黄铁矿等硫化物共生外,还与磁铁矿、菱铁矿存在紧密嵌布关系,因此加强回收铁矿物中的金、银是提高回收率的关键。此外,黄铜矿、方铅矿和闪锌矿分别是铜、铅、锌回收的目标矿物,磁铁矿和菱铁矿是可综合回收的主要铁矿物。     

西藏多才玛铅锌矿石工艺矿物学研究

为给西藏多才玛铅锌矿详查阶段矿产评价提供依据，对其进行了详细工艺矿物学研究。研究结果表明:该矿石含Pb为4.21%、Zn为2.81%，银、镉、硒、碲和铊分别为27 g/t、0.017%、0.002%、0.03%、0.023%，可进行综合回收利用。铅主要以方铅矿的形式存在，锌主要以闪锌矿的形式存在。方铅矿、闪锌矿为主要回收目的矿物。铅、锌矿物嵌布关系复杂，与其他矿物紧密接触，分离较困难。方铅矿嵌布粒度相对较粗，有利于选矿回收，而闪锌矿嵌布粒度较细，-0.02 mm粒级以下含量高达22.07%，选矿难度大，需要进行细磨工作，才能提高回收率。此外，脉石矿物主要为方解石、石英，具有易磨碎、易泥化等特点，将给铅、锌矿物分选带来不利影响。      

某白钨矿工艺矿物学特征研究

采用化学分析、显微镜和MLA矿物自动检测技术等手段,对某白钨矿石进行工艺矿物学研究,重点查清了该矿石的物质组成,白钨矿的嵌布特征和赋存状态。为选矿回收矿石中的有价组分提供依据和指导,揭示了对白钨矿选矿影响的因素。结果表明,矿石中的主要金属矿物为白钨矿和微量赤铁矿;脉石矿物以方解石、萤石为主,还有部分白云石、磷灰石、白云母等。钨矿物属微细粒嵌布,单体解离度为58.07%白钨矿主要与脉石矿物萤石、方解石、白云母等矿物有密切共生组合关系。     

铁山矿区某铜矿工艺矿物学研究

为充分了解镜铁山矿区某铜矿工艺矿物学性质,并为制定合理的分选工艺提供基础资料,采用化学分析、X射线衍射、筛分分析、显微镜检测等分析手段,对镜铁山矿区某铜矿矿石的化学组成、矿物组成、矿物粒度特征和主要矿物的嵌布特征进行了详细研究。结果表明：该铜矿石矿物种类复杂,脉石成分较多,主要矿物嵌布关系复杂,嵌布粒度粗细不均。矿石中黄铜矿以中细粒嵌布为主,粒度不均匀,呈两极分化的特征,需结合选矿试验确定最佳的磨矿条件。研究结果对镜铁山矿区铜矿的合理开发利用具有一定指导意义。     

赣北某钨钼矿钨矿石工艺矿物学研究

为了给赣北某钨钼矿的选矿工艺流程选择提供依据,采用显微镜、化学分析、XRD分析等分析测试手段对钨矿石进行了工艺矿物学研究。研究表明,矿石矿物成分复杂,主要有用矿物为黑钨矿、黄铜矿、白钨矿、辉钼矿等。矿石主要有用元素为钨,WO3含量0.264%,可以进行回收利用,伴生铜、钼等也可以综合回收利用。钨主要以黑钨矿和白钨矿形式存在,二者关系密切;伴生铜、钼主要以硫化物形式存在。黑钨矿以半自形板状和它形晶粒状沿石英裂隙及间隙不均匀分布,并受黄铜矿、白钨矿等中后期矿物交代。钨矿物可采用分级重选工艺回收,铜、钼可采用多段磨选工艺综合回收。     

广东某铅锌多金属矿工艺矿物学研究

为合理高效利用某铅锌多金属硫化矿资源,采用化学分析、透光显微镜、能谱仪、扫描电镜等分析手段对其进行了工艺矿物学研究。结果表明,该铅锌多金属硫化矿含Pb 1.398%、Zn 3.640%、Ag 127.3g/t、CaF_210.160%、WO_30.10%。岩石主要为块状构造,结构主要为斑状变晶结构、柱状和粒状变晶结构,交代残余结构等形态。矿石中的主要矿物为黄铜矿、方铅矿、闪锌矿,伴生银和萤石可综合回收。矿物组分多样,矿物间嵌布关系复杂而密切,分离难度大,推荐采用铜铅锌混合浮选—萤石浮选—白钨浮选的工艺流程。     

某硫化铜矿工艺矿物学研究北大核心

为充分了解某硫化铜矿矿石性质,制定合理的选别工艺流程,利用化学多元素分析、化学物相分析、光学显微镜及MLA(矿物特征自动定量分析仪)等综合手段,对矿石化学成分、矿物组成、主要有用元素的赋存状态以及主要矿物的嵌布特征等进行分析研究。结果表明,该矿石主要目的元素为Cu,品位为1.08%,伴生稀贵金属元素金、银品位分别为0.33 g/t和12.07 g/t。黄铜矿为主要含铜矿物,其嵌布粒度不均匀,以中细粒嵌布为主,且与脉石矿物及其他金属矿物共生关系复杂,需在选矿中细磨以实现单体解离。伴生金元素主要以自然金的形式存在,且嵌布粒度较细,共生关系复杂,采用常规选矿方法回收难度大;伴生银元素分布较分散,在独立矿物硫银铋矿中的分配率较低,独立回收难度较大。根据以上结果,建议采用“铜硫混浮-铜硫分离”的选矿工艺流程,并对铜硫混合粗精矿再磨后进行铜硫分离,银可在铜、硫精矿中计价回收,金则需采取化学选矿的方法进行回收。     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

Brief news

正Corun invested another 50 million yuan in power battery for HEV Hunan Corun announced on 27 June that they had signed the cooperation agreement to jointly built Corun(Shaoxing)Autos Power Battery System Co.,Ltd.in Shaoxing Binhai New City.According to the announcement,total registered     

China rare earth market review

正November 1~10,2014Chinese rare earth market was still inactive.Demand for rare earth products was weak.Consumers took a wait-and-see attitude for lower price.As it was an off season for rare earth products,it was expected that prices of rare earth could continue turbulence at the bottom in short terms.Due to a sharp drop,demand for rare earth from downstream recovered.Affected by new energy vehicles,wind powder and energy-efficient appliances,production of rare earth permanent     

China rare earth market review

正August 1~10,2014 There was some good news in rare earth industry recently.Restructuring plans of rare earth groups led by Baotou IronSteel Group and Xiamen Tungsten Group respectively have been approved by MIIT.And rare earth storage policy,which had been expected for a very long time,has been launched officially.Pushed by the good news,rare earth price started to rebound since August 5.Price of didymium oxide and dysprosium oxide rose about 1% to 2%,averagely.About 10% of     

China rare earth market review

正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,     

New energy vehicle:an opportunity for rare earth magnets

<正>Extracted from Securities Guide 1.Popularity of new energy vehicles—an irresistible market trend1.1 Progress of new energy vehicles Chinese Premier Li Keqiang said recently on a visit to Xi'an BYD Autos that new energy vehicles,especially new energy bus,can lessen environment and noise pollution.He encouraged the use of new