某难选多金属硫化矿浮选分离试验研究

某地难分选铅锌矿石,由于铜、铅、锌矿物共生关系复杂,嵌布粒度粗细不均匀,含铜矿物天然活化锌矿物,致使铜、铅、锌矿物难以分选。试验采用细磨(90%-74μm),优先浮选工艺流程,添加组合抑制剂使铜、铅、锌矿物有效分离,获得互含合格铅、锌精矿,银同步富集在铅精矿中,并使铅精矿中杂质铜转化为可销售副产品,伴生组分得到最大限度综合回收,增加主产品铅、锌附加值,提高了综合技术指标和综合经济指标。     

国外某铜铅锌多金属矿工艺矿物学特性及影响浮选的因素

国外某铜、铅、锌多金属硫化矿,矿石性质复杂,采用化学分析、MLA矿物自动检测系统及光学显微镜等测试手段,进行详细工艺矿物学研究。结果表明:该矿石中铜锌硫化物嵌布关系密切而复杂,闪锌矿中镶嵌微细粒黄铜矿,对铜锌分选产生不利影响。方铅矿主要充填在闪锌矿颗粒间,少部分方铅矿与黄铁矿、黄铜矿、脉石矿物构成连晶或包裹。矿石中含有大量的白云石、绿泥石,磨矿过程中易泥化,恶化浮选矿浆环境,对铜铅锌浮选分离造成不利影响。因此,选择磨矿细度应适宜。     

某铜铅锌矿石中主要金属矿物的工艺矿物学特征

某铜铅锌多金属矿石矿物组成复杂,为了解各主要金属矿物的工艺矿物学特征,进行了铜铅锌赋存状态分析和黄铜矿、方铅矿、闪锌矿的嵌布特征及嵌布粒度分析。结果表明,矿石中铜主要以原生硫化铜和次生硫化铜的形式存在,主要铜矿物为黄铜矿,与黄铁矿、闪锌矿嵌生关系密切,黄铜矿呈不规则粒状集合体,少见自行晶,粒径大小不一,主要在0.02~0.20 mm;矿石中的铅主要以硫化铅的形式存在,主要铅矿物为方铅矿,呈他形晶粒状结构,粒径在0.05~0.20 mm,主要分布于黄铁矿、闪锌矿粒间,与黄铁矿、闪锌矿接触嵌生;矿石中的锌主要以闪锌矿的形式存在,闪锌矿主要呈他形晶粒状集合体或致密块状出现,也有的与其他金属硫化物一起呈浸染状、条带状分布在矿石中,既与黄铁矿一起被方铅矿交代,又单独交代黄铁矿,嵌布粒度大于1.0 mm的闪锌矿占49.3%,大于0.074 mm的占94%,说明闪锌矿的嵌布粒度较粗,单体解离较容易。铜铅锌的工艺矿物学特征分析为制定合理的选矿流程提供了矿物学依据。     

青海某铜铅锌多金属矿工艺矿物学研究

为给青海某铜铅锌多金属矿石的开发利用提供依据,对其进行工艺矿物学研究,查明了矿石的组成、结构、构造及铜、铅、锌的赋存特征和主要矿物的嵌布特性等。矿石铅、锌品位分别为1.51%、2.91%,铜、金和银含量分别为0.091%、0.17 g/t、12 g/t,可进行综合利用。铜、铅、锌均主要以硫化物的形式存在,方铅矿、闪锌矿、黄铜矿分别是铅、锌、铜的主要回收目的矿物,但金属硫化物间及硫化物与脉石矿物间嵌布关系密切、复杂,会对铜铅锌的分选产生不利影响。     

重晶石型复杂嵌布铜铅锌次生硫化矿的可选性研究

某铜铅锌次生硫化矿含大量重晶石,有用矿物嵌布关系复杂、粒度细,铅氧化率28.32%。矿石中的方铅矿和闪锌矿因夹杂细小铜矿物而自活化,抑制分离浮选困难,常规选矿方法和药剂难以分离出单一铜、铅、锌精矿。试验建议采用粗磨铜铅锌等浮流程,可获得铅+锌品位大于50%的含铜铅锌混合精矿,各金属回收率也较高。混合精矿再用专利冶金方法处理。     

汉吉兹矿床的多金属矿石选矿工艺的制定

乌兹别克斯坦共和国汉吉兹铜铅锌多金属矿石由于矿物嵌布粒度细,含有次生硫化铜矿物,属于难选多金属矿石.提出了铜--铅混合浮选、铜铅混合精矿分离浮选和从铜铅混合浮选尾矿中浮选闪锌矿工艺流程.在铜--铅混合浮选回路中采用硫酸锌作为闪锌矿的抑抑剂,用丁基黄药和黑药混合浮选铜和铅矿物.在铜铅混合精矿分离中,用活性炭和硫化钠及洗矿后解离矿物表面上的药剂,用硫酸将矿浆调至酸性pH,再用亚硫酸钠作为方铅矿的抑制剂,用黄药浮选硫化铜矿物.用硫酸铜活化闪锌矿,用黄药和黑药捕收剂从混合浮选尾矿中获得锌精矿.该工艺流程获得质量合格的铜精矿、铅精矿和锌精矿,铜、铅和锌的回收率分别为69.2%～72.7%,74.7%～78.5%和80%.     

江西某铅锌矿石工艺矿物学研究

江西某铅锌矿在现采矿境界下部发现较大新矿体,为确定新探明资源的合理开发利用工艺,对新探明资源进行了工艺矿物学研究。结果表明：该矿石中矿物种类复杂,有用元素主要有铅、锌、银、金等,主要铅、锌、银矿物有方铅矿、闪锌矿、硫锑铅银矿、硫锑铜银矿。铅锌矿物嵌布特征复杂,共生关系密切,受构造应力作用破坏,闪锌矿碎裂成碎粒,被黄铁矿、方解石等胶结;银矿物在方铅矿中呈蠕虫状、微脉状分布。方铅矿、闪锌矿均为极不等粒嵌布,矿石属难解离、难分选铅锌矿石。最后指出了选矿试验研究过程中应重视的几个问题。     

郭家沟铅锌硫化矿工艺矿物学特征及 浮选原则工艺的确定

郭家沟铅锌矿是我国新近发现的大型铅锌矿床,铅锌金属储量较大,为高效开发利用该铅锌资源,采 用化学分析、XRD、显微镜观察分析等手段,对该矿石进行了详细的工艺矿物学研究,并探究了该铅锌矿石的浮选 原则工艺。结果表明,铅锌矿属轻微氧化的硫化铅锌矿石,矿石中主要回收的有价金属为铅、锌及其伴生银,其含 量分别为 1.85%、5.75% 和 39.95 g/t;方铅矿和闪锌矿是铅、锌的主要赋存矿物,多以中细粒嵌布在矿石中。方铅矿 以显微文象状交代闪锌矿、包裹交代黄铁矿,有的呈星点状、大小不等分布于石英和方解石中;闪锌矿常见包裹方 铅矿、黄铁矿、方解石微粒,被方铅矿交代穿切。方铅矿的嵌布粒度较闪锌矿细,选择合适的磨矿细度是铅、锌高效 分离的前提。在工艺矿物学研究的基础上,确定了铅优先浮选原则工艺流程。以新型高效捕收剂 LP-12 为铅捕收 剂,在磨矿细度为-0.074 mm 占 75% 条件下,经 1 粗 3 精 1 扫选铅,选铅尾矿经 1 粗 1 精 1 扫选锌小型闭路试验,可获 得铅品位 55.08%、铅回收率 91.70%、银品位 896.93 g/t、银回收率 69.15% 的铅精矿,锌品位 55.05%、锌回收率 93.92% 的锌精矿。试验研究成果可为该铅锌矿石的开发利用提供技术支撑。     

从矿石中浮选铅矿物时浮选剂的作用

硫化矿物中方铅矿和黄铁矿最常见,闪锌矿、辉铜矿和铜兰较少。氧化矿中分布最广的为白铅矿和铅矾,亦常遇到锌、铁、锰的氧化矿物,铅铁矾不多。矿物在矿石中呈细粒嵌布,40～60％的方铅矿、铅矾和白铅矿粒度小于20微米,该粒级的闪锌矿和黄铁矿含量达80％。     

印尼某地难分离铜铅锌多金属矿选矿技术研究

对印尼某地难选铅锌铜多金属矿进行了系统的工艺矿物学和选矿试验研究。该矿中黄铜矿与黄铁矿(磁黄铁矿)、闪锌矿共生关系密切,嵌布粒度较细,部分黄铜矿呈微细粒乳滴状于闪锌矿中,造成黄铜矿难以同方铅矿一起被优先浮出;闪锌矿易浮难抑制。经多方案试验确定宜采用优先选铅,其最终闭路试验获得铅品位61.65%、铅回收率81.64%的铅精矿,锌品位50.29%、锌回收率93.78%的锌精矿。     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

唐口煤矿深部复杂开采工作面瓦斯分源涌出规律研究

研究工作面瓦斯涌出规律对工作面瓦斯治理有重要意义。为了得到唐口煤矿深部3号煤层复杂开采条件下工作面回采时期瓦斯涌出时空演化规律,选取6304工作面作为对象,采用实测方法研究6304工作面瓦斯涌出规律。结果表明:6304工作面瓦斯涌出量为6.534 m³/min,其中煤壁占34.27%,落煤占29.62%,采空区占36.11%;沿工作面倾向由低到高,瓦斯浓度整体为上升趋势,其中1—76号架工作面瓦斯浓度小于0.20%,76—102号架瓦斯浓度上升明显,最大为0.387%;上隅角的后部采空区是工作面的瓦斯主要涌出源,上隅角1号测点瓦斯浓度0.78%,上隅角周边3号、5号、7号、8号、9号测点瓦斯浓度平均为0.643%;周期来压时,上隅角瓦斯相对平时较高。研究为针对性的瓦斯分源监控与灾害防治提供基础。