我国金属矿山选矿技术进展及发展方向

从我国铁矿石资源的特点和形势论述了选矿技术发展的迫切性,介绍了我国在磁铁矿及赤铁矿选矿技术上所取得的成绩,尤其是磁选设备和反浮选工艺研究的进展。指出今后在贫铁矿资源、复杂难选铁矿资源分选方面还需加强研究,以实现铁矿资源利用技术的整体提高。     

河北省承德市某超贫磁铁矿选矿工艺研究和开发建议

超贫磁铁矿的合理开发利用,对于挖掘我国铁矿资源潜力,提高国内铁矿资源保障程度,保证国家经济安全和经济可持续发展具有重要意义。本文对河北承德市某超贫磁铁矿开展了矿石工艺矿物学研究,从矿石矿物组成特征上,探讨了影响该类型铁矿石选矿指标的矿物学因素,对该类型矿石的选矿具有重要的指导作用。     

重磁拉磁选机在某钒钛磁铁矿粗粒抛尾中的工业应用

陕西省洋县钒钛磁铁矿矿石品位极低,铁矿物赋存状态复杂,属于难磨难选类矿石,采用传统方法钛损失量极大。为了减少选厂选矿过程中钛资源的浪费,采用ZCLA新技术对该矿球磨排矿进行了抛尾工业试验,提出了洋县超贫钒钛磁铁矿选矿新工艺。研究结果表明:在给料粒度为-5 mm,采用ZCLA粗粒抛尾新技术,抛出的尾矿TiO_2品位仅为1.62%,抛尾率为36.36%,可直接抛废,减少了36.36%的选钛磨矿量;该工艺与筒式弱磁选粗粒抛尾工艺相比,尾矿TiO_2品位大幅降低,流程简单,且运行成本更低。     

河北省超贫磁铁矿资源的综合利用

针对河北省超贫铁矿的资源情况,介绍了超贫磁铁矿的选矿工艺、钛铁矿和磷灰石的综合利用情况,简述了河北省采取的矿山环境治理措施,提出了解决对超贫磁铁矿开发利用过程中的预选、磷灰石和钛铁矿的综合利用、尾矿处理、粉尘治理等问题的建议.     

攀西钒钛磁铁矿的选矿技术现状及发展趋势

攀西钒钛磁铁矿是我国铁、钒、钛等重要战略资源,经过多年的努力,形成了采、选、冶的铁、钒及钛完整产业链,初步实现了钒钛磁铁矿的综合利用,但存在资源利用水平不高、部分有用资源未提取等技术难题,目前铁、钒和钛三种资源利用率分别为70%、41%和21%,尚未实现钴、镍、铬、钪等宝贵金属的利用。结合攀西钒钛磁铁矿的矿物学特性对该矿的选矿技术现状进行综述,表明钒钛磁铁矿通过"阶段磨矿、阶段选别"选矿方式获得铁精矿和选铁尾矿,选铁尾矿再经过高梯度强磁选—重选—浮选—电选流程获得钛精矿,钒和铬元素以类质同象形式进入铁精矿中;通过不断地优化和开发新型选矿工艺,有利于实现攀西钒钛磁铁矿的绿色高效综合利用。     

秘鲁含铁沙矿工艺矿物学研究

对秘鲁西海岸马尔科纳地区的含铁沙矿进行了工艺矿物学研究。研究结果表明:该沙矿中TFe 5.5%、MFe 1.41%、Ti 0.54%;金属矿物主要含钛磁铁矿,磁铁矿的矿物成分及其产出状态是决定选矿指标的重要因素;原沙矿中磁铁矿的单体解离度接近85%,未解离的磁铁矿主要与脉石矿物连生,若获得高品位的铁精矿,选矿时需要磨矿。通常按铁精矿含脉石矿物5%计算,理论上铁精矿品位为64.06%,对该类型铁矿的经济评价具有重要的指导意义。     

凤城硼铁矿石选矿试验研究

通过对硼铁矿矿石性质深入细致的分析,查明了磁铁矿、硼镁铁矿、硼镁石、蛇纹石等矿物的物理化学性质及工艺矿物学特征,制定了合理的选矿工艺流程,实现了铁矿物和硼镁石的综合回收利用.     

硼铁矿资源开发利用研究现状及进展

分析了我国近几年对硼铁矿资源综合利用的现状,以及在硼铁矿选矿、湿法分离工艺和火法分离工艺等方面取得的研究进展。选矿分离主要采用分级、重选、磁选、浮选等处理方法;湿法分离工艺有碱法(碳碱法)和酸法(一步法)两种处理方法;火法分离工艺有高炉法、直接还原-熔化分离法和碳热氯化法。硼铁矿石组成复杂,主要矿物有硼镁石、磁铁矿、硼镁铁矿、晶质铀矿和蛇纹石,难以采用常规的选矿方法很难分离利用其中的硼、铁有用元素,为劣质铁矿资源;硼铁矿由于硼品位偏低,铁成分高,采用常规硼化工工艺不能有效从硼铁矿中提硼,至今硼铁矿未能得到大规模的有效开发利用。因此,合理开发硼铁矿矿床,实现硼铁矿资源中硼铁镁铀等有价元素充分利用意义重大。     

攀枝花钛磁铁矿性质变化对铁精矿品位的影响

摘要:攀枝花地区钒钛磁铁矿成矿条件基本相同,岩浆晚期所产出的钛磁铁矿、粒状钛铁矿基本特征相似。但是由于成矿时地质条件的差异,矿浆物理、化学成份的变化,从而使不同矿区或相同矿区不同层位的钛磁铁矿的含铁含钛量有一定的差异。攀枝花密地、白马、潘家田三选厂的原料来自攀枝花不同矿区。在基本相同的选矿工艺条件下,其铁精矿质量有一定差异。为查明原矿性质变化对选矿工艺指标的影响,对上述三选厂原矿、精矿、尾矿样品进行了工艺矿物学研究,证实了钒钛磁铁矿中钛磁铁矿性质的变化对铁精矿质量的影响。      

新疆某超贫钒钛磁铁矿综合开发利用方案探讨

疆内铁精粉产量供不应求,钒、钛产业政策及市场需求前景可观,综合利用钒钛磁铁矿资源尤为重要.该矿通过合理选择工业指标、采矿方式、选矿工艺等方式,对铁、钛进行综合开发利用,不但提高了自有钢厂铁原料的自给率,保障铁原料稳定供应;还给矿山企业带来了较好的经济效益.     

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。