关国Highland铀矿碱法地浸采铀工艺

Highland铀矿是西方国家最大的铀地浸矿山之一，采用典型的美国碱法地浸工艺，即以CO2和O2配制溶浸剂进行浸出。介绍了Highland铀矿采用的井场设计与建设、环境评价与监测、生产操作和地下水复原等方法，以及Highland铀矿的地质概况。     

美国Highland铀矿碱法地浸采铀工艺

Highland铀矿是西方国家最大的铀地浸矿山之一,采用典型的美国碱法地浸工艺,即以CO2和O2配制溶浸剂进行浸出。介绍了Highland铀矿采用的井场设计与建设、环境评价与监测、生产操作和地下水复原等方法,以及Highland铀矿的地质概况。美国Highland铀矿碱法地浸采铀工艺     

美国Highland铀矿碱法地浸采铀工艺(续完)

Highiand铀矿是西方国家最大的铀地浸矿山之一，采用典型的美国碱法地浸工艺，即以CO2和O2配制溶浸剂进行浸出。介绍了Highland铀矿采用的井场设计与建设、环境评价与监测、生产操作和地下水复原等方法，以及Highland铀矿的地质概况。     

砂岩型铀矿碱性地浸过程孔隙结构演化特征

采用NaHCO₃+H₂O₂碱性溶浸液对铀矿柱状岩芯进行了柱浸实验，利用电镜扫描图像分析了砂岩型铀矿表面特征和孔隙分布状况，以核磁共振T₂谱定量表征碱性地浸过程中含铀砂岩微观孔隙结构变化。结果表明，溶浸液化学溶蚀作用下岩芯内部基质首先形成连通型孔隙，大、小孔间孔喉增加；反应生成的Al(OH)₃矿物胶体和CaCO₃集中沉淀堆积于小孔和微裂隙中，减小了溶浸液与基质有效接触反应面积，降低了铀矿浸出效率；97～158 h为溶蚀优势期，该阶段化学溶蚀量远大于沉淀堆积量，形成大量连通型孔隙，使铀矿物与溶浸液进一步反应溶解，铀矿采收率达到峰值。     

基于TOUGHREACT模拟分析黄铁矿对酸法地浸采铀的影响

酸法地浸采铀过程中,铀矿的伴生矿黄铁矿作为非目标矿物会消耗氧化剂和酸.为探明酸法浸铀过程中因黄铁矿溶解产生的变化规律,以巴彦乌拉铀矿采铀过程为例,采用六注二抽的"网格式"井型构建二维酸法地浸采铀模型进行模拟研究,在抽注平衡的条件下,模型中只考虑黄铁矿(FeS2)、沥青铀矿(UO2)与石英(SiO2).结果表明:1)10...     

松辽盆地可地浸砂岩型铀矿钻探施工技术

总结介绍了松辽盆地可地浸砂岩铀矿钻探的施工工艺，冲洗液配制及管理，可地浸砂岩铀矿钻探的目的层——松散砂体的取心技术和退心技术，钻探管材的使用及孔内事故的预防与处理。     

砂岩型铀矿地浸可行性概略评价及关键指标

针对砂岩型铀矿普查阶段地浸可行性概略评价的难题,本文从砂岩型铀矿和地浸采铀的基本概念出发,通过总结全球地浸采铀技术的实践和经验,认为普查阶段的地浸可行性概略研究应聚焦于矿床条件的勘查和评价,并将砂岩型铀矿与地浸开采有关的矿床条件划分为地质条件、水文地质条件和浸出工艺条件,提出矿床的渗透性和矿石的可浸性是决定矿床能否地浸开采的核心指标。其中,矿床渗透性是影响砂岩型铀矿可地浸开采的先决条件,决定着技术上是否具备地浸开采的可行性,矿石的可浸性是影响砂岩型铀矿可地浸开采的基本条件,决定着资源回收率能否达到一定指标,并且影响项目的经济性。研究结果表明,开展砂岩型铀矿的渗透性和可浸性评价,提出普查阶段地浸可行性概略评价的程序、方法以及关键技术参考评价指标,对于砂岩型铀矿床的勘查开发和地浸法技术的进步具有重要意义。     

基于层次分析法的砂岩型铀矿地质-水文地质条件评价研究

砂岩型铀矿适宜的地质-水文地质条件是决定地浸开采是否可行的重要条件之一。为了定量、客观地评价砂岩型铀矿的地质-水文地质条件,并评价其可浸性,构建了包含15个具体指标的砂岩型铀矿地浸地质-水文地质条件评价指标体系;并采用层次分析法构建判断矩阵,较客观地得出了各项评价指标的权重;同时建立了砂岩型铀矿地浸地质-水文地质条件评价分级标准,提出了综合评判值U的计算公式。以伊犁盆地Ⅰ、Ⅱ、Ⅲ矿床为例,开展了地浸地质-水文地质条件适宜度评价,评价结果与实际情况具有较好的一致性。     

低渗砂岩型铀矿液态CO2相变致裂增透高效开采新模式

安全稳定的铀资源供应,对于保障国家安全、促进核工业健康可持续发展具有重要的意义.针对我国低渗透性砂岩型铀矿在地浸开采中渗透性低、浸出困难的技术难题,提出了低渗砂岩型铀矿液态CO2相变致裂增透高效开采技术模式,即采用液态CO2相变致裂技术,在地浸采铀抽、注液孔之间产生大量的联通裂隙,提高低渗透铀矿的渗流能力.采用理论方法...     

地浸铀矿大功率超声波解堵增渗技术的应用研究

大功率超声波解堵增渗技术作为一种针对近井地带堵塞的新型环保解堵增渗技术已经应用在油水井解堵增产领域及煤矿瓦斯治理领域。而铀矿地浸矿山开采的近井地带堵塞与石油领域不同,一般具有埋深浅、地质较为疏松、井筒尺寸小的特点,所以大功率超声波技术应用在铀矿地浸矿山领域需要进行优化、改进及针对性分析。本文通过对大功率超声波在铀矿的传播特性制定合理的超声波参数,根据参数设计研发适用于铀矿地浸矿山的小型化、大功率超声波设备,并对该新型大功率超声波设备在铀矿地浸矿山进行试验与应用,分析大功率超声波技术对地浸矿山的影响,为下一步推广大功率超声波技术在铀矿地浸矿山领域的应用奠定基础。     

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     

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     

2014 second batch of rare earth quota released

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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