泥浆中固相含量的控制和效果

目前煤田钻探中主要使用旋流除砂器,其分离固体颗粒直径一般在74μm以上,也可分离部分40-74μm的颗粒。采用不分散低固相聚合物泥浆,必须配合机械除砂设备,以保证泥浆的固相含量。     

腐殖酸钾—KF—1聚合物低固相泥浆在豫东地层的应用

介绍了腐殖酸钾-KF-1聚合物低固相泥浆在豫东地区厚覆盖层基岩破碎带的使用情况,及该泥浆的配制方法和机理分析.     

GK-15型地质岩心钻探泥浆固控装置研究应用

固相控制装置在石油钻井中应用比较广泛,已实现系列化、标准化和专用化。地质岩心钻探在深度、口径和工艺等方面不同于石油钻井。因此,石油钻井固相控制装置不适合在地质岩心钻探施工中使用。GK-15型地质岩心钻探泥浆固相控制装置是在综合石油钻井固相控制装置特点的基础上,结合地质岩心钻探工艺的需求,把振动筛、清洁器和离心机通过管路联接,构成封闭的泥浆固相控制装置,实现泥浆的制备、循环、固相控制和储备。介绍了GK-15型泥浆固相控制装置结构、性能参数以及取得的使用效果。     

泥浆固相控制系统在水平定向钻穿越施工中的使用

国内定向钻发展非常迅速，大量穿越废泥浆的处理日益引人关注，在市场发展和环保要求的作用下，穿越泥浆的固相分离与再利用是水平定向钻泥浆发展的必然趋势，文章叙述了国内水平定向钻穿越泥浆固相控制原理和方法、固相控制的现状以及固相控制系统的发展趋势。     

岩心钻探中泥浆净化除砂器的研究与应用

在分析了岩心钻探所用泥浆中的固相及固相含量过高对岩心钻探诸多方面的不利影响的基础上,对比了降低固相含量的各种方法。介绍了自行研制的XZ系列泥浆净化除砂器的组成、结构参数以及使用情况,并对该泥浆净化器在岩心钻探中的合理使用提出了相关建议。     

无固相聚合物体系泥浆在艾哈代布油田ADRu3-3-2H井应用

目前伊拉克AHDEB油田钻井采用的钻井液为磺化聚合物钻井液体系,在钻井过程中,钻井液滤液、钻井液固相等可能对压力系数日趋下降的油层造成损害。针对目前采取的钻井液体系现状,关于储层保护技术问题,四开储层准备采取无固相聚合物钻井液体系,进行储层专打,利用降低钻井液固相堵塞储层孔道几率而减少储层伤害。在进行多次室内配伍实验后,该无固相聚合物体系泥浆成功应用于ADRu3-3-2H井四开水平段井眼。     

地下连续墙施工中低固相不分散聚合物稳定液的应用

针对上海外滩金融中心基坑围护工程地下连续墙施工中地层及环境情况，在分析传统的膨润土-NaCMC泥浆体系存在缺点的基础上，研制了新型的低固相不分散聚合物稳定液。     

低固相不分散泥浆在复杂地层钻进中的应用

介绍低固相不分散泥浆的制备及采用低固相不分散泥浆护壁、金刚石取芯钻进工艺。     

无固相泥浆在曹县煤田青岗集勘查区中的应用

针对煤田勘查过程中地层埋藏较深、松散层厚度大等原因极易造成卡钻、埋钻等孔内事故,在曹县煤田青岗集勘查区项目施工中经反复试验引入了无固相泥浆,结合勘查区巨厚松散层等地层特征分析无固相泥浆应用的效果,以期对相同地层条件下的地质勘查工作提供参考,避免出现孔内事故。     

嵩县槐树坪大型金矿复杂地层泥浆及护壁堵漏技术

嵩县槐树坪金矿区域地质构造复杂,岩石破碎,部分岩层高岭土化,钻探施工中漏失、垮塌严重,经常发生钻孔缩径、卡钻、内管总成打捞困难等孔内事故,严重影响了钻进效率和钻孔质量。对该矿区施工所遇到的困难和需要重点解决的问题进行了分析,通过试验研究,确定采用聚合物低固相泥浆体系,并根据该矿区地层特点,确定了在不同条件下聚合物低固相泥浆的配方、配制方法、维护管理及护壁堵漏方法等,逐步在该矿区全面推广,大幅度减少了孔内事故、提高了纯钻效率和台月效率,有效地促进了该矿区的勘探进度,缩短了勘探周期,取得了显著的经济效益和社会效益。     

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     

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