污染场地环境水文地质勘察技术的应用探讨

为避免变迁后的污染场地对人类健康和环境带来危害,减少不必要的经济损失,需要对场地的环境状况进行评价,为此需要开展专项场地环境水文地质勘察工作.该文结合目前国内颁布的北京市地方标准"场地环境评价导则(DB11/T 656-2009)"对采样分析阶段的相关规定,以北京市某污染场地为例,首次系统地总结和探讨了污染场地环境水文...     

如何实现煤炭工业的可持续发展

从树立新观念,制定煤炭工业可持续发展战略;建立环境与发展综合决策机制;合理开发和利用煤炭资源;依靠科技进步,发展洁净煤技术;搞好矿区土地复垦及污染治理等几个方面,论述了如何实施煤炭工业可持续发展.     

我国砒霜厂场地污染现状及其治理研究进展

砒霜厂是我国一类典型的重金属复合污染场地。介绍了国内砒霜厂遗留场地的形成背景和污染现状，对物理阻隔、固化/稳定化、生态修复三类主要治理技术的基本原理和特点进行了综述，并重点阐述了固化/稳定化材料的种类及其应用现状，总结了砒霜厂污染场地治理的典型工程案例，分析与展望了砒霜厂污染场地治理技术的发展方向，旨在为砒霜厂污染场地的修复和管理提供参考。     

高密度电阻率法在湖南某铬污染场地调查中的应用

电阻率法是识别场地重金属污染的有效技术方法。该文以湖南某铬污染场地为例,介绍了采用高密度电阻率法调查污染区分布情况。综合对比分析电阻率与钻孔地层、水位及地下水样六价铬浓度关系,得出影响该场地地层电阻率最主要的因素,为地下水中六价铬的浓度。根据高密度电法测线反演结果,推断了场地铬污染的分布范围和深度,为场地的修复治理提供了依据,也为地球物理方法在污染场地调查中的应用提供了借鉴。     

深部条带采空区稳定性评价及地表利用分析

针对条带采空区在大埋深条件下的稳定性问题,以开采条件、稳定性地表变形、煤柱稳定性等判别因素,对岱庄煤矿采空区进行了稳定性评价。为保障场地安全及以后的建设使用,以场地稳定性及工程重要程度判别、工程类比法、采空区特征及活化影响因素分析法、地表剩余移动变形判别法等方法进行采空区场地对工程建设的影响评价,来评价场地建设利用的适宜性;适应建设规划的采空区治理标准和处理方法,有利于整体的沉陷治理和建设再利用过程。     

污染土地基岩土工程勘察实例

本文通过安阳市染料助剂厂搬迁场地污染土的勘察,对污染土的工程性质作了介绍与分析;对车间废水的腐蚀性及场地土的变化趋势作了评价和预测;同时,根据场地条件和建筑物的型式,对基础类型的选择、污染土地基处理及防护措施提出了具体建议。     

畜禽养殖的污染现状及防治对策

造成畜禽养殖污染的原因是多方面的,带来的环境污染问题也受到了人们的广泛关注。根据我国畜禽养殖污染的特点和防治现状,分析了畜禽养殖污染防治所存在的问题及影响因素,提出应当高度重视农村畜禽养殖污染的整治,加强宣传教育和舆论引导,严格规划,合理布局,完善污染物处理设施配套建设,强化部门工作职责,建立长效管理机制,采取有效的治理措施,积极防治畜禽养殖污染。     

污染场地土壤环境现状调查与修复

开展污染场地调查工作时,应当及时针对污染场地开展采样分析工作,在合理布设采样点的基础上选择适合的采样方法,实现合理分配目标。采样工作科学性高低直接影响着污染场地土壤环境调查质量,同时也会对后续修复措施提出产生影响。因此在开展污染场地土壤环境现状调查时,需要保持科学严谨的态度,做好采样工作,为后续调查工作开展提供支持。     

西昌泥石流调查报告

不良的地质、地貌、水源等自然因素，及人类不合理的经济活动是西昌附近泥石流沟的成因，全面规划、建立良好的生态环境，与经济的合理开发相结合是泥石流灾害治理的根本，黑沙河的规划治理就是比较成功的例子。     

如何实现煤炭工业的可持续发展

从树立新观念，制定煤炭工业可持续发展战略；建立环境与发展综合决策机制；合理开发和利用煤炭资源，依靠科技进步，发展洁净煤技术；搞好矿区土地复垦及污染治理等几个方面，论述了如何实施煤炭工业可持续发展。     

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。