湖南某铀矿退役矿坑水的治理

介绍了湖南某铀矿开采过程中对地下水的影响状况 ;着重论述了矿山退役中矿坑水治理的原则 ,治理方法和科研工作 ;概述了矿坑水的封堵技术、施工管理 ,以及治理后所达到的效果。     

某铀矿山退役治理后的环境效益分析

铀矿山退役治理是一项庞大复杂的系统工程,铀矿山退役治理后的效益分析包括自然环境和生态环境效益分析。由于铀矿山区域环境特殊,退役治理的内容和标准有别与其它类别的矿山,所以选择的指标有一定的特殊性。本文采取层次分析法(AHP)确立各项指标的权重,以污染物的去除率作为治理的效益,各种污染物的去除率乘以其对应的权重作为总效益。以某铀矿山为例,通过分析认为此铀矿冶退役治理效益较好。     

退役铀矿山矿坑水治理方法的分析

归纳了我国退役铀矿山矿坑水治理的特点 ,对目前退役铀矿山矿坑水治理的方法进行了总结、分类 ,结合郴州铀矿退役矿坑水治理工程实例 ,提出了做好退役铀矿山矿坑水治理工作的建议。     

铀矿山退役治理效益指标体系构建研究

铀矿山退役治理是一项庞大复杂的系统工程,铀矿山退役治理后的效益分析包括经济效益、社会效益和环境效益分析。建立了铀矿山退役治理效益指标体系,提出了铀矿山退役治理效益的数学模型。     

铀矿山退役治理效益指标体系构建研究

铀矿山退役治理是一项庞大复杂的系统工程,铀矿山退役治理后的效益分析包括经济效益、社会效益和环境效益分析。建立了铀矿山退役治理效益指标体系,提出了铀矿山退役治理效益的数学模型。     

铀矿山废石场边坡稳定化设计

结合湖南某2个退役铀矿山废石场边坡设计实例,简要介绍了废石场治理工程中有关边坡稳定化设计方法,加固措施,防、排洪措施等技术问题。     

某铀矿尾矿区周边土壤环境质量评价

进行铀矿尾矿区周边土壤环境质量评价可为铀矿尾矿区治理和污染土壤修复提供科学依据。以我国某铀矿尾矿区为研究对象,在采样监测的基础上,应用内梅罗(N.L.Nemerow)模型,以Cd、Pb、Ni、Zn、Cu、Cr等6种重金属作为评价因子,对铀矿尾矿周边土壤进行了环境质量评价。结果表明,该铀矿尾矿区周边土壤中Cd严重超标,整体尾矿区周边土壤环境质量已超过警戒级的水平,受到了重金属污染,但铀尾矿库对周边土壤基本上没有造成污染。     

国内外2个铀矿山退役治理效果的比较研究

以国内某铀矿山和德国Ronneburg铀矿山的退役治理为研究对象,对其在废石堆治理、矿井封闭和废水处理3个方面进行了退役治理方式和治理效果的比较分析。分析结果表明:在治理标准和治理方式上2个矿山基本一致,但德国Ronneburg铀矿山在源项调查、废水处理和长期监护方面比我国某铀矿山做得更为详尽,更好地确保治理工程的长期有效性。     

雅安某废弃铅锌矿及周边区域土壤和地下水环境风险分析

为探究某废弃铅锌矿山及周边区域土壤和地下水的环境风险。以矿山历史开采区内及周边土壤、矿山上下游地下水中的砷、汞、镍、镉、铬、铜、铅、锌重金属为研究对象,采用单因子污染指数法及潜在生态风险评价等方法对重金属含量进行评价。结果表明,土壤受到明显污染,砷、镉、铅、锌污染较严重,主要超标原因可能为矿山开采过程中历史上环境措施不到位,且区域本底值较高。地下水含量未超标。废弃矿山生态风险存在,建议废弃矿山应尽快进行治理修复,地下水应做好长期监测。为废弃矿山后续的治理修复提供理论依据。     

硬岩铀矿山退役治理项目前期工作若干问题的探讨

通过4个具体实例分析,总结和探讨了硬岩铀矿山退役治理项目前期技术工作中的历史资料收集与分析、治理工程相关岩土勘察、场址渗水以及总体方案设计等问题,提出了相应的对策和建议,为硬岩铀矿山退役治理项目前期工作提供参考。     

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     

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     

2014 second batch of rare earth quota released

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China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.