鹿鸣钼矿选矿废水循环利用工艺研究与应用

选矿废水的完全回用是建设绿色矿山和资源高效利用的必然要求。为考察鹿鸣钼矿选矿废水循环利用的可行性,基于废水水质分析结果,在实验室进行了选矿废水直接回用的探索试验及系统的药剂制度优化试验,并通过工业试验进行了验证。结果表明,在现有选矿工艺制度下,选矿废水直接回用会明显降低铜、钼精矿品位,无法满足生产要求。通过优化铜钼混浮作业、铜钼分离作业和钼尾选铜作业的浮选药剂制度,调整选矿废水循环利用的生产工艺流程,经过工业试验验证,最终获得了钼回收率88.13%、铜回收率35.29%的良好指标,使综合经济效益有所提升,为同类型钼矿选厂选矿废水循环利用提供了借鉴。     

某铅锌混合矿选矿废水分段回用研究与应用

选矿废水经处理后回用成本高,若能在未进入废水处理站之前直接回用一部分,对降低废水处理成本、提高企业经济效益和减少对环境的影响具有重要意义。通过对某选矿厂各浮选作业点产出的选矿废水进行研究,采取分段直接回用的措施,充分回用部分废水,既保障选矿回收率不受影响,又减少产出最终废水量,降低废水处理成本,经济效益和环境效益显著。     

某铅锌选矿厂废水处理工艺探讨

通过处理废水的不同试验方法对比,对河南某铅锌选矿厂的废水进行了处理试验研究,最终提出了两种方案:其一先经过铅锌矿反浮选,再回用到选矿过程中的处理工艺,实现了废水的零排放,提高了经济效益和社会效益;第二采用改性后的煤渣进行废水的处理,并且得出在含油废水处理中也有较好效果.     

某铅锌矿选矿废水成分及其与COD关系探讨

介绍了某铅锌矿选矿废水的基本情况。通过测定各选矿废水的COD及TOC, 分析了选矿废水成分与COD的关系。研究结果表明, 为了从源头上控制选矿废水的COD, 宜对选矿药剂进行筛选, 尽量选择对COD贡献小以及易降解的选矿药剂。     

铜矿选矿废水处理研究现状与展望

铜矿选矿过程产生的废水含有的污染物多,导致周边环境严重污染。随着我国水资源的短缺及环保要求的日益严格,对废水的处理是亟需解决的问题。本文以铜矿选矿废水为研究对象,分析了其来源、基本特征以及对环境的危害性,针对铜矿选矿废水中的固体悬浮物、重金属离子和有机选矿药剂,分别阐述了自然沉降、吸附、絮凝、化学沉淀以及高级氧化等处理方法,并对各种方法的机理及优缺点进行总结分析。探讨了铜矿选矿废水在处理中存在的问题,对废水的治理研究进行展望,应开发高效且生态友好的废水处理新工艺,降低废水对环境的污染,实现废水的高效治理。     

新疆某选厂选矿废水处理及回用试验研究

研究了新疆某选厂选矿废水的处理方法,并对处理后的废水进行了选矿验证试验。确定采用"化学氧化还原法+中和沉淀法+活性炭吸附法"联合处理选矿废水。结果表明,当初始废水pH值在2左右,FeSO4·7H2O投加量为理论值,石灰乳调节溶液pH值于7～8,活性炭的投加量为0.3g/L时,废水中重金属以及COD的去除率最高。处理后的选矿废水中Cr、Cu、Pb以及COD的含量均低于国家污水排放标准,选矿验证试验结果表明,处理后的废水可循环利用。     

铜硫矿选矿废水对浮选的影响及处理现状?

针对铜硫矿选矿废水的特点,介绍了废水回用对铜硫浮选产生的影响,并对铜硫矿选矿废水的处理方法进行了综述。     

我国选矿废水回用处理方法研究进展

由于选矿废水排放量大,且其中含有大量重金属离子、选矿药剂和悬浮物,任意排放不仅对环境污染严重,而且会造成水资源大量浪费。因此,选矿废水的综合处理与回用具有巨大的研究价值和实践需求。概述了选矿废水可能对选矿过程造成的影响,比较了国内外选矿废水回用处理的差距,总结了国内选矿废水回用前常用的处理方法,分析了选矿废水处理回用在选矿废水综合治理方面的巨大优势,并提出了发展选矿废水综合回收利用的几点建议。     

厂坝铅锌矿选矿废水综合治理

通过对厂坝铅锌矿选矿生产用水情况的初步调查分析 ,提出减少废水排放、最终达到不排废水的治理改造方案。     

选矿废水的净化处理技术及机理研究进展

选矿废水是矿山环境污染的主要来源之一,废水中残留的浮选药剂大多都是难降解的有机化合物,这些化合物通常都具有较强的生物毒性且不易自然降解,如果直接排放到自然环境中,将会对环境和水体造成严重的污染,而经过有效处理后,可达到废水排放标准,还可回用到选矿过程中。本文从选矿废水的具体来源、特点以及危害展开深入探析,综述了物理处理法、化学处理法和生物处理法中常见的废水处理方法及其机理,主要有物理吸附法、过滤法、好氧-厌氧降解、Fenton氧化和过硫酸盐高级氧化法等。并对选矿废水中的难降解有机化合物的处理所取得的成绩和其中的不足进行了总结,展望今后选矿废水处理技术的研究发展方向,开发和应用经济、高效和绿色的选矿废水处理技术,是减轻选矿废水对环境的污染,保护环境,实现对选矿废水低成本有效治理的关键。      

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     

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     

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.     

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.     

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