铁精粉尾矿干排技术的发展现状及应用

对近几年国内外尾矿干排技术进行了综述性的研究,分析了尾矿干排的优点,总结了国内外尾矿干排技术的发展现状;论述了国内几种尾矿干排技术的脱水工艺,对尾矿干排所使用的新型设备及其性能特征进行了介绍;简述了部分尾矿干排的应用现状,分析了尾矿干排目前存在的问题,预测并展望了尾矿干排技术的应用前景。     

干排技术在选矿企业安全生产中的应用

结合尾矿干排干堆工艺特点,在铁矿选矿企业实施了尾矿干排工艺系统工程,分析了影响尾矿干堆体稳定性的主要因素,提出了监测与管理尾矿干堆库的建议和方法,实践表明:尾矿干排技术具有安全可靠性高,实用性强和经济效益好的特点,应用前景广阔。     

尾矿干排与传统湿排工艺的安全经济性对比分析

介绍了尾矿干排技术,通过对尾矿传统湿排工艺和尾矿干排工艺在安全性与经济性的对比分析,并通过典型案例的应用情况,探讨了尾矿干堆技术在安全、经济效益方面的优势,提出尾矿干堆技术在尾矿处理方面的应用前景。     

宁城宏大矿业公司尾矿干排工程设计与实践

宁城宏大矿业公司年产生尾矿约1 300万t,按照排放情况计算,尾矿库服务年限仅为2 a,无法满足企业可持续发展的需求。为此,经过技术经济比较,最终选定尾矿干排方案。尾矿入旋流器分级,旋流器底流入脱水筛中脱水,筛上产物为干尾矿;旋流器溢流自流入尾矿库内。尾矿干排工程建成后,年处理尾矿1 300万t,满足现有选矿厂生产能力,尾矿库服务年限增加至10a,有效地解决了尾矿排放难题,为类似矿山尾矿处置开辟了新途径。     

新型尾矿干排工艺在丰宁万隆萤石矿业的应用

丰宁万隆萤石矿业为了解决尾矿库运行至后期出现的库容不足、选厂尾矿无处可排的问题,通过对尾矿干排工艺的研究,结合矿业自身实际情况,提出并实施了符合该矿的新型尾矿干排工艺。尾矿经干排工艺处理后,部分进行地表塌陷坑治理,部分进行井下采空区充填,既减少了尾矿排放占用的土地,又使尾矿得到二次利用,符合绿色萤石矿山建设要求。尾矿干排工艺中班德过滤器设备的使用,对萤石细粒级尾矿的沉降具有较好的适应性;高效脱水筛和节能型陶瓷柱塞泵的应用,体现出尾矿干排工艺的节能和高效。     

尾矿干排工艺与设备优化设计研究Research into optimization design of process and equipment for dry discharge of tailings 曾爱民 涂晓琴 吴泽洲

托库孜巴依金矿尾矿库投入运行已10多年,现有库容无法满足二期扩建的生产需要,因此将尾矿库改扩建为干堆场,从而将尾矿湿排工艺优化为干排工艺。本文开展了尾矿干排工艺与设备的优化设计研究,介绍如何根据尾矿浆物料粒径分布特征选择不同的尾矿干排工艺,并展示了干排工艺用设备的优化设计成果。该研究对提高尾矿干排处理效率、降低运行成本、提高回水利用率具有重要的实际意义。     

某铅锌萤石矿选别尾矿干排浓缩方案的改进

云南某铅锌萤石矿选厂尾矿采用干排干堆处理,原流程浓缩工艺存在着浓缩机底流浓度偏低、絮凝效果差、絮凝剂用量大的问题。在分析尾矿粒度的基础上,对浓缩机位置、加药方案、入料方式等进行技术改进。最终通过调换深锥浓缩机和高效浓缩机位置,在一级浓缩靠近稳流筒的位置添加絮凝剂,入料管更换为DN200等措施,保证了30%以上的底流浓度,药剂用量降低280 g/t,改善了絮凝效果,达到了尾矿干排的目的,提高了企业的经济效益,可为同类尾矿干排的技术改造提供参考。     

水厂铁矿尾矿干排工艺技术创新与应用

水厂铁矿尾矿处理工艺系统落后,受季节因素、尾矿库使用年限制约,严重影响生产正常运行。为减少尾矿入库量,延长尾矿库使用年限,通过对国内众多矿山尾矿干排工艺考察分析,结合水厂铁矿生产实际,提出尾矿干排工艺改造,对尾矿干排工艺设计进行创新研究,采用"旋流器+直线筛"尾砂干排技术,依托地形特点,创造性实施了阶梯式分散布置方式,打破了集中布置、皮带传送的常规生产线设计模式,大幅度提高干排砂存储空间,冬季也能正常生产,减少了工程投资和生产运营成本。项目实施后,生产干排砂物料用于采坑回填和土地整备治理等综合应用,从源头节约资源,降低污染,推动尾矿资源综合利用的发展,保护矿山环境,建设绿色矿山。     

拉么锌矿尾矿处理方案研究

拉么锌矿选矿厂尾矿采用低浓度排放方式,面临能耗较高、外排废水量大、重金属离子超标、枯水期选厂生产用水紧张等问题,详细分析了拉么锌矿选矿厂尾矿处理现状。通过尾矿性质分析,得出尾矿成分、含量及尾矿以中细粒为主;借助尾矿沉降试验,测出尾矿浆达到良好沉降效果时絮凝剂的添加量;研究出了膏体制备的工艺流程及浓缩指标。同时对高浓度尾矿料浆进行塌落度试验及环管输送试验,对尾矿浆输送浓度、体积和速度进行测算,最终得出了合理的输送方案。制定了一套适合拉么锌矿选矿厂尾矿处理的方案,即尾矿料浆浓度为70%的膏体尾矿运排方案。该方案具有使生产用水循环利用,尾矿入库干堆排放、外排废水量少等优点,解决了当前拉么锌矿选矿厂尾矿处理面临的问题。     

武钢金山店铁矿尾矿干堆技术方案比选

针对武钢金山店铁矿尾矿库建设存在的征地多、投资大、工期长且难以满足绿色矿山建设和环保要求等问题,提出了尾矿干堆的新型技术方案。现有的尾矿干堆技术方案有尾矿脱水干堆、尾矿固化干堆和尾矿固结干堆等3类,通过技术、工程、设备与经济综合比选,采用工艺简单、设备较少、能耗较低、管理方便的尾矿固化干堆方案,该方案有助于解决武钢金山店铁矿尾矿安全处置问题,可为类似矿山提供参考。     

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。