禾草沟选煤厂工艺流程设计探讨

通过分析禾草沟选煤厂入选原煤煤质特征及产品用途,介绍了禾草沟选煤厂的洗选方案、分选粒级和选煤方法,确定了300mm~13mm原煤通过重介浅槽预先排矸后破碎至-50 mm以下、对50mm~0.5mm不脱泥采用无压给料三产品重介质旋流器洗选、对0.5mm~0mm煤泥采用浮选、浓缩和压滤联合回收的工艺流程。     

海则滩选煤厂工艺流程设计探讨

通过分析海则滩选煤厂原煤煤质特征及产品用途,介绍了海则滩选煤厂设计过程中的分选粒级和选煤方法的选择依据,确定了80～13 mm块煤采用浅槽重介分选机分选,系统预留有13～6 mm的分选处理能力,<6 mm末煤暂不分选,同时预留末煤分选的可能性,煤泥采用压滤机回收的工艺流程。     

鲍店煤矿选煤厂生产系统的技术改造

根据鲍店煤矿选煤厂原有生产系统存在的跳汰分选效率低、煤泥未经分选等问题,采用了以下工艺对生产系统进行改造:50～0.75mm粒级原煤采用双供介重介质旋流器分选、0.75～0.25mm粒级原煤采用煤泥重介质旋流器分选、0.25mm煤泥采用浓缩压滤工艺回收,并介绍了技术改造所取得的良好效果。     

王家岭选煤厂全粒级分选工艺

王家岭选煤厂入洗原煤煤质属于瘦煤(SM),是宝贵的优质炼焦配煤,科学有效的分选工艺是精煤最大回收率和企业经济效益的保证,针对入洗原煤煤质,+50mm粒级块煤动筛跳汰机预排矸工程投资少、吨煤耗水量小于0.1m3,生产成本低;1~50mm粒级重介旋流器主再洗灵活可靠,吨煤介耗1kg,精煤回收率高;1~0.25mm粒级采用TBS干扰床分选机分选指标Ep值0.18,I值0.24,分选效果好;0.25~0mm粒级微泡浮选柱分选浮选精煤产出率保持70%以上,实践证明,该厂采用全粒级分选工艺,产品煤数质量指标优良,经济效益显著。     

四通选煤厂原煤预排矸工艺探讨

简要介绍了四通选煤厂原煤煤质和生产工艺流程;通过对三种预排矸设备的性能进行对比分析,确定选用重介浅槽分选机作为该厂原煤预排矸设备;并通过计算与分析,对预排矸工艺的分选粒度下限进行了确定。     

RC1800粗煤泥分选机的应用分析

RC1800粗煤泥分选机是从澳大利亚LUDOWICI引进的分选2mm～0.2mm粒级煤泥的分选设备,它有结构简单、自动化程度高、无运动部件,能耗低、维护量小等优点,它使选煤工艺更加合理,按粒级分选更加完善;充分解决了原煤中细粒煤泥含量高给选煤厂带来的影响,尤其是优化了重介选煤工艺的脱介、脱泥设备,降低了介质消耗。     

裕源矿选煤厂选煤方法及入洗方式的分析确定

分析了裕源矿选煤厂的煤质特点,对50～0 mm粒级原煤的选煤方法和原煤入洗方式以及-0.5 mm粒级煤泥的选煤方法进行了分析确定,得出结论:裕源矿选煤厂50～0 mm粒级原煤采用选前不脱泥无压三产品重介旋流器分选,-0.5 mm粒级粗煤泥采用煤泥重介分选,细煤泥采用浮选。     

姚桥原煤洗选方式与方案优化

姚桥选煤厂原采用50～8 mm粒级原煤三产品重介旋流器分选+煤泥水直接回收的联合工艺,给该厂的生产和产品储装运系统带来一系列问题,同时也影响了以主要洗选姚桥原煤的大屯选煤厂生产系统和产品质量。为此,该厂研究、设计了姚桥选煤厂不分级洗选、增加煤泥浮选的工艺。     

鹿台山矿原煤预排矸方案分析

为解决鹿台山矿井下生产的原煤矸石含量大、重介选煤效率低、洗选成本高等问题,对3种预排矸工艺性能进行对比分析,确定选用复合式干法分选机作为该厂原煤预排矸设备,并通过计算与分析,对预排矸工艺的分选粒度下限进行了确定。研究结果表明,该矿采用干法预排矸,可以排除80%以上的矸石量,降低运输和洗煤成本,降低设备磨损程度,增加企业经济效益。     

TQF3516型浅槽重介质分选机在李雅庄选煤厂的应用

针对李雅庄选煤厂原煤动筛跳汰排矸系统存在的生产问题,采用浅槽重介质分选机替代动筛跳汰机对原煤进行预排矸。介绍了TQF3516型浅槽重介质分选机的结构与工作原理、技术特点、主要技术参数,并分析了实际操作中的注意事项。该浅槽重介质分选机的应用,解决了群矿型选煤厂入选原煤煤质波动大引起的洗选产品质量不稳定难题,使生产系统更易于实现自动化,有效降低了洗选加工成本,为企业创造了一定经济效益。     

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     

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。