动筛跳汰机动态排料控制的研究

ROMJIG 2 0 5 0 0 80 8型动筛跳汰机在原煤的粗加工过程中处理量大 ,自动化程度高 ,特别是对分层物料的动态排料控制 ,对稳定床层分选密度分界线起关键作用 ,提高了设备的生产效率及分选指标     

动筛跳汰机及其应用

动筛跳汰机是近年来研制的用于分选25(13)~400mm粒级原煤的块煤分选设备,按驱动装置分为液压驱动式和机械驱动式两大类,处理量为50~350t/h,是目前国内选煤行业的最新产品之一。笔者认为,该设备在今后的煤炭洗选加工中具有广阔的应用和推广前景。     

摇床分选原理新见解

摇床是使用最多的细粒重选设备,进一步提高其分选效率,在生产上有重要意义。本文运用流体力学有关理论,结合拜格诺剪切理论,研究了矿粒在摇床上的分选行为。结果表明,矿拉群在摇床上的松散是周期性的,床面前进时,剪切分散压最小,床层未松散。床面后退时,剪切分散压最大,床层充分松散。此外,摇床的冲程和冲次越大,摇动曲线越不时称,轻重矿粒的纵向速度差越大,摇床的分选效率越高。     

GDT14/2.5G型机构动筛跳汰机在应用中的改进

GDT14／2．5G型机构动筛跳汰机主要应用于50-350mm颗粒级煤炭的分选，去除块原煤中的矸石，提质降灰。该机具有单位处理量大、分选精度高、循环用水量少、系统简单、上料大、生产成本低等特点。其主要工作原理为：筛体在驱动设备的带动下，绕固定销作上下往复运动，物料在筛板上经跳汰分选后，按密度大小分层，处于上层的煤，从溢流堰的上面流到提升轮的一个隔中，下层的矸石，     

TDY液压动筛跳汰机在杏花选煤厂应用

介绍TDY液压动筛跳汰机的特点及在杏花选煤厂分选块煤和矸石中的成功应用,已带来了较好的分选精度和经济效益。     

TD16/3.2动筛跳汰机研制与应用

介绍了TD16／3．2动筛跳汰机的结构特征、工作原理、技术参数、工业性试验及使用情况。试验结果表明，该机运行平稳可靠，操作调整方便，适应性强；分选300～25mm粒级的块原煤，处理量平均为171．6t／h，Ep＝0．07，I＝0．078，数量效率98．30％。该设备是目前国内处理量最大、入选粒度范围最宽的动筛跳汰机。     

动筛跳汰机在汾西矿业集团选煤中的应用

针对山西汾西矿业(集团)有限责任公司所属煤矿的原煤大块矸石多、煤质不易保证等问题,在坑口和选煤厂采用动筛跳汰机进行块煤排矸处理.对比几种动筛跳汰机的实际使用效果,针对该公司煤质条件对动筛跳汰机进行研究改进,提高了煤质,减轻后续选煤压力并降低了成本,取得了理想的分选效果.     

常村煤矿井下煤矸石分选工艺设计

常村煤矿毛煤中大块矸石含量较大,为了节约矸石提升及地面处理成本,提高煤炭有效运量,开展了井下煤矸石分选工艺设计。分析了煤质,提出了大块煤动筛跳汰分选+煤泥沉淀压滤的分选工艺,开展了主要工艺设备选型。该工艺具有可行性,有利于提高常村煤矿的经济效益和社会效益。     

高效机械式动筛跳汰机的研究及应用

论文分析了提高机械式动筛跳汰机分选效率的途径,从动力急回度、双源动力驱动、蓄能器设计与智能控制系统四方面入手,研究了机械式动筛跳汰机技术及工艺参数,并将高效新型机械动筛应用到工业实践。JLT1.6/3.2G型高效机械式动筛跳汰机在陕西金万通选煤厂的工业应用表明:原煤入料粒度50~200mm,分选密度达1.955g/cm3,洗选不完善度I=0.080,数量效率η=96.96%。与常规机械式动筛跳汰机相比,其工艺指标先进,且对煤质变化适应能力较强,分选指标稳定。     

南屯煤矿选煤厂动筛系统改造实践

针对南屯煤矿选煤厂动筛系统存在的洗水混乱、排料不稳定及液面难于控制等问题,从设备与工艺系统等方面出发,对动筛系统进行了技术改造。通过改造煤泥水管道,加设液压控制闸板及床层液位检测装置,实现了动筛系统洗水内部循环与排料、液位的自动控制,从而保证了生产的稳定。     

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     

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     

2014 second batch of rare earth quota released

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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