永明煤矿选煤厂粗煤泥回收工艺技术改造

针对陕西永明煤矿选煤厂原粗煤泥回收工艺中存在的问题,对煤样进行了小筛分与小浮沉试验,基于煤质分析探讨了粗煤泥难浮选的原因,最终确定采用"浓缩分级旋流器+三质体复合高频脱水筛"的粗煤泥回收工艺,有效解决了永明煤矿选煤厂易泥化、难浮选粗煤泥的回收问题。在降低精煤灰分的同时提高了精煤产率,并取得了可观的经济效益。     

酸刺沟选煤厂粗煤泥分选系统技术改造的研究与探讨

针对酸刺沟选煤厂粗煤泥没有进行分选而直接脱水脱泥、产品发热量低以及销售价格低的问题,基于选煤厂现有工艺对粗煤泥分选系统进行技术改造,确保产品的发热量和经济效益。通过对比分析TCS智能粗煤泥分选机与螺旋分选机、TBS干扰床分选机各自的优缺点并结合选煤厂的煤质资料,确定选用TCS智能粗煤泥分选机进行改造。新增TCS粗煤泥分选系统,分选后将粗精煤产品掺入末原煤,与现有系统相比,经济效益有显著的提高。     

众泰煤焦化选煤厂脱水系统改造

介绍了拜城县众泰煤焦化180万t选煤厂脱水系统存在的工艺与设备问题,分析了进行脱水系统改造的必要性和可行性。通过改造,粗精煤泥脱水设备由浓缩分级旋流器+煤泥回收筛改为浓缩分级旋流器组+振动弧形筛+煤泥离心机,即控制了分级粒度,保证浮选入料粒度上限,同时利用煤泥离心机进行把关,保证了粗精煤泥水分。通过对煤泥水系统的工艺改造,加大了脱水系统设备处理能力,降低了最终产品水分。     

适用于粗精煤泥的脱水设备工艺效果的评定

鉴于炼焦煤选煤厂的粗精煤泥脱水设备有其特殊的脱泥降灰工艺要求,对适用于粗精煤泥脱水的工艺效果评定指标进行探讨,提出用脱水产物细泥脱除率和粗粒回收率两项指标来取代脱水产物固体产率,并用实例说明其可行性。     

太原选煤厂煤泥脱水工艺改造

根据太原选煤厂生产工艺的特点和现场的实际情况,对该厂的粗煤泥(精煤)、浮精和尾矿煤泥3个环节的脱水工艺进行了改造。粗煤泥脱水采用先进的煤泥旋流器,同时改变了脱水筛的入料方式;浮精脱水运用快开式隔膜压滤机,进行了整个工艺系统的改造;尾矿煤泥在脱水筛前,用煤泥旋流器进行了预先分级浓缩,提高了脱水筛的入料浓度。通过煤泥脱水环节的改造,使精煤和尾矿煤泥的水分降低,提高了产品质量,赢得了市场,取得了较好的经济效益。     

一种新型高效的TBS配套脱水工艺

为了解决粗煤泥预脱水和隔粗环节工艺系统复杂,运营成本高,"跑粗"严重,产品水分不稳定等问题,东曲选煤厂结合自身分选工艺特点,采用电磁式高频振动筛处理TBS溢流,筛上物料直接进入煤泥离心脱水机脱水的新工艺,简化了TBS配套脱水系统的工艺,降低了系统的设备量及投资量,工艺和经济效果显著。     

大屯选煤厂中矸粗煤泥脱水系统技术改造实践

分析了大屯选煤厂将跳汰生产工艺改造成全重介生产工艺之后中矸粗煤泥脱水系统存在的问题,通过详细分析,提出了中矸粗煤泥脱水系统生产新工艺,并对新工艺可能产生的经济效益进行了预测。生产实践表明,中矸粗煤泥脱水系统的改造取得了显著的经济效益。     

CSS-3.0型粗煤泥分选机在公乌素选煤厂的应用

为减少公乌素选煤厂的粗精煤损失,采用CSS-3.0型粗煤泥分选机对粗煤泥进行分选。介绍了该分选机的结构、工作原理、技术特点、技术参数,并分析了其在公乌素选煤厂的应用情况。CSS-3.0型粗煤泥分选机投入使用后,该厂精煤产率提高0.3个百分点,且灰分满足产品质量要求;粗精煤与浮选精矿混合后由加压过滤机脱水,有效改善了浮选精矿单独过滤脱水时效果差的问题。     

孔庄选煤厂粗煤泥脱泥系统技术改造

为解决孔庄选煤厂振动弧形筛脱泥脱水效果差引起的粗精煤泥灰分高、水分高的问题,在对粗煤泥脱泥脱水工艺比选的基础上,结合工艺流程、系统可靠性、投资费用、运行成本等因素,确定改造方案。生产实践表明:脱泥系统技术改造后,粗精煤泥灰分下降11.92个百分点,中煤中精煤含量下降18个百分点以上,综合精煤产率提高3.79个百分点,经济效益显著。     

粗煤泥分选工艺的探讨

针对孙村煤矿选煤厂粗煤泥分选工艺存在的问题,通过对煤样进行分析及试验研究,提出了相对合理的分选工艺,为该选煤厂粗煤泥回收工艺改造提供了技术方案,同时,也为选煤厂工艺设计提供了参考。     

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     

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