斜轮分选机的一项改进

<正> 斜轮分选机排矸轮漏矸问题是一个急需解决的问题。因为:(1)排矸轮与外壳之间30～40毫十的间隙因排矸轮漏矸而堵满了矸石,排矸轮不能转动,从而停产; (2)当排放这些漏歼时,因漏矸把介质桶上的篦子堵死,从而造成定压缸的液位     

新材料在提高斜轮分选机排矸轮使用寿命中的应用

介绍了采用16Mn和304L两种不锈钢材质加工的重介斜轮分选机排矸轮的同机对比使用试验结果,为采用新材质制作排矸轮,提高排矸轮使用寿命提供了新的思路和途径。     

同忻选煤厂洗选工艺优化升级

针对选煤厂在煤炭洗选加工过程中出现的原煤破碎机破碎能力不足、大块手选皮带溢煤停机、岗位工人数量不足、劳动强度较大、洗选设备磨损严重等一系列制约生产的问题,同忻选煤厂研究并实施了大块原煤预排矸工艺技术改造。在大块原煤预排矸工艺中,200～50mm粒级大块原煤进入重介浅槽分选机进行分选,50.0～1.0mm粒级末煤采用两段重介两产品旋流器主再选,1.00～0.25mm粒级粗煤泥采用TSS煤泥分选机进行分选,0.25～0mm粒级细煤泥采用加压过滤机和板框压滤机联合脱水回收。结果表明:块末分级入洗新工艺提升了选煤厂的生产能力,提高了洗选设备的开机率,降低了煤泥水系统的运行压力,同时降低了捡矸岗位工人员的劳动强度,保证了商品煤质量,提高了分选效率,并且创造了可观的经济效益和社会效益。     

新型无动力智能连续排矸提效的研究与应用

本文重点介绍了国家能源集团准格尔能源有限责任公司哈尔乌素露天煤矿选煤厂针对连续排矸系统的排矸工序繁琐、排矸时间长、排矸效率低、工人劳动强度大等问题,对现有连续排矸系统工艺和方式进行对比分析,通过优化排矸工艺,集成自动化集中控制,改进排矸设备等方式,形成了一种"扇形闸门+转载溜槽+自动智能控制+外排装车"新型无动力智能化...     

斜轮重介分选机排矸轮腐蚀磨损情况分析

<正> 斜轮重介分选机的主要部件——排矸轮易于腐蚀磨损。如厚10～12毫米的A_3钢板,使用到6～7个月局部磨漏,经过修补可延用到一年左右,全国大约有25～30个重介选煤厂,约有60～70台斜(立)轮分选机,若每台平均售价1.5万元,全国每年更换排矸轮的费用是相当大的。     

平朔安家岭选煤厂工艺优化及设施小改造的成果

针对平朔安家岭选煤厂排矸系统块中煤转载胶带输送机在实际运行中的问题,介绍了选煤厂排矸系统的工艺流程,分析了生产实践中影响系统稳定运行的常见障碍,通过简单、实用、合理化的改造,有效解决了溜槽、吸料口容易卡堵等问题。为选煤厂实现资源回收利用、稳定洗选加工系统,提升经济效益,减轻工人的劳动强度起到了良好的作用和效果。     

荆各庄矿块煤选矸车间技术改造方案的探讨

从原煤的适应性、选矸方法的效率、投资和运行费用的高低到现场日常管理的难易程度等方面,重点对动筛跳汰机和重介立轮分选机进行了分析比较,最终确定荆各庄矿块煤选矸车间技术改造采用动筛跳汰机选矸方案。     

针对LZX-2．0斜轮分选机跑水问题的改进措施

我矿选煤厂1985年安装了2台斜轮重介质分选机，负责选煤厂＋50mm原煤的入洗，1台LZX-2.0斜轮重介质分选机进行第一次分选，提升轮排出的沉淀物再进入1台LZX-1.6斜轮重介质分选机进行第二次分选。LZX-2．0斜轮分选机提升轮排出的沉淀物中携带一定量的悬浮液，导致分选槽中液化不稳，影响了斜轮的分选效果，针对斜轮跑水这一问题，我们采取了一定的改进措施。     

LZX-4型重介斜轮分选机在火石咀选煤厂的改造实践

为了解决火石咀选煤厂LZX-4重介斜轮分选机在生产运行中出现的一些问题,结合生产实际,对其进行了分析研究,并采取了一系列改造措施。实践表明,改造后的LZX-4重介斜轮分选机综合性能得到提高,主要部件使用寿命延长,维护费用降低,并且分选效果得到提高。     

模糊PID控制系统在鲍店选煤厂的应用

为提高鲍店选煤厂选矸车间斜轮重介系统的控制精度,采用模糊PID控制对斜轮重介悬浮液密度进行自动调节。对鲍店选煤厂模糊PID控制系统进行设计,并介绍了系统软硬件组成、工作原理、系统功能特点,分析了该系统在鲍店选煤厂的应用效果。实践表明,模糊PID控制系统在鲍店选煤厂选矸车间的应用,有效提高了精煤和矸石的分选精度,降低了介质消耗。     

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。