主井提升信号及自动定量装卸载综合控制系统在煤矿的应用

针对三矿主井提升无定量装载制约生产的现状,提出运用主井提升信号及自动定量装卸载综合控制系统。详细介绍定量装卸载系统的主要组成部分、工作原理及流程和系统功能等。通过实际应用,该系统解决了定量装载的问题,为自动定量装卸载综合控制系统在煤矿装载方面的推广应用提供了应用范例。     

煤矿主井装载电控系统改造

<正>兖州矿业(集团)公司兴隆庄煤矿主井提升系统配有2部引进提升机,与其配套的装载电控设备是建井时国产配套的。在使用了20年后,部分设备既落后又不符合《煤矿安全规程》的要求,因此对装载电控系统进行了数字化改造。     

主井自动化无人值守系统的实践

基于霍州煤电集团李雅庄煤矿主井提升系统存在的问题,提出了基于KJD10主井定量装载控制系统的全自动化改造实践应用,分析阐述了技术改造方案、核心技术和主要创新点。改造系统的应用效果良好,效益显著。     

煤矿主井信号与自动装载控制系统

采用可编程控制器等中控制模式,可与提升机电控系统进行接口配套,实现主井多水平的提升信号,与自动装卸载系统相互闭锁,可提高提升系统的安全性,实现主井提升自动化。重点介绍主井信号系统结构及特点,介绍装载系统工作方式。经安装调试结果,信号、装载系统均符合《煤矿安全规程》的规定,确保煤矿井下安全生产。     

城郊煤矿主通风机变频调速电控系统改造

介绍了城郊煤矿东风井主通风机变频调速电控系统改造的原因和实施方案,通过变频改造提高了主通风机的效率,达到了变速调节风量和节能的目的。     

安全在线监控在提升系统中的应用

龙口矿业集团北皂煤矿通过对绞车电控系统的数字化改造,提高了主井提升系统的安全性和可靠性,减少了故障诊断及处理时间,提高了主井设备的运转效率,加大了科技含量,保证了矿山的安全生产。     

基于PLC与WinCC的东滩煤矿主井装载系统改造

针对东滩煤矿原有的主井装载电控系统的软、硬件问题,采用S7-300PLC作为装载系统地面的主控,采用分布式I/O设备ET200M负责井底装载设备的现场数据采集与控制,主控PLC与ET200M之间通过PROFIBUS总线进行数据交换,并采用WinCC组态技术实现了将装载系统监控界面集成到提升系统的监控界面中。     

煤矿主井提升箕斗防超载保护关键技术研究与应用

煤矿主井提升箕斗超载运行是立井安全提升的一个重大安全隐患,为解决主井提升箕斗超载的问题,陈四楼煤矿在原有定量机的控制系统基础上,分别对定量机操作台急停保护、速度保护、箕斗冗煤保护关键技术进行了研究与设计,且在现场主井装载定量机场得到了实践应用。实践表明,其超载保护关键技术改造取得了良好的安全效益和经济效益,确保了主井提升箕斗安全提升的可靠性和稳定性,具有参考和借鉴推广意义。     

煤矿提升机电气控制系统的技术改造

概述了PLC技术的应用,明确了煤矿提升机电气控制系统的主要构成,并着眼于现行煤矿提升机电控系统存在的诸多问题,就基于PLC技术应用的煤矿提升机电控系统改造作出分析论述,意在为PLC技术在煤矿提升机电控系统中的实践应用提供借鉴与支持,促进煤矿提升机电控系统自动化水平的进一步提升。     

主井双向运输装卸载硐室改造施工工艺

花园煤矿采用主井实现固体物料自地面向井下高效运输,运煤运料联合运行。由于原先的装载硐室已不具备卸料的要求,因而主井装载硐室的改造施工成为解决充填开采的关键。花园煤矿采用分段施工方法,施工效果较好,经济效益明显。主井装载硐室的成功改造,为类似条件矿井矸石下井提供了重要的技术借鉴,对综合机械化固体充填开采的物料运输途径的发展具有重要意义。     

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。