煤矿电厂风机系统的远程集控系统设计

结合煤矿电厂中风机系统的运行特点和监控要求,选用S7-300 PLC为下位机核心、Win CC为上位机软件核心,设计了一个具有设备运行状态监视、参数显示与记录、故障报警与远程控制功能的集控系统。该系统具有较好的操控界面,且能利用工业以太网进行数据通信,实现了电厂风机系统的远程控制与管理。     

基于PLC的采煤机本地控制监控系统设计

借鉴模块化的思维模式,基于PLC对采煤机本地控制监控系统进行研究,本地控制系统将PLC与变频器相结合,采用交流变频调速技术,提高了工作效率。监控系统采用Simatic Win CC组态软件,通过统一的通信连接组态、数据管理与编程实现与硬件系统的无缝集成,降低了工作量。     

基于Win CC的煤炭机械化采制样监控画面工程设计

介绍了西门子组态软件Win CC(视窗控制中心)在煤炭皮带中部采制样监控系统中的应用,结合该系统工艺流程重点设计了监控系统主界面、系统故障报警、设备状态显示、历史数据查询等界面,实现对煤炭皮带中部采制样系统内单体设备启停、主系统启停、故障监控等的控制与监控,可形成友好的人机交互界面以提升煤炭采制样的机械化、自动化程度。     

矿区生活污水处理自动控制系统设计

矿区生活污水处理控制系统是解决矿区生产、生活对环境影响的一个重要课题。污水处理系统可以促进水资源的循环使用,有利于企业走上节约型企业之路。本设计采用西门子S7-300系列PLC,采用工业以太网网络架构,上位机采用西门子Win CC监控软件构成整个污水处理控制系统。     

基于Profibus-DP总线的变频器通讯控制系统设计

针对变频器采用Modbus通讯协议通讯数据量小、组态编程复杂的问题,设计了基于Profibus-DP总线的变频器通讯控制系统。系统以S7-300为主站,3个ASC800变频器作为从站,在STEP 7下对PLC进行硬件组态和编程,并设计了基于Win CC的上位机监控软件,可为实际应用提供参考。     

基于雷达料位计的煤仓煤位监控系统的应用

该煤位监控系统通过使用雷达料位计、可编程控制器以及Win CC动态组件等,实现了对3~8 mm块煤及大块煤煤仓中煤位的远程监测监控以及给煤机和胶带运输机的自动化启停功能,实现了控制与监视一体化。     

基于雷达料位计的煤仓煤位监控系统的设计及应用

该煤位监控系统通过使用雷达料位计、可编程控制器以及Win CC动态组件等,实现了对于大块及38块煤仓中煤位的远程监测控制以及给煤机和带式输送机的自动化启停功能,从而实现了监视与控制系统的一体化。     

矿井带式输送机节能优化与智能控制系统研究

针对带式输送机在轻载状态时的耗能问题,利用BP神经网络建立了由煤流量、输送带运行速度和系统总功率构成的节能优化模型,提出了基于变频调速的带式输送机节能控制策略;结合可编程控制技术、现代传感器技术和智能控制原理,设计了基于PLC的模糊控制器,完成了控制系统的硬件选型与软件设计;通过Win CC组态软件设计了上位机系统,实现了带式输送机远程控制和实时监控。     

Wincc Flexible组态软件在磨矿分级监控系统中的应用

针对以往磨矿分级监控系统处理故障不方便的缺点,介绍了一种基于S7-300PLC+Wincc+Wincc Flexible的磨矿分级监控系统。该系统将触摸屏放置在现场,可以方便快捷地处理故障。在实际应用中,它的可靠性和处理故障的便捷性比以往监控系统都有进一步提高。     

S7-300 PLC软冗余在输煤自控系统中的应用

以某60万t焦化厂的输煤自控系统为项目背景,设计了基于S7-300 PLC软冗余技术和Win CC平台下的煤炭运输系统控制方案。实际应用说明本套系统满足所需控制要求,提高了生产效率,为焦化厂取得了良好的经济效益。     

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     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

Brief news

正Corun invested another 50 million yuan in power battery for HEV Hunan Corun announced on 27 June that they had signed the cooperation agreement to jointly built Corun(Shaoxing)Autos Power Battery System Co.,Ltd.in Shaoxing Binhai New City.According to the announcement,total registered     

铜熔炼中锍品位对杂质元素分配行为的影响

借助于多相、多成分系统中平衡计算的手段，开发出微量元素砷、锑、铋及伴生元素铅、锌等在铜熔炼中分配行为的计算机模型。利用该模型对铜熔炼过程进行计算机模拟，分析了冰铜品位对砷、锑、铋、铅和锌等杂质元素的分压、活度系数及它们在冰铜、炉渣和气相中分配率的影响，并讨论其热力学分析结果对生产实践的指导意义。     

New energy vehicle:an opportunity for rare earth magnets

<正>Extracted from Securities Guide 1.Popularity of new energy vehicles—an irresistible market trend1.1 Progress of new energy vehicles Chinese Premier Li Keqiang said recently on a visit to Xi'an BYD Autos that new energy vehicles,especially new energy bus,can lessen environment and noise pollution.He encouraged the use of new