矿井局部降温系统设计研究

为了解决深井热害问题,研发了矿用气动蓄冰空调系统。该系统整合了降温除湿和空气净化两大系统,主要用于避难硐室,具有广阔的市场前景与良好的社会效益。矿用气动蓄冰空调系统的优点主要有:(1)无电化设计,可避免二次灾害发生,具有较高的安全性和可靠性;(2)自动控制,准确可靠;(3)制冷功率大;(4)降温、空气净化及除湿一体化设计;(5)采用蓄冰球蓄冷及释冷,制冷和释冷效率高;(6)采用机械通风,风量大,强制对流,降温速率快;(7)适用环境温度范围宽。     

矿用救生舱相变材料与蓄冰复合制冷系统研究

研究了一种矿用救生舱相变材料与蓄冰复合制冷系统。通过实验验证出一种较好的相变材料与冰复合制冷体系;测试了内壁安装无机相变材料的救生舱传热系数较原先仅有保温材料的救生舱传热系数小0.425 W/(m2.K);顺利通过环境温度:55℃,24 h;30℃,82 h模拟真人实验。     

煤矿救生舱空调技术发展应用现状及热力学分析

国内煤矿安全形式严峻,发展救生舱技术刻不容缓。救生舱为矿难受困人员提供避险场所。舱内空间封闭,人体代谢热湿负荷若不及时消除,将危及生命,必须配备空调系统保障生命安全。结合国内外救生舱技术最新应用现状,对比分析分体式空调、液化气相变、压缩空气和冰蓄冷等空调方式,对未来发展方向做出展望。     

矿用救生舱蓄冷型降温系统研究

提出了一种应用于矿用救生舱的蓄冷型降温系统,利用Flow Simulation有限元分析软件对救生舱内部温度场进行研究,探讨了不同风路结构对温度场分布的影响。仿真结果表明,在进风口风速一定的情况下,采用方形截面的风道散热特性最为优良;采用弧形风道管可以减少风阻,促进空气的流通,加速舱内的降温。     

蓄冰空调工况对避难硐室生存区热舒适性的影响

为测试蓄冰空调不同工况(包括不同剩余冰量、循环风量)对避难硐室生存区热舒适性的影响,测试了不同工况时蓄冰空调的实际制冷性能;在此基础上采用RNGκ-ε模型和SIMPLE算法模拟分析了蓄冰空调不同工况时某50人避难硐室生存区内速度场、温度场及热舒适性的变化情况。研究表明,空调剩余冰量越多、循环风量越大,空调实际制冷功率越大,生存区热舒适性越好;同时还提出了蓄冰空调最低循环风量要求的工程计算公式。     

矿用安全救生舱的发展趋势研究

智利矿难33名矿工的成功获救不仅震撼了世界,也加快了我国矿井安全技术的研发,主要介绍了国内矿用安全救生舱的分类、研制发展现状和市场分析,认为矿用安全救生舱具有很大的发展潜力,也是市场急需的产品。     

煤矿可移动式救生舱内部热环境设计参数

对可移动式救生舱内人员的人体热平衡与水平衡进行了分析,计算了不同温度和湿度时舱内人员的散湿量、排汗率和皮肤湿度。分析与计算的结果表明,舱内温度和湿度设计值与舱内人员每天的饮用水供应量有关,应根据舱内人员的热舒适感和饮用水供应量确定舱内的温度和湿度设计值。在相同的温度下,采用较高的舱内空气湿度设计值可以减少空调除湿负荷,减少救生舱空调系统所需的蓄冷量。     

矿用救生舱配置原则与应用研究

救生舱是地下矿山发生诸如爆炸、瓦斯突出、冒顶、外因火灾、涌水、塌方冒顶或者有毒有害气体逸散时供人员避难的安全设备,是可供矿工紧急避险的生命庇护场所.由于我国研制和应用起步较晚,现阶段在技术标准、使用、维护和系统配置方面还需要深入研究.本文根据煎茶岭金矿十多年使用矿用救生舱的实践检验,结合矿用移动式救生舱配置技术标准,提出一些系统配置原则,对我国矿山使用、维护矿用移动式救生舱提供可借鉴经验.     

煤矿救生舱的爆炸模拟分析

煤矿救生舱将成为矿工井下逃生的重要设备,其结构强度直接决定了矿工的生命安全。为提高救生舱强度,在ABAQUS环境下建立了救生舱的有限元模型,使用显式积分方法得到了在煤矿瓦斯爆炸时的压力对救生舱的影响。救生舱的最大应力出现在角落应力奇异处及肋板中部部分区域并达到了屈服强度,但救生舱的总体应力大小在允许范围之内。     

矿用救生舱电磁兼容性设计探讨

对矿用救生舱的组成进行了介绍,分析了影响其电磁环境的主要干扰源,在此基础上,重点从电源、传输电缆和舱体屏蔽三方面论述了矿用安全救生舱电磁兼容设计,可为矿用救生舱可靠性设计提供参考。     

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.     

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     

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     

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.     

China rare earth market review

正November 1~10,2014Chinese rare earth market was still inactive.Demand for rare earth products was weak.Consumers took a wait-and-see attitude for lower price.As it was an off season for rare earth products,it was expected that prices of rare earth could continue turbulence at the bottom in short terms.Due to a sharp drop,demand for rare earth from downstream recovered.Affected by new energy vehicles,wind powder and energy-efficient appliances,production of rare earth permanent     

China rare earth market review

正August 1~10,2014 There was some good news in rare earth industry recently.Restructuring plans of rare earth groups led by Baotou IronSteel Group and Xiamen Tungsten Group respectively have been approved by MIIT.And rare earth storage policy,which had been expected for a very long time,has been launched officially.Pushed by the good news,rare earth price started to rebound since August 5.Price of didymium oxide and dysprosium oxide rose about 1% to 2%,averagely.About 10% of     

China rare earth market review

正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,     

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     

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