大型矿井排水设备选型计算

排水设备选型的优劣不仅直接影响矿井初期投资和运转费用,而且影响安全生产。根据现代化大型煤矿-红庆梁矿井正常涌水量及最大涌水量,给出了矿井排水设备选型与计算方法。通过计算水泵排水能力、管路阻力系数、工况点参数、排水管路壁厚、电耗,确定主排水设备和应急排水系统选型结果,为大型矿井的排水设备选型提供参考。     

平煤天安八矿新副井二水平排水设备设计

提出了新副井二水平排水设备的设计方案,并对该技术方案进行了分析比较,进行了水泵、管路、电动机、配电及控制选型计算及校验,安全可靠性满足《煤矿安全规程》的要求。     

土城矿15采区延伸排水系统设计

针对土城矿15采区延伸排水系统的设计、排水设备的选型计算、排水管路的选型计算、井下水仓容积及断面的设计进行全面的介绍。     

立井井筒排水管路壁厚设计与优化

针对立井井筒排水管路壁厚设计、选型和优化等问题,通过应用流体力学的运动学知识对排水管水流速度进行计算,根据流体动力学的伯努利方程获得排水管承受的最大压力,依据《煤矿井下排水泵站及排水管路设计规范》对排水管壁厚进行计算,最终得到排水管所需的壁厚。通过ANSYS有限元分析软件对排水管的壁厚选型进行校核,使用MATLAB软件对排水管路的分段壁厚及长度进行优化,最终得到排水管路的最优壁厚和对应管路长度。     

煤矿主排水设备选型设计

水患是煤矿重大灾害之一,为了矿井安全高效开采,排水应满足煤矿安全规程的要求。为了达到排水的要求,矿井设计中合理进行排水设备的选型是排水安全生产的基础。以曹家滩煤矿为例,介绍了煤矿主排水设备选型的方法。排水设备选型以煤矿涌水量及排水高度为基础,通过合理的方案比较,选择最适合本矿井的排水设备,为矿井排水系统设备选型设计提供一种借鉴,为矿井的安全生产提供了有力的保障。     

矿井排水设备选型程序简介

矿井排水设备选型优化设计程序编制 本程序采用BASIC语言在IBM微型电子计算机上编制,绘图程序采用BASIC语言和DM/PL绘图命令编制,在HI滚筒式绘图机上绘制。 1.程序编制主要技术依据 本程序遵守、采用的主要规程、规范、技术经济参考资料有:《煤矿安全规程》、《煤炭工业设计规范》、《煤矿井下排水设计技术规定》、《煤矿生产经营费指标》、《矿山固定机械手册》、《BASIC语言程序库》、《流体力学与流体机械》。产品设备及管件主要采用:D型水泵,PJ型水泵,DS型高速水泵,QKSG型潜水泵;直径为50～500mm标准系列的钢管;直径为50～500mm,压力为6kgf/cm~2～100kgf/cm~2的各种闸阀、逆止阀、管件和ZPB型射流泵等有关技术、经济、外形和安装等参数。     

矿井排水设备选型设计的探讨

在矿井排水设备选型计算中,排水管路阻力系数是选择水泵运行工况点的重要参数之一,水泵轴功率的计算应能满足在矿井服务年限内多种运行工况。合理选择计算排水管路阻力系数、水泵工况点、轴功率,对排水设备经济合理以及安全可靠的运行都十分重要。     

矿井排水设备选型设计的探讨

在矿井排水设备选型计算中,排水管路阻力系数是选择水泵运行工况点的重要参数之一,水泵轴功率的计算应能满足在矿井服务年限内多种运行工况.合理选择计算排水管路阻力系数、水泵工况点、轴功率,对排水设备经济合理以及安全可靠的运行都十分重要.     

矿井通风设备的选型计算

介绍了矿井通风设备的选型过程,参照矿山的具体数据,结合《煤矿安全规程》、《煤矿设计规范》的各项规定,参考《矿山固定机械手册》、《流体机械》的推荐算式精确计算,最后确定通风设备。     

综采工作面乳化液泵站的选型计算

乳化液泵站的选型过程,参照矿井的实际,结合《煤矿安全规程》、《煤矿设计规范》的规定要求,参考《煤矿乳化液泵站、乳化液泵标准》、《煤矿综采新工艺新技术与机械设备选型实用手册》的推荐算式精确计算,最后确定乳化液泵站设备选型。     

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     

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     

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.     

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.     

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     

2014 second batch of rare earth quota released

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