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- main mine fan 矿井主扇
- The main mine resources are coal, granite, limestone, kaoline and marble etc. 矿产资源主要有煤炭、花岗岩、石灰石、高岭土、大理石等。
- Consequently, the main mining areas are those associated with zinc. 因此,主要的矿区久是这些和锌有联系的地方。
- Abstract: This paper introduces the application of change-frequency velocity modulator in the mine fan,analyzes and compares energy charge before transformation with after.Change-frequency velocity modulator has notable saving electric energy effect. 文摘:介绍了变频调速器在通风机改造中的应用,对改造前后的能耗进行分析比较,具有显著的节电效果。
- The upward horizontal slice stoping and filling without intervening pillar is the main mining method in Huangshaping Pb-Zn Mine. 摘要上向水平分层充镇无间柱采矿法是黄沙坪铅锌矿的主要采矿方法。
- The development trend of abroad mine fan 国外矿用风机发展趋势
- Phosphate can hinder the formation of pure mineral C 4A 3 S . When the amount of P 2O 5 is more than 0.5%,the content of main mine ral C 4A 3 S and C 3S remarkably decrease,free lime increase,and the various age strength of the cements obviously decrease. 磷阻碍C4A3S单矿物的形成,当P2O5达0.;5%25以上时,系统的C4A3S及C3S形成量明显减少,f-CaO升高,水泥各龄期强度均显著降低。
- Reversing installation for mine fan 矿井返风装置
- This paper presents the high-voltage variable-frequency speed regulation system of a main mine hoist.The echniques of vector control and synchroniged rectification are used in the system. 主要介绍了矿井主提升机变频调速电控装置的关键技术研究。采用矢量控制技术及同步整流技术,实现提升全过程变频调速控制。
- This paper presents the high-voltage variable-frequency speed regulation system of a main mine hoist. The echniques of vector control and synchroniged rectification are used in the system. 主要介绍了矿井主提升机变频调速电控装置的关键技术研究。采用矢量控制技术及同步整流技术,实现提升全过程变频调速控制。
- Open pit mines are the main mine types in Nanjing,and their exploitations have occupied and destroyed large natural resources. 禁止开山采石后,加强矿山环境恢复治理是促进资源合理开发利用与生态保护相协调的必然要求。
- Fengfeng Group (China), first installed TCK Wire Rope On-Line Automatic Monitoring System in their three pairs of main mines in 2006. 峰峰集团于2006年在三对主力矿井中配置了TCK钢丝绳在线自动监测系统。
- Study on Performance Test and Fault Diagnosis of Mine Fan 煤矿通风机性能测试与故障诊断研究
- Through the analysis of dry distillation and composision of the Oil shale of main mining area in our country, The main physical and chemical characteritics are found out. 通过对我国油页岩主要矿区的油页岩进行的铝瓶干馏分析、组分分析,了解到了我国的油页岩的主要理化性质。
- Excavator to the lower reaches of the main mining quarrying, road construction and water conservancy construction in the main, basic occupied by more than 50% share. 挖掘机的下游主要以采石矿、道路建设和水利建设为主,基本占据了50%25以上的份额。
- My company's main mining and minerals trade, now has copper, niobium Y Mine, one of the tungsten and molybdenum mine, for domestic and foreign customers with quality service and minerals. 我公司主营矿业开发及矿产品贸易,现拥有铜矿、铌钇矿、钨钼矿各一座,可为国内外客户提供优质矿产品和服务。
- The main impediment to growth is a lack of capital. 影响发展的主要障碍是缺乏资本。
- Crowds thronged the main square of the city. 城里的大广场上挤满了人群。
- Each main exhaust pipe shall have one exhaust fan. 一个风机控制一个主要的排气管道。
- A secondary mine passageway between two main shafts or tunnels. 次要矿山甬道矿井中连接两条大隧道的小巷道