水-乙二醇难燃液压液

叙述了难燃液压液的分类及水 -乙二醇在难燃液压液中的重要地位 ,同时叙述了水-乙二醇难燃液压液的产品标准、国内外主要制造商的产品的典型数据及使用水 -乙二醇难燃液压液的注意事项。长城公司本次研发的水 -乙二醇难燃液压液产品达到研制目标及国内外同类产品水平。     

煤矿难燃液压液管理现状及管理措施

阐述了难燃液压液对于煤矿井下安全的重要性,介绍了难燃液压液的分类及特点,分析了难燃液压液使用过程中因质量问题引发的后果及国内外对于难燃液压液的管理现状,并对今后的管理措施进行了探讨。     

难燃液压液喷射燃烧试验设备的研究

为了加强难燃液压液的难燃性能检测与质量控制,介绍了2种液压液喷射燃烧试验方法,以液压泵系统代替氮气瓶为压力源,通过对喷嘴、液压系统及点火排风系统的选型设计,研制出了国内首套喷射燃烧试验设备。利用研制的喷射燃烧试验设备采用ISO 15029-1评价方法,对具有不同难燃性能的液压液进行了喷射燃烧试验,试验结果显示：水-乙二醇液压液的火焰持续时间为0,无水全合成液压液的火焰持续时间为2.3～9.8 s,抗磨液压油的火焰持续时间为49.8～52.1 s。试验结果反映了液压液产品的难燃性能,因此,此试验设备可用于液压液难燃性的检测检验。     

喷射燃烧试验对液压液难燃性能的评价

出于安全考虑,难燃液压液在一些特殊行业获得广泛应用,如煤炭、钢铁、冶金、电力等行业。介绍了国内外难燃液压液的检验标准,重点讨论了几类有代表性的液压液喷射燃烧难燃性。喷射燃烧难燃性检验结果与开口闪点、歧管难燃性检验方法得到的结果具有很好的一致性,是一种科学、有效的评价方法。     

矿用水-乙二醇难燃液压液的台架试验研究

为解决传统矿物油型液压油的易燃问题,调配出矿用水-乙二醇难燃液压液YNC-46.为考察YNC-46难燃液的使用性能及对液压元件的适应性,选用液压锚杆钻机的齿轮泵站进行台架试验,并与矿用46号抗磨液压油、冶金行业用46号水-乙二醇难燃液进行了对比.台架试验结果表明:YNC-46难燃液具有优良的黏温性能,黏度指数达到210,可保证设备在不同温度下正常运行;YNC-46四球常磨值为921N,与矿用46号抗磨液压油相当,具有良好的润滑性,可降低齿轮磨损情况;YNC-46难燃液导热性好,其为水基体系具有很好的比热容,体系运转时平衡温度低于46号抗磨液压油,可延长设备使用寿命.此外,试验证明YNC-46难燃液稳定性好,抗剪切性能优越,与液压设备的密封材料适应性良好.     

瓦斯抽放液压钻机用MSY－40难燃液压液

瓦斯抽放液压钻机用ＭＳＹ－４０难燃液压液ＭＳＹ－４０难燃液压液是一种非聚醚稠化溶液型难燃液压液，它是为解决引进英国和国产坑道液压钻机需用而开发研制的一种新型含水工作液。该产品经英国ＦＲＡ－１６０型和国产ＭＹＺ－１５０型坑道液压钻机的工业性试验，钻孔１...     

水基增稠液压液及增稠剂的研究

水基增稠难燃液压液，是安全型液压工作介质。文章从合成高效聚醚增稠剂的研制开始，介绍了ＭＷＢＦ－１６水基增稠难燃液压液主要研究内容、性能比较，其综合性能达到了国际同类产品的先进水平。     

煤矿井下用水-乙二醇难燃液压液的研制

通过对水-乙二醇体系难燃液压液的研制和性能的考查,选择了性能优良的黏度调节剂、润滑抗磨剂、消泡剂、防锈剂等多种添加剂,研制出各项性能指标均达到或超过国标要求的煤矿井下用水-乙二醇难燃液压液。     

矿用HFC型水-乙二醇难燃液压液的应用

根据现用矿用液压油的性能指标及要求,研制出新型矿用HFC型水-乙二醇难燃液压液,并在煤矿井下用液压张紧装置上使用,结果表明新型水-乙二醇难燃液压液性能指标与46号液压油相当,具有优良的润滑性、黏温性能和稳定性,满足液压设备的要求,可保证其正常运行。     

难燃液压液抗燃性能评价方法

研究了开口闪点和燃点测定法、芯式燃烧持久性试验法、歧管燃烧试验法及喷雾燃烧试验法等4种抗燃性能检测方法,初步筛选出适合液压支架用乳化油、浓缩液、防冻液、水-乙二醇型难燃液压液及无水全合成型难燃液压液等产品的抗燃性能评价方法。     

采煤机多信息故障诊断系统平台设计

采煤机是煤矿高效生产的关键设备,对其进行故障诊断及预测具有重要的意义,目前国内外的相关诊断技术都有各自的局限性。针对采煤机检测信号数据繁杂、难以处理的问题,建立了基于特征值和BP神经网络相结合的的故障诊断模型,利用Lab VIEW和MATLAB混合编程技术开发了采煤机多信息故障诊断软件,即通过对振动、电流、温度信号进行谱分析,建立特征值历史曲线,利用BP神经网络对故障进行分类。通过对齿轮箱故障信号的分析,证明了该软件不仅可靠性高,而且界面友好、计算精度高以及功能易扩展等优点。     

微震监测评价卸压爆破效果的方法

采用时-频分析技术,研究了徐州三河尖煤矿9202冲击矿压高危险工作面开采过程中卸压爆破微震信号的频谱特性,通过对微震信号的谱特性分析,进行卸压爆破效果的评价,从而为冲击矿压灾害动态防治效果的有效检验提供一条新方法。     

西出阳关遇故人 投身玉门学钻井

小时候父辈就教导 :国家科学技术不强 ,只能遭受外国欺凌。为了报效祖国 ,大学里先学航空想造飞机打日本 ,其实哪有那么简单。学了 2年多 ,没有经济来源 ,无奈只有放弃“上天”梦想 ,改为“入地” ,学了采矿工程。抗日战争期间 ,全国只有一个油矿 ,于是和 8位同学商议好 ,毕业以后 ,“西出阳关”去玉门。到了那里我们大吃一惊 ,所有的设备机器全是进口的 ,还有一批留学回国人员 ,唯一奇缺的是年青的学子。于是我们分到了钻井、采油、机械、炼油等部门 ,勤奋地学习了不少新知识。     

A Review of Emerging Technologies for Sustainable use of Coal for Power Generation

Concerns about climate change and environmental consequences of increased levels of atmospheric CO 2 will require the power generation industry to reduce CO 2 emissions from current levels. Unfortunately, for reductions to have the desired effect they will have to be large. While the schedule of the Kyoto Protocol may appear daunting, in the long term mere compliance with the protocol will hardly change the rate of increase of atmospheric CO 2. There are, however, technical, economical and practical choices that will allow the industry to meet the requirements of protocol and ultimately stop the increase in atmospheric CO 2 without eliminating coal from the fuel mix. In this paper, we present a review of current and emerging technologies for CO 2 sequestration. We provide a summary of the underlying scientific principles and discuss the practical and economic aspects of sequestration technologies, which will allow continuing use of global coal resources with minimum or no impact on CO 2 levels in the atmosphere.     

减振器速度试验台曲柄连杆机构的动平衡分析

介绍了减振器速度试验台的结构与原理,对其中的曲柄-连杆机构进行了动平衡分析,通过计算和分析比较,确定了平衡块的质量和位置,消除了系统整体惯性力,为确保该试验台的性能提供了保障。     

Design of a dust tower for suppression of airborne particulates for iron making

Proper characterization of a dust suppressant represents a significant challenge. There has been confusion on what makes an effective dust suppressant. Many have argued that a dust suppressant must wet the material effectively and rapidly to control airborne dust. As a result, dust suppression studies have been heavily dependent upon laboratory wetting experiments such as contact angles, fine particle engulfment rates, and particle bed experiments to characterize dust suppressants. It has been believed that an effective dust suppressant should produce a low contact angle, and engulf particles rapidly thereby wetting the surface effectively and reducing airborne dust levels. However, these methods only characterize how the suppressant wets a given material, which does not directly correlate to the ability to suppress dust. Furthermore, a clear correlation between wetting enhancement and dust suppression has not been demonstrated. In order to address this gap, a novel dust tower was constructed which provided direct material dustiness measurements and allowed for a more realistic evaluation of dust suppressant effectiveness. This unit was able to clearly distinguish differences in dustiness that resulted from treatment of iron ore pellets with several different dust suppressant chemicals.     

Amenability for processing of oolitic iron ore concentrate for phosphorus removal

Beneficiation routes aimed at dephosphorisation of oolitic gravity magnetic concentrate and involving a combination of roasting, re-grinding, magnetic separation and water and acid leaching are investigated. Roasting was carried out at 900 °C for 1 h without or with lime or sodium hydroxide as roasting additives. When additives were used, cement phases of Si–Al–Na–Ca–O type were detected as well as the mineral giuseppettite. During the thermal process sodium silicate is liquefied and the newly formed phases coat the oolites and penetrate inside the cracks. Energy Dispersive Spectroscopy analysis has indicated that the zone surrounding the oolites consists of Na, Al and Si phases with part of phosphorus being captured there. As a result of the alkaline roasting, goethite is partly transformed to magnetite and this reduction is reinforced with an increase in sodium hydroxide dosage. Investigation of redistribution of phosphorous shows that it could be only partly separated if leaching is not accompanied by re-grinding and physical separation. The recommended dosage of the reductive agent for the final flowsheet is 8 mass% ratio to concentrate. Grinding to a mean size of 0.040 mm, with water and acid leaching and double magnetic separation creates conditions to obtain a high-quality iron concentrate with 65.97% Fe and recovery of 92.43%, with simultaneous decrease in the phosphorus content from 0.71% to 0.05%.     

深化改革求发展加强管理创效益

两年来，在开拓地质市场方面取得了新的成绩，主要就５个方面的经验作了介绍。     

无烟煤气化型煤热强度测定方法的研究

对无烟煤气化型煤热强度的测试条件和方法进行了较为系统的,考察了加载速度、恒温温度、恒温时间、测试气氛、测定顺序等对测试结果的影响,提出了关于无烟煤气化型煤热强度的测试条件、方法及仪器设备,即恒温温度９００℃、恒温时间４５ｍｉｎ、埋沙、加载速度１０～１５ｍｍ／ｍｉｎ、马弗炉外测法,取６个煤球的平均值即为无烟气化型煤的热强度的测量值。