煤矸石作水泥混合材的活化方法研究

论述了煤矸石用作水泥混合材时如何激发其活性的若干方法 ,介绍了通常所用的热激活、物理激活和化学激活煤矸石的机理。实验显示了各种激活方法的效果 ,近而讨论了提高煤矸石活性时应注意的问题     

我国企业品牌弱势原因分析

我国是一个制造业大国但同时又是一个品牌弱国。我国企业由于缺少品牌优势,产品出口乃至整个国民经济都受到严重影响。我国企业缺少强势品牌的原因在于:缺乏品牌经营的环境和意识;品牌管理手段落后,缺乏战略性的品牌管理与规划;品牌价值观定位不准确,缺乏以品牌核心价值为中心的品牌识别;缺乏品牌战略管理组织与管理人才以及品牌的定期检查制度和危机处理机制。要改变这种状况,必须尽快更新观念,强化品牌基础工作,尤其是注重品牌组织管理体系的建设和专业人才的培养与引进,充分借鉴国外成功经验并结合实际不断创新。只有这样,才能提高本土品牌的影响力,逐步缩小与国外著名品牌的差距。     

亟待理顺我国的煤炭安全生产管理体制

我国煤炭生产安全形势严峻,需要政府加强安全生产管理。多重机构的管理模式是否就是加强了安全管理值得探讨。从调研中发现,现行分散的行业管理体制结构分解了煤矿的安全生产责任,鉴于煤矿安全生产的技术性很强,精简管理机构、强化职能责任是煤矿安全管理改革的目标,重视管理科学的实践应用,理顺煤炭生产安全管理体制迫在眉睫。     

Growth and morphology of nanometer LiMn2O4 powder

The growth of Li_1+xMn₂O₄ via detonation reaction was investigated with respect to the presence of an energetic precursor, such as the metallic nitrate and the degree of confinement of the explosive charge. The detonation products were characterized by scanning electron microscopy. Powder X-ray diffraction and transmission electron microscopy were used to characterize the products. Li_1+xMn₂O₄ with 1-2 μm spherical morphology and more uniform secondary particles, but with smaller primary particles of diameters from 20 to 60 nm and a variety of morphologies were found. The oxides produced by this cheap method affirmed the validity of detonation synthesis of nano-size powders.     

Study of trace elements in coal and mining wastes and its significance in China

In the world energy about 26% of all was dedved from coal combustion. Nearly 80% of the electricity produced in China is generated from coal. Coal will play the most important role in the coming 50 years as the past century in China. However one consequentially of the mining and combustion of coal is the mobilization of trace elements, especially trace metals, which have environmental and human health significance. Information on concentrations and distributions of potentially toxic elements in coal, and information On the modes of occurrence of these elements and the relations of the minerals in coal can help to predict the behavior of the potentially toxic trace metals dudng cleaning, combustion, weathering, and leaching.     

GJ5×2双槽剥片机及其在高岭土剥片中的应用

GJ5×2大型双槽剥片机是国内超细物料加工中最新出现的超细磨/剥片设备,也是目前国内这一领域内最大规格的设备,已成功应用于煤系硬质高岭土剥片中,单机能力可达1.5～2.0t/h,产品细度可达小于2μm颗粒占85%～90%。     

Laboratory simulated slipstream testing of novel sulfur removal processes for gasification application

The Wabash River Integrated Methanol and Power Production from Clean Coal Technologies (IMPPCCT) project is investigating an Early Entrance Coproduction Plant (EECP) concept to evaluate integrated electrical power generation and methanol production from coal and other carbonaceous feedstocks. Research, development and testing (RD&T) that is currently being conducted under the project is evaluating cost effective process systems for removing contaminants, particularly sulfur species, from the generated gas which contains mainly synthesis gas (syngas), CO₂ and steam at concentrations acceptable for the methanol synthesis catalyst. The RD&T includes laboratory testing followed by bench-scale and field testing at the SG Solutions Gasification Plant located in West Terre Haute, Indiana. Actual synthesis gas produced by the plant was utilized at system pressure and temperature for bench-scale field testing.     

近距离下覆4#煤层综采工作面顶板管理经验

介绍了近距离深层综采工作面顶板和巷道顶板管理经验，及综采工作面在通过巷道冒项区域时所采取的办法和措施。     

掺杂WRe3、WRe25合金的高温电阻－温度特性

本文报导了采用一种新型高温陶瓷发热体高温管状炉，通以氩气保护，测量ＷＲｅ合金丝的电阻－温度（１６００℃）特性试验方法，该方法较真空炉简便、实用且试验费用低而准确，测量数据与美国研究报导一致。     

Explosion risks during the confined storage of bituminous coals : Calculation of gaseous hydrogen accumulation in ship holds

Bituminous coal piles stored in the open air can undergo autocatalytic heating accompanied by the emission of small but appreciable amounts of molecular hydrogen. When the coal is contained in a confined space and the temperature reaches 40°C, accumulation of hydrogen is expected. This process has been observed for a wide variety of bituminous coals. The amount of hydrogen gas expected to accumulate in the air pocket above the coal cargo in ship holds (assuming that the coal's temperature approaches 40°C during the voyage) has been calculated. The results clearly indicate that in most cases the hydrogen concentration will be appreciably above the lower explosion limit in air. Hence when bituminous coals are stored in a confined space (e.g. a ship hold), the explosive risk of hydrogen should be taken into account.