煤矿项目全生命周期工程造价管理

介绍了煤矿项目造价管理的发展历程,分析了目前煤矿产业的发展现状,具体说明了全生命周期工程造价管理在煤矿项目中的各个阶段的实施过程。     

VB+Access在煤炭物流信息系统中的设计与应用

文章主要针对VB和Access是什么、VB+Access在煤炭物流信息系统中的设计、VB+Access在煤炭物流信息系统中的应用和煤炭物流信息系统中VB+Access运用的必要性四个大的方面进行详细的探讨。     

浅析铁路漏斗装煤仓站站场布置中存在的问题

近几年来运煤铁路专线的建设速度不断加快,这对铁路装煤仓站的装载能力提出了新的要求,目前在我国新建的装煤仓站中,俗称为漏斗仓的不停车连续装煤设备被广泛应用。本文对漏斗仓装煤站场布置当中存在的问题进行了探讨,介绍了装煤站场中的基本车场及其功能,分析了目前普遍采用的4种装车线的利弊以及其合理的应用范围,最后对目前装车线中存在的问题进行了分析并提出了自己的解决措施。     

CO2 gasification characteristics of nascent pyrolyzed particles from coals and oil shale

In this work, the co‐pyrolysis characteristics of oil shale with two typical coals, bitumite and lignite, and the co‐gasification characteristics of the mixture pyrolyzed fuels were studied via thermo‐gravimetric analysis. The individual fuels and mixture fuels were first pyrolysis in N₂ atmosphere to specified temperature (450, 550, and 620 °C) at the heating rate of 20, 30 and 40 °C/min, respectively, and then maintained at the given temperature for 20 min before converted to CO₂ ambient to conduct the CO₂ gasification tests. The kinetic behavior and effects of both fuel types and pyrolysis temperature were investigated. The shoulder peak at around 550 °C observed in the derivative of weight loss derivative thermogravimetry analysis (DTG) curve during the pyrolysis of oil shale has confirmed the existence of specific reactions of oil shale at around 550 °C that leads to a sharp trough in the differential curves of co‐pyrolysis with coals and the unusual change in activation energies of gasification. In isothermal pyrolysis stage, oil shale lost its vast majority of organic matters at the temperature lower than 550 °C. The escape of pyrolysis gas and liquids in the coals is much harder than that in oil shale. The interaction between oil shale and bitumite was too weak to discriminate both in the pyrolysis and CO₂ gasification process. The variation of the particle surface structure caused by the releasing of volatile gases is strongly affected by the reaction rate and temperature. Quick volatile decomposition and gas releasing lead to the increase of surface area, decrease of the average pore diameter as well as the uniformization of the pore structure, while the higher temperature results in the blockade and merging of fine pores. The two factors lead to the greatest mass loss rate in the pyrolyzed particles obtained at 550 °C in temperature programmed CO₂ gasification stage. Two model‐free methods, Friedman method and Flynn–Wall–Ozawa method, were used to extract kinetic parameters from the experimentally determined pyrolyzed fuel conversions. The volatile contend has a significant influence on the fixed carbon conversion during the partially pyrolyzed particles' CO₂ gasification. In this study, significant interactions existed in co‐thermal utilization, both pyrolysis and CO₂ gasification, of oil shale and lignite. It is therefore surmised that co‐gasification of pyrolyzed lignite and oil shale may represent a feasible, practical route to high‐efficiency utilization of these fuels. Copyright © 2017 John Wiley & Sons, Ltd.     

配型煤炼焦工艺研究概况

配型煤炼焦是解决我国优质环保炼焦煤紧缺的有效途径。本文综述了配型煤炼焦技术的生产工艺及原理,给出了适合焦化厂技术改造的工艺流程。结合试验研究,考虑到焦炉的寿命和焦炭的质量,确定型煤配比的合理选择范围为15%～30%,并阐述了单种煤配型煤炼焦的效果。     

煤化工反渗透浓缩液的“零排放”技术的研究现状

随着近年来煤炭市场的萧条,我国煤炭企业面临着长期深度调整。可以预见,煤化工作为煤炭领域一个新的增长点,将在未来几年中得到广泛关注。然而,煤化工废水的处理,将成为制约企业发展的关键点。目前广泛采用的双膜法,虽然能够有效分离废水中的有机物和无机盐,但是所产生的反渗透浓缩液仍然难以处理。根据这一问题,探讨了现阶段可以采用的反渗透浓缩液深度处理技术和工艺,以及"零排放"技术面临的问题。     

新兴选煤厂煤泥水工艺系统改造方案可行性分析

对七台河新兴选煤厂煤泥水系统的工艺流程进行了详细分析,指出了系统存在的问题。针对问题提出了不同的工艺技改方案,并各自对其进行技术论证,最后选择一个作为最佳方案。该方案每年可以为新兴选煤厂增收     

极不稳定薄煤层采区通风系统之优化

根据天湖山矿区极不稳定煤层的赋存条件，分析历史沿用的开拓开采方式采区通风存在的问题，立足现场实际，提出一些优化方案，并在实践中加以改进。     

上市煤矿企业股权风险分析及对策

以我国成功上市的煤炭股份有限公司股权结构为实例,深入客观的分析出我国企业在该领域存在的弊端。通过借鉴国外上市企业的先进经验,为中国煤炭股份公司股权结构的改革调整提出了可行性意见。     

煤矿综掘工作面装备未来中短期发展展望

分析了当前煤矿煤巷、半煤岩巷和岩巷综掘机械化发展现状和面临的诸多挑战,结合我国煤矿地质复杂多变的实际,提出了切合我国煤矿综掘工作面装备发展的建议,希望对行业同仁和行业技术发展有所启发。