煤基活性炭制备中化学添加剂的应用对比

化学添加剂对煤制活性炭的制备过程具有一定的控制作用。以唐山矿长焰煤为研究对象,按照不同比例加入了不同量的ZnCl2和KOH,研究了炭化过程中化学添加剂对煤挥发性、煤产物微晶结构以及活化程度的影响,为煤基活性炭制备工艺的优化提供了参考。     

煤与瓦斯突出防治动态管理及实时预警系统在佳瑞公司的应用

为了防治煤与瓦斯突出事故,提高矿井突出防治管理、技术水平,建立了煤与瓦斯突出防治动态管理及实时预警系统.对矿井突出防治技术实施精细化、规范化和数字化管理,实现了矿井突出防治信息的过程化控制.对防突工作面瓦斯涌出特征进行深处理分析,实现了防突工作面非接触式、连续预警.最终形成了适合佳瑞公司特点的突出预警成套技术.     

科学改进国家煤矿安全监察机构工作机制和管理体制的探讨

运用科学发展和改革创新理念,针对国家煤矿安全监察机构面临的机遇和挑战,认为当前应当调整工作职责与重心,体现国家监察权威;联合地方政府部门,提升履职能力与行政效力;改进机构管理体制,推进煤矿安全监察事业的科学发展.     

煤化工工艺技术发展趋势浅析

本文主要针对目前煤中低温干馏的工艺技术现状,从节能降耗、资源充分利用角度探讨洁净型煤化工工艺技术的发展趋势,对煤的中低温热解技术的选择具有重要意义。     

对青山选煤厂质量管理工作的分析

文章对青山选煤厂从入选原料煤质量管理到生产过程质量管理,再到全厂全员质量管理的各部门的管理特色进行了分析。     

煤矿地质测量中空间信息系统的设计研究

煤矿地质测量工作中空间信息系统的研究与设计,能对煤矿的地质情况进行直观展示,并能通过数据库管理煤矿钻探资料、煤层分布资料等重要数据。分析了煤矿地质测量的地位,并进一步研究空间信息系统的技术要点及设计原则,同时对煤矿地质测量系统的发展趋势进行展望。     

ATEX指令下的煤磨系统潜在爆炸性 环境区域划分

海外项目对煤系统使用符合ATEX标准的设备要求日益严格，这使得对整个工厂按照ATEX的要求进行潜在爆炸危险环境区域的划分以及选择适合的设备变的尤为重要，本文通过对EN 60079—10标准的解析，并结合执行过的两个煤系统改造项目，着重分析了对潜在粉尘爆炸危险环境区域划分的依据与办法，对类似煤粉制备项目的安全区域划分提出了建议。     

Towards the improvement of thermal efficiency in lignite‐fired power generation: Concerning the utilization of Polish lignite deposits in state‐of‐the‐art IGCC technology

Integrated coal Gasification Combined Cycle (IGCC) is the most advanced technology for coal‐fired power generation. The two‐stage entrained flow gasification process allows for the use of a wide range of coal, as long as the gasification temperature is above the ash melting point of a used fuel. In this gasification technology, lignite, which often has a low ash melting point, can be preferably utilized. However, ash fluidity is also another importance, because the behaviour of molten slag can diminish a stable ash discharge from a gasifier. As the eligibility of coal ash properties is a considerable factor, water physically and chemically kept in lignite (30 – 60% in mass) attributes to deteriorating gasification efficiency, because it causes significant heat loss and increasing oxygen consumption. Developing a thermal evaporative lignite drying method will be a necessary attempt to apply lignite to the coal gasification process. For those preceded objectives, coal and ash properties and drying characteristics of several grades of Polish lignite, extracted from Belchatow and Turow deposits, have been experimentally investigated in a preliminary study evaluating the applicability and consideration for its utilization in state‐of‐the‐art clean coal technology, IGCC. This paper particularly discusses the eligibility of Polish lignite from the perspective of the fusibility and fluidity of ash melts and the fundamental drying kinetics of lignite in superheated steam in the light of water removal. The viscosity of ash melts is measured at high temperature up to 1700 °C. In the drying tests, the significant influence of structural issues, because of the provenance and origin of lignite on the drying characteristics, was found by applying the method of sensitivity analysis of physical propensity. This paper concludes that the investigated Polish lignite has characteristics favourable for utilization in IGCC technology, once the precautions related to its high moisture have been carefully addressed. Copyright © 2016 John Wiley & Sons, Ltd.     

Effect of specimen size and shape on compressive strength of concrete containing fly ash: Application of genetic programming for design

The use of fly ash as a mineral admixture in the manufacture of concrete has received considerable attention in recent years. For this reason, several experimental studies are carried out by using fly ash at different proportions replacement of cement in concrete. In the present study, the models are developed in genetic programming for predicting the compressive strength values of cube (100 and 150 mm) and cylinder (100 × 200 and 150 × 300 mm) concrete containing fly ash at different proportions. The experimental data of different mixtures are obtained by searching 36 different literatures to predict these models. In the set of the models, the age of specimen, cement, water, sand, aggregate, superplasticizers, fly ash and CaO are entered as input parameters, while the compressive strength values of concrete containing fly ash are used as output parameter. The training, testing and validation set results of the explicit formulations obtained by the genetic programming models show that artificial intelligent methods have strong potential and can be applied for the prediction of the compressive strength of concrete containing fly ash with different specimen size and shape.     

锚索梁支护技术在薄煤层综采沿空留巷中的研究与应用

滨湖煤矿12202运输巷留巷中采用锚索梁支护方式,采煤时利用直接顶冒落矸石作为沿空留巷的充填材料,用工字钢棚作为巷内基本支护与巷内加强支护。矿压观测表明巷道支护状况良好,维护了巷道围岩的稳定性。