节能减排与动力煤洗选

文章从煤炭成分构成分析入手，阐述了加强动力煤洗选是煤炭和电力行业实现节能减排的基础，是合理利用资源、节约资源、改善环境、提高企业效益的保证。同时针对我国动力煤洗选的现状，提出了加大动力煤洗选深度的对策和措施。     

开发低成本深度洗选动力煤新工艺

为提高煤炭利用效率,加强环境保护,发展洁净煤技术,提高洁净煤比重,发展洗选动力煤产业是其重要措施.而发展洗选动力煤产业要开发低成本深度洗选技术.据此提出利用气流分级技术开发脱粉入洗选煤工艺.     

开发低成本深度洗选动力煤新工艺

为提高煤炭利用效率，加强环境保护，发展洁净煤技术，提高洁净煤比重，发展洗选动力煤产业是其重要措施。而发展洗选动力煤产业要开发低成本深度洗选技术。据此提出利用气流分级技术开发脱粉入洗选煤工艺。     

动力煤选前脱粉分级的必要性及技术发展的探索

根据我国动力煤能源结构分布明确动力煤洗选的发展方向,从动力煤市场发展需求、大型动力煤选煤厂产品定位和动力煤脱粉入选在节约运力、节省洗选能力、提高块煤入选比例、减少因水分影响提高煤炭发热量带来的经济效益等方面的优势来阐述动力煤选前脱粉分级的必要性,同时提出传统脱粉过程遇到的问题及对筛分分级技术的探索,以期从根本上解决筛分堵塞问题,推动动力煤分选的发展。     

刊首语

<正>煤炭洗选加工是提高煤炭产品质量、满足用户需求、提高资源利用效率、实施环境保护的有效途径,是实现煤炭资源洁净、高效、综合利用的重要措施。大量的实践表明,经过洗选的炼焦精煤灰分每降低j%,炼铁高炉利用系数可提高约4%;经过洗选的动力煤     

浅论小型煤矿应用自生介质工艺选选动力煤

分析了当前小型煤矿煤炭洗选加工的现状和面临的问题,介绍了自生介质螺旋滚筒－旋流器工艺系数,认为应用自生介质选煤工艺系数兴建选煤厂,洗选动力煤是可行的。     

PLC在煤炭洗选运输控制系统中的应用

河南省某煤矿选煤厂煤炭洗选依据原煤生产工艺,近期采用动力煤配煤技术进行煤炭洁净洗选,选用S7-200系列可编程控制器(PLC)替代传统的继电器控制系统,实现原煤系统自动化控制.     

发展动力煤洗选加工 促进节能减排

介绍了我国动力煤资源状况与洗选加工现状,总结了"十一五"期间动力煤洗选加工所取得的成绩与存在问题,分析了动力煤洗选加工工艺以及动力煤洗选对实现节能减排的重要意义,并对动力煤洗选加工提出了几点建议。     

谈动力煤洗选加工

本文概述了我国动力煤洗选加工现状，并以用户对动力煤质量要求为依据，论述了动力煤洗选加工的意义和效益，文章最后提出了动力煤洗选加工存在的问题和相应的建议。     

平煤八矿丁组煤洗选工艺的确定

煤炭洗选是实现煤炭高效、洁净利用的首选方案.通过对多种选煤工艺的分析比较,结合平煤八矿的实际,对3种选煤方案进行了对比,确定了适合丁组煤煤质的跳汰洗选工艺.该工艺可靠性高,工艺简单,适应性强.在平煤八矿动力煤(丁组煤)洗煤厂应用后,取得了良好的社会效益和经济效益.     

金属铋的结构与磁致电阻及热电效应

从铋晶体的结构出发,阐述其结构与磁致电阻及热电效应之间的关系。介绍有关铋的磁致电阻效应及热电效应的最新研究成果。铋纳米材料可能成为具有生产开发价值的磁感应材料与热电转化材料。     

我国振动筛的市场现状及发展对策

鉴于振动筛在我国煤炭洗选工业中的重要性,结合目前的国内经济环境、煤炭市场及国家相关的煤炭政策,概述了我国选煤工业所面临的新形势,分析了我国目前振动筛的市场发展现状及所取得的创新性成果,针对我国振动筛行业发展过程中所存在的各种问题,提出了今后我国振动筛行业的发展对策及建议,为我国振动筛行业的健康与快速发展提供借鉴和参考。     

矿山设备故障诊断复合监测技术

为了实现基于状态监测的预知性维修,在矿山应用了油液监测、声音监听、温度监测、振动监测等多种技术方法。通过状态监测和故障诊断技术获得的设备状态信息可及时发现故障征兆、故障原因以及预测对未来的影响,从而积极主动地进行保养和维修。实践和案例分析证明,通过应用适合矿山设备特点的多种状态监测与故障诊断技术完全可以实现基于状态监测的预知性维修。     

通风机启动方式和调节方法及其关系

为了合理选择矿井通风机控制装置,提高通风设备的运行效率,对不同启动方式和调节方法的设备配置、运行特点及适用条件进行研究分析,揭示了矿井通风机工况点受管网特性曲线和通风机特性曲线共同作用下的移动规律及对应的能耗变化,给出了高效节能的通风机设计思路和方法,为提高矿井通风机的管理水平和运行效率提供了理论依据.通过对通风机启动和调节关系的分析,给出了启动装置和调节装置统筹考虑的设计思路,为正确选择合适的启动方式和高效的调节方法提供了参考.     

陷落柱特征及导富水性分析

该通过对晋城矿区凤凰山井田勘探与生产揭露的陷落柱统计及观测,采用定量与定性相结合的方法,分析研究了陷落柱成因、陷落中心岩性、结构与构造特征、水平和纵断面形态、发育规律及导富水性,为矿井采掘生产布局提供了科学依据。     

Ground-water as a nuisance

In certain circumstances, ground-water causes geotechnical problems and can be considered a nuisance rather than a blessing. The cases where ground-water creates considerable complications include construction, tunnelling, mining, landslides, and land subsidence. The development of hydrogeology as a science has proved over the years to substantially reduce the severe problems and disasterous problems caused by ground-water.     

边抽边掘钻孔周围瓦斯流动的数值模拟

应用多孔介质渗流力学理论,建立掘进工作面边抽边掘瓦斯抽放钻孔数学模型,并进行数值计算模拟及分析,为现场施工提供了依据.     

地震属性技术在处理解释一体化中的应用

随着地震勘探技术的发展,三维地震勘探精度不断提高,但在收集分析后期钻探对地震成果验证情况时,发现实际勘探过程中小断层时有遗漏。综合诸多实例,分析了传统地震资料处理解释流程的不足,在模型正演和模拟结果的属性分析的基础上,结合勘探实例,得出属性技术可以直观反映小断层但并不绝对的结论,且属性成果难以全面解释断层要素,提出将属性异常作为处理改善的目标体,进行处理解释一体化,提高地震数据解释小构造的准确性及精度。     

Low CO2 emission technologies for iron and steelmaking as well as titania slag production

The world wide discussion on climate change caused by CO₂ and other greenhouse gases (GHGs) attributable to human activities has put the focus on the energy intensive production technologies for iron and steelmaking. Taking into account the enormous production increase for these versatile materials in the last years, modern technologies with lower CO₂ and GHGs emissions are imperative to keep at least today’s status, though a decrease is challenged.Outokumpu Technology has developed direct reduction technologies that allow in combination with smelting reduction processes or electric arc furnaces a substantial lowering of CO₂ emissions.In the presented contribution to MMME 06 three examples will be given:The Circofer^® process, already demonstrated in pilot plant scale, uses coal as reductant in a two stage CFB (circulating fluidized bed)/FB (fluidized bed) reactor configuration to obtain a highly metallized product suitable for charging into smelting processes.One possible application of Circofer is, in a single stage configuration, as prereduction unit in combination with HIsmelt^®, a smelting reduction technology to produce hot metal using iron ore and coal fines. Using Circofer as prereduction step, the capacity of a given HIsmelt installation can be increased by the factor three to four compared to cold feed and CO₂ emission can be lowered to values about 20% below the standard of a modern blast furnace, as this combination of technologies requires no agglomeration plant or coke ovens.A second application of Circofer is the combination with an electric arc furnace (EAF) to produce steel directly from direct reduced iron (DRI). The direct charging of metallic fines into an EAF was successfully tested, observing no increased dust emission from the furnace. Charging hot DRI into an EAF decreases drastically electric power consumption and thus further lowers CO₂ emission.Applying Circosmelt, the combination of a single stage Circofer system with an electric reduction furnace for ilmenite processing, only half of the electric power consumption required today for titania slag production using cold, unreduced feed material is required.A common additional advantage of all Circofer based routes is that a 99% pure CO₂ stream is removed for process reasons from the process gas and can be used for enhanced crude oil production or sequestration methods.The paper will report on the status of the different developments and its market introduction.Outokumpu Technology GmbH (formerly Lurgi Metallurgie) has been involved in the development, design and supply of plants for processing iron bearing ores in fluidized bed reactor systems for more than 30 years.