汾西矿业洗煤厂炼焦配煤技术研究与行业展望

阐述了汾西矿业洗煤厂炼焦配煤过程及技术,通过理论、实践及数据等方面对配煤过程进行了全方位分析研究。汾西矿业洗煤厂利用自身拥有的洗选资源、仓储资源、铁路资源和技术力量,结合集团公司整体规划和市场形势,先后开展了原煤配煤入选和精煤配煤销售等工作,创建了“晋柳王”品牌和“汾矿洗煤厂焦精煤”商标,不仅创造了经济效益,更重要的是通过配煤节约了稀缺炼焦煤资源,取得了社会效益,为集团公司的发展做出了贡献。结合炼焦配煤现状及智能化的发展,对行业发展进行了展望。     

汾西矿区炼焦煤小焦炉炼焦试验研究

介绍了汾西矿业集团现有炼焦煤煤质情况,通过小焦炉试验,研究了各单种煤及配煤作为炼焦用煤的结焦性能,为合理利用本集团炼焦煤资源、科学配煤提供了依据。     

合理配煤入洗获取最大效益的探讨

汾西矿业集团公司为适应市场需求,合理利用资源,需对各矿各煤层不同灰分、不同硫分的煤进行配比入洗,以调整产品结构,合理利用现有资源,提高煤矿的经济效益;提出了三种可行的配煤入洗方案,并分析比较了各方案的经济效益。     

汾西矿业集团建设精煤配煤系统的探讨

介绍了汾西矿业集团公司煤炭资源概况、地理位置及煤质特性 ,针对高、低硫煤的特点 ,分析了实施精煤配煤的必要性 ,提出了几种精煤配煤系统的方案 ,认为在介休选煤厂建设精煤配煤系统是实现集团公司煤炭资源有效利用和利润最大化的合理可行方案     

合理利用资源 调整产品结构

针对汾西矿业 (集团 )公司目前实际生产情况和市场要求 ,为适应经济运行规律 ,提高经济效益 ,调整产品结构 ,对双柳矿精煤和中煤与柳湾矿高硫精煤和电煤分别在王家会站台和柳湾矿储煤场的合理配煤 ,提出了可借鉴的方法。     

配煤优化资源的效益分析

为了合理利用煤炭资源,实现经济效益最大化,需对现有资源进行合理配置,以满足炼焦及电力行业应用。阐述了汾西煤炭资源的特点,针对汾西矿业煤炭资源的具体特点,举实例对配煤销售的经济效益进行了分析。     

高硫煤在炼焦配煤中的应用

我国高硫煤资源丰富,且多为粘结性好的焦、肥煤;为了降低炼焦原料成本,越来越多的焦化厂开始配用高硫焦煤或高硫肥煤进行配煤炼焦。本文结合炼焦工业发展概况,综述了高硫煤在炼焦配煤中的应用进展,以资对合理利用高硫煤配煤炼焦提供参考。     

东庞煤矿高硫煤配煤炼焦的研究与应用

东庞煤矿9号煤资源丰富,为高硫气肥煤和肥煤,黏结性很好,适当降硫就可用于炼焦配煤,此品种在周边用户群中有一定的需求。通过对东庞矿区的2号煤和9号煤进行配煤、煤质分析、40 kg焦炉炼焦实验等,研究配煤指标变化和成焦性能。镜质组最大反射率实验结果表明：配煤具有煤种的单一性,其工业性质及黏结性等指标具有近似的数学加权性,通过配煤入洗可以实现高低硫资源煤质指标互补。将研究成果用于指导实际生产,改造东庞矿洗煤工艺,新建东庞矿西庞井选煤厂,实现高硫煤的全部配煤入洗,生产出满足市场需求的中高硫气肥煤品种,扩大了炼焦资源和高硫煤用途,提高了企业经济效益。2011年生产高硫精煤111万t,直接增加收入1.5亿元。     

介休选煤厂配煤中心技术改造

汾西矿业集团选煤厂配煤中心存在数据传输信号误差大、给煤量不稳定等问题,技改后采用光纤传输数据,优化了配煤程控系统,设置了空气炮自动控制装置,有效提高了配煤效率,满足了客户需求。     

高硫煤在配煤炼焦中的利用

探讨了高硫煤在配煤炼焦中的有效利用。试验结果表明，高硫煤在配煤中占２５％￣４０％可以炼制合格的冶金焦。     

Molecular components of coal and coal structure

A high-volatile bituminous coal was extracted at room temperature by various organic solvents. The yields of the extracts ranged from 4.5 wt% daf (ethanol/benzene extract) to 38 wt% daf (pyridine/ethylenediamine extract). The extracts were analysed by Fl mass spectrometry; the volatile part (75–80 wt%) was composed of substances of molecular weight in the range 70–800 amu, but the compounds in the 200–600 amu range predominated. Over 300 compounds were identified by high-resolution mass spectrometry. The results indicate that compounds < 800 amu constitute at least 30 wt% daf of the analysed coal.     

Differences between mineral coal and extracted coal

A distinction is proposed between mineral coal and extracted coal. Mineral coal is a complex natural composite that is found in underground beds, while extracted coal is created from mineral coal in working those beds. It is important to keep in mind that mineral coal is created by natural processes, whereas extracted coal is produced by human activity.     

Electrical conductivity of coal and coal char

The electrical conductivity of coal, at either 1 kHz or d.c., was measured at 24 °C on samples recovered from pyrolysis experiments aimed at modelling conditions during in situ gasification of coal. From an initial value of 10⁻³ S/m (when the coal is saturated with formation water), the conductivity decreases to 10⁻⁸ S/m when the coal is heated to 110 °C in vacuum. This low value, presumably due to dehydration of the coal, prevails for samples heated as high as 500 °C in dry argon. Samples of char recovered after pyrolysis to 800 °C or more have a conductivity of 10² S/m. Capitalizing on the large contrast between the conductivities of coal and char produced during gasification, electrical probing may be a sensitive tool for monitoring ‘burn-front’ progress during in situ coal gasification.     

澳大利亚煤代替西曲焦煤的配煤炼焦研究

对澳大利亚煤和国内6种单种煤进行煤质分析和配煤炼焦实验,分析澳大利亚煤代替西曲煤进行炼焦的可行性。结果表明澳大利亚煤具有低灰低硫、高挥发分等特点,在炼焦中用澳大利亚煤替代西曲焦煤可降低焦炭的灰分和硫分,增大焦炭的各向异性指数,改善焦炭强度。     

Industrial coking of coal batch without bituminous coal

For many years, Kuznetsk-coal batch has always included bituminous coal. Depending on the content of such coal, the batch may be characterized as lean, moderately clinkering, or bituminous. This classification was adopted by specialists of the Eastern Coal-Chemistry Institute (ECCI) in experimental coking at Magnitogorsk Metallurgical Works in 1945 [1]. Lean batch contained 10% Osinovsk bituminous coal (plastic-layer thickness y = 13 mm); moderately coking coal contained 25% bituminous coal (y = 16 mm); and bituminous batch contained 40% of such coal (y = 20 mm).     

黏结煤与不黏煤共热解特性研究

为了利用内构件反应器热解技术实现黏结性煤的高值化利用,采用TG-MS和固定床反应器研究了黏结的山西兴县煤(简称XX煤)与不黏的先锋褐煤(简称XF煤)共热解时的破黏和热解特性。TG-MS实验结果表明,XX煤与XF煤配制的混合煤比XX煤黏性小,且XF煤促进了XX煤热解,混合煤热解行为是两种煤共同作用的结果。固定床热解实验表明,煤粒径越小,降黏越显著;XX煤和XF煤的比例(XX:XF)越小,降黏越显著,XX:XF小于5:5时,可消除结焦团块;XX:XF越小,半焦产率越低,焦油和煤气产率越高;随XX:XF减小,焦油中<170℃和230~300℃的馏分含量先升后降,XX:XF=6:4~3:7时最高,170~210℃、210~230℃和300~360℃的馏分逐渐增加,>360℃的馏分含量不断降低;随XX:XF的减小,H2含量先升高后降低,在XX:XF=3:7时最高;CO含量呈略微升高趋势;CO2含量先逐步升高,在XX:XF=6:4达到最高,然后从XX:XF=5:5开始降低,在XX:XF=3:7达到最低,然后又开始升高;CH4及C2~C3组分含量呈下降趋势,而H2+CO+CH4 (煤气中有效组分之和)的含量先下降再升高接着再降低,在XX:XF=6:4时最低,XX:XF=3:7时最高。XX:XF越小,虽半焦的C/N和C/H不断减少,但C元素含量增幅和N, H元素含量减幅增大;比表面积越大,内孔结构越多越大,起燃温度越低,燃烧越彻底。     

煤岩学在炼焦配煤中的应用进展及优化配煤技术

科学合理的配煤技术对于焦化企业高质量发展至关重要,炼焦配煤技术的核心在于对原料煤煤质特性的深入认知。影响炼焦煤性质的主要因素包括变质程度、煤岩组成及第三成因因素,故煤岩学对炼焦配煤技术的研究与应用至关重要。本文论述了经验配煤、煤岩配煤及人工智能配煤3种炼焦配煤技术发展历程和现状,凝练了炼焦配煤技术的发展趋势。结合研究实际,重点梳理了煤岩学指标在炼焦配煤中的应用现状。在注重煤岩特征的同时,也需兼顾工艺指标等相关参数对炼焦煤优劣的表征。在实际应用中,各项指标参数的选择和利用需要综合考虑参数适配范围并尊重该指标与炼焦煤特性的真实对应关系。基于以上内容,提出了关联成煤时代、产地等地质因素和黏结指数、胶质层指数等工艺指标的整体思路,实现焦炭性能与原料煤特性的科学、深入关联,构建“本源-过程-结果”一体的优化配煤技术新体系。     

高硫焦煤在配煤中的应用

通过研究高硫焦煤的理化性质,在配合煤中配入一定比例的廉价高硫焦煤,焦炭质量得到改善,主焦煤的使用比例减少,入炉煤成本大幅降低.     

关于混煤的配煤探讨

针对生产用煤多为复杂混煤的不利情况,在常规分析数据的基础上利用岩相分析手段指导配煤,有效稳定了焦炭质量,明显改善了焦炭的热态性能。     

Coking properties of coal pitch in coal batch

The coking properties of coal pitch depend significantly on its fractional composition, which determines the set of structural components involved in meso-phase formation. The optimal combination of high-molecular aromatic compounds, polycyclic compounds of intermediate molecular mass, and hydrogen-donor hydroaromatic components corresponds to a ratio of pitch fractions α: β: γ = 1: 2: 2. This is typical of coal pitch with a softening temperature of 75–85°C. Such pitch is the best clinkering additive to coking batch, resulting in the production of coke of maximum strength.