共查询到19条相似文献,搜索用时 125 毫秒
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针对配煤比变更后导致的推焦电流波动,分析配煤结构对捣固焦炉推焦电流的影响。在当前加热制度下,要保证推焦电流稳定,配合煤应按如下指标控制:挥发分≤26.1,黏结指数≥66.9,煤饼收缩度≥7mm。 相似文献
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对价格较低的高硫气肥煤进行了工业分析、煤质分析、岩相分析和40 kg小焦炉试验,并将其用于配煤炼焦。结果表明,高硫气肥煤部分替代肥煤炼焦是可行的,将其应用到生产实践,焦炭质量得到了保证,同时降低了配合煤成本。 相似文献
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为缓解低灰、低硫焦煤与肥煤资源紧张现状,稳定焦炭生产,公司引进了北美焦煤与肥煤。通过开展单种煤煤质与炼焦特性、配煤炼焦试验研究,分析了配合煤煤质与焦炭质量的相关性关系。结果表明:北美焦煤与肥煤具有低灰、低硫的优质特性,但其热性质相对国内同类煤种差,其参与的配煤结构中配合煤的挥发分、黏结指数及灰成分指标,均与焦炭的机械强度、热性质具有较高的线性拟合度,均大于0.80。通过优化配煤结构,在7m顶装焦炉中应用北美焦煤或肥煤的比例可达8%~12%,并可稳定生产出CSR约为67.5%与CSR约为70%的合格焦炭。 相似文献
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胶质层指数是判断烟煤结焦性能的一项重要指标。国家标准用Y值作为烟煤分类中区分肥煤和非肥煤的主要指标。由于用Y值表征煤的结焦性能,并有较好的可加性,所以对指导配煤炼焦有重要的作用。胶质层指数测定方法是模拟工业焦炉条件而设计出来的,能近似反应工业炼焦过程。煤样装在煤杯中,上加恒压,由杯底单侧加热,在煤杯中形成一系列自下而上递减的等温面,按半焦、胶质体、煤样依次分布。 相似文献
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为实现淮南矿业煤资源的合理高效利用,分析了淮南矿业典型的3种1/3焦煤的煤质及炼焦特性,介绍了其在顶装焦炉和捣固焦炉炼焦生产中的应用实践情况。生产焦炉实践证明:淮河一号为优质1/3焦煤,可作为主力1/3焦煤大比例使用,其煤质特征兼具肥煤特性,也可部分替代肥煤使用,焦炭质量维持稳定;淮河二号挥发分偏高,具有较好的黏结性和流动性,在捣固焦炉中可作为1/3焦煤大比例配用;淮河三号1/3焦煤具有低灰、低硫特性,在配煤炼焦中主要起到降灰、降硫作用,可大比例配用生产高品质低灰低硫焦炭。 相似文献
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为稳定改善6m焦炉焦炭质量,以20kg小焦炉试验、岩相检测、焦炭反应性和反应后强度检测为主要试验手段,对现用气煤、1/3焦煤、焦煤、低硫肥煤、高硫肥煤、瘦煤等煤种作了配煤炼焦试验,优化了配煤结构。并从经济效益出发,在保证焦炭强度的条件下,提高了气肥煤配量,进一步优化完善了6m焦炉的用煤结构,年新增效益700多万元。 相似文献
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在配合煤中添加不同比例的煤沥青,进行了40 kg小焦炉试验,确定了煤沥青最佳配入比例为3%;在此基础上,在保证焦炭质量的前提下,确定了改质沥青配入量为3%的工业焦炉试生产配煤方案。大容积顶装焦炉工业试生产结果表明,配入适当比例的沥青,在焦煤和肥煤总配比减少、贫瘦煤和不黏煤增加的情况下,可有效保证焦炭质量,拓宽炼焦煤资源,具有较好经济效益。 相似文献
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10%~15%的澳大利亚气肥煤配合云南昭通地区10%的无烟煤,并以云南和贵州地区的焦煤作基础煤进行捣固炼焦,在提高煤气发生量的同时对焦炭的机械强度没有产生较大的影响,提高了化产品的回收率和甲醇的产量,取得了较好效果。 相似文献
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Coals may be blended at mines to meet contractual criteria set by the client. In formulating a blend, the criterion that is hardest to meet is often the handlability because it is difficult to predict. Most research on coal handling treats coal handlability as a property to be measured for a given material, and there appear to have been very few attempts to predict the consequences of blending choices, or to use such information to optimise coal blends for the different contractual requirements. This paper presents what is believed to be the first study to explore the causal relationships in coal blending, to use these to predict the handlability of a blend, and to establish the basis needed to optimise blending choices. The ultimate goal of this work is an algorithm that can be used in on-line real time choices in coal blending operations, either at mines or at power stations. 相似文献
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在对神府长焰煤基础性质研究的基础上,基于现有配煤方案,通过添加神府长焰煤替代部分1/3焦煤和气煤进行配煤炼焦试验,结果表明,在增加肥煤配比时可以用长焰煤替代部分1/3焦煤和气煤,有利于降低焦炭的硫分和灰分,扩大炼焦煤资源,降低配煤成本。 相似文献
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Enhancement of combustion efficiency with mixing ratio during fluidized bed combustion of anthracite and bituminous blended coal 总被引:1,自引:0,他引:1
Jeong-Gook Jang Mi-Ran Kim Ki-Ho Lee Jea-Keun Lee 《Korean Journal of Chemical Engineering》2002,19(6):1059-1065
In order to investigate the effect of mixing ratio of bituminous coal to blended coal on the enhancement of combustion efficiency,
combustion experiments of blended coal with anthracite and bituminous are done in a laboratory scale fluidized bed combustor
(10.8 cm ID and 170 cm height). The gross heating values of anthracite and bituminous coal used in this study are 2,810 cal/g
and 6,572 cal/g, respectively. Experimental parameters are fuel feed rate, superficial gas velocity and mixing ratio of bituminous
coal to blended coal. The combustion efficiency increases with the mixing ratio of bituminous coal due to the lower unburned
carbon losses and higher burning velocity of bituminous coal. The rate of combustion in the combustor was increased with mixing
ratio resulted from a higher burning velocity of bituminous coal. The measured combustion efficiency experimentally is about
3.5-12.4% higher than that of the calculated value based on the individual combustion of anthracite and bituminous coal under
the same operating conditions. The optimum mixing ratio (MR) of bituminous coal determined is around 0.75 in this study.
This paper is dedicated to Professor Dong Sup Doh on the occasion of his retirement from Korea University. 相似文献