共查询到19条相似文献,搜索用时 253 毫秒
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为进一步提升焦炭的质量以保证其更加适用于炼钢等行业,从实验方案、实验方法以及分析方法三个层面完成了实验设计;对捣固炼焦与常规炼焦工艺所得焦炭的耐磨强度、抗碎强度、反应性以及反应后强度进行对比;其次,对不同原煤参数对所得焦炭的气孔率、耐磨强度、抗碎强度、反应性以及反应后强度进行对比。本次研究为捣固炼焦在我国范围之内的推广应用奠定基础。 相似文献
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通过20kg小焦炉实验,探讨了在相同炼焦温度和同一配煤比条件下,结焦时间对焦炭质量的影响。结果显示,适当延长结焦时间能有效地提高焦炭的抗碎强度和反应后强度,而焦炭的耐磨强度和反应性明显降低,并从微观角度解释了焦炭质量变化的原因。建议在生产条件允许的情况下,应适当延长结焦时间,可以改善焦炭的冷热态强度。 相似文献
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为进一步提升焦炭质量,使其更加广泛应用于炼钢的其他行业,在对焦炭光学组织微观结构和焦炭质量测定的基础上,重点对焦炭光学组织与焦炭冷态强度和热态强度之间的关系进行研究,得出可通过增加焦炭中的镶嵌组织和丝炭、破片状组织等提升其质量,为实际焦化生产中的配煤提供指导。 相似文献
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In the recycling process of waste plastics using coke ovens, coals and added plastics are carbonized and changed into coke, tar, oil and coke oven gas in a coke oven chamber. In this study, the effect of added plastic size on coke quality and the effect of plastic addition on coking pressure was investigated. In the case of a plastic addition rate of 2%, the coke strength reached a minimum at the particle size of 10 mm for polyethylene (PE) and 3 mm for polystyrene (PS). The mechanism was attributed to the weak coke structure formed on the interface between plastic and coal. The result indicates that large or small plastic particles are favorable in order to add waste plastics to blended coals for coke making without affecting coke strength . Furthermore, it was also shown that a 1% addition of large size agglomerated waste plastics to blended coals did not increase coking pressure. Based on this fundamental study, and considering the ease of handling plastics, we have determined that the size of waste plastic used in a commercial-scale recycling process of waste plastics using coke ovens is about 25 mm. Nippon Steel Corporation started to operate a waste plastic recycling process using coke ovens at Nagoya and Kimitsu works in 2000 and at Yawata and Muroran works in 2002. Now the total capacity is 120,000 tons per year as of 2003 and this process is operating smoothly. 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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An approach to blast furnace coke quality prediction 总被引:3,自引:0,他引:3
Although coke cold drum mechanical strength has historically been the most relevant coke quality parameter, currently coke reactivity and post-reaction strength (CRI/CSR) are the most important parameters used to assess blast-furnace coke quality. Many models of coke quality prediction have been proposed, most of which are based on coal characteristics and limited to the same coal geographic origin, but as yet there is no universally applicable prediction formula. The present work describes a simple model of coke CRI/CSR prediction based on the assumption that the CSR of a coke produced from a blend of coals can be predicted from the CSR obtained from the cokes of the individual coals through the application of the additivity law. The additivity law was also applied to the coke cold mechanical strength indices derived from the Irsid test, which are widely employed by the European coke industry as complementary coke quality indicators. 相似文献
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炼焦机理和焦炭质量预测的研究进展 总被引:2,自引:0,他引:2
综述了煤的热塑性、炼焦机理和焦炭质量预测的研究进展。煤的化学结构如煤中镜质组的烷基侧链和移动氢的含量决定了煤的热塑性,核磁共振、质子磁共振热分析、拉曼光谱和电子顺磁共振谱等从分子水平解释煤的热塑性、配合煤的相互作用和炼焦机理。塑性成焦机理认为,良好的氢传递和分子重排是炼焦中获得优质焦炭的重要条件,塑性成分在焦炭光学组织形成中非常关键,改变加热速率可使煤的光学组织形成机理改变。碱度指数(modified basicity index,MBI)、复合焦势(composite coking potential,CCP)和组合煤指数(combined coal index,CCI)等参数可精确地预测焦炭反应后强度和焦炭反应性。矿物质对焦炭强度的影响是研究热点,控制焦炭的裂纹和尺寸是未来焦炭质量的要求。 相似文献
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