共查询到17条相似文献,搜索用时 109 毫秒
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根据国内期刊有关煤的基氏流动度的文献,介绍了煤的胶质体流动度的测量原理、方法和影响因素,重点介绍国内有关基氏流动度的研究现状,即基氏流动度指标在4个方面的应用情况,最后对我国开展基氏流动度的研究方向进行了展望。 相似文献
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通过探索烟煤基氏流动度指标与最大胶质层厚度Y、粘结指数G、奥亚膨胀度b之间的相关性,揭示了用该指标衡量烟煤塑性的特点。基氏流动度对数值同粘结指数呈线性正相关,同最大胶质层厚度和奥亚膨胀度存在曲线相关关系,回归分析得到4个方程。对于强膨胀性的烟煤,基氏流动度指标能够克服气体膨胀的影响,更真实地反映胶质体的性质。由于能够同时反映烟煤在加热过程中生成胶质体的数量和质量,在一定塑性范围内基氏流动度指标具有优越性。 相似文献
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黏结性和结焦性是评价炼焦煤工艺性质的主要指标。本文评述了国内外表征炼焦煤黏结性和结焦性的几种主要方法,包括黏结指数、胶质层指数、基氏流动度和奥亚膨胀度等研究进展,指出黏结指数、基氏流动度和奥亚膨胀度检测方法采用均相加热温度场,对炼焦煤的单向受热、层层结焦的成焦过程模拟性较差。虽然胶质层指数模拟了这一过程,但设备的自动化是其未来发展的关键。黏结指数只反映炼焦煤本身的性质,与焦炭质量几乎没有相关性;而胶质层最大厚度、基氏流动度和奥亚膨胀度等只能从某个侧面反映炼焦煤的结焦性,如何开发出一种新的检测方法,可同时从胶质体的黏结能力、数量、质量和膨胀性等方面共同表征炼焦煤黏结性和结焦性是未来发展的关键。 相似文献
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李兰英 《金属材料与冶金工程》2012,40(6):35-39
通过对湘钢现有炼焦煤进行评价,应用炼焦煤成焦焦炭显微结构技术、基氏流动度技术、奥亚膨胀度技术、胶质层指数特征技术、煤岩技术等,全面分析评价了各矿点炼焦煤质特征,指导炼焦煤细分类。 相似文献
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《钢铁冶炼》2013,40(6):416-420
AbstractThe blast furnace coke quality depends on the characteristics of coal blend, precarbonisation techniques adopted such as stamping, vibrocompaction etc., and coking conditions. Of the above, coal blend plays a significant role in the production of quality coke. Furthermore, the quality of the blend depends on the quality of individual coals and their interaction making up the blend. Coal, being a highly heterogeneous material, requires special care for determination of its properties and blending of individual coals for coke making. Coal fluidity is one such important coking property which highly influences the coke quality. The hard coking coals having good fluidity, which yield good coke, however are not only very expensive, but also are limited in reserves. Unlike, other properties, coal loses its fluidity on weathering, i.e. oxidation in presence of air on long storage in the yard, and the fluidity value changes on blending with different coals. To understand the effect of coal fluidity on coal blending and there by the coke quality, studies have been conducted using the industrial scale coals and coal blends. An empirical relation has been developed between actual blend fluidity and calculated fluidity using logarithmic weighted average from fluidity of individual coals. Blending of non-coking coals above 20% with the hard coking coals used in this research decreases the blend fluidity and impairs the coke quality. It was seen that the coals lose their fluidity on weathering, and the value becomes less than half after a two months of storage at site. Weathering appears to be more rapid in case of semisoft than hard coking coals. The present paper discusses the influence of coal fluidity on coal blend fluidity and changes on weathering. 相似文献
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研究了加拿大焦煤和国内常用主焦煤的结焦性差异,有利于国内焦化企业很好地利用加拿大炼焦煤,优化配煤生产。对加拿大煤和国内常用焦煤进行常规煤质分析和煤岩特征分析,探寻了二者黏结性存在差异的原因,并利用40 kg小焦炉进行加拿大焦煤替代国内优质焦煤实验。研究表明:与国内主焦煤相比,加拿大焦煤的单一性较好,灰分较低,变质程度较低;加拿大煤的基氏流动度lgMF和奥亚膨胀度[b]值较低,均质镜质组较少,且镜质组中含有较多裂纹和气孔,造成加拿大焦煤在成焦过程中熔融阶段流动性较小,膨胀压力较小;加拿大焦煤替代国内优质炼焦煤进行配煤炼焦,可以稳定焦炭质量。 相似文献
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最大喷煤量与焦炭质量问题 总被引:3,自引:0,他引:3
讨论风口喷粉的极限量以及与提高喷煤量相关的焦炭质量问题,并预测了随喷煤量提高焦炭劣化的演变程度以及使用上前优质焦炭能够达到的最大喷吹量。也提出了缓解焦炭劣经的措施。 相似文献
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为研究不同粒度焦粉做配合煤瘦化剂时对焦炭质量的不同影响,通过加入相同配比不同粒度焦粉炼焦试验,分析了实验中对焦炭冷热强度的影响,找到了保证焦炭质量的配入焦粉粒度的最优值。 相似文献