共查询到17条相似文献,搜索用时 125 毫秒
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为了扩大炼焦煤源,降低焦炭成本。在配无烟煤炼焦的思路指导下,本文通过对配无烟煤炼焦中无烟煤的热稳定性、可磨性的研究来辅助选用无烟煤,并通过5kg试验焦炉进行无烟煤配煤炼焦试验研究,优化出涟钢配无烟煤炼焦的无烟煤的最佳粒度与最佳配量。同时比较了涟钢现行配煤方案与配无烟煤的焦炭的冷强度,结果表明,配加量为3%-5%和粒度为-1mm的无烟煤,焦炭冷强度提高2%。 相似文献
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为了研究炼焦煤特性对焦炭粒度的影响,对鞍钢常用炼焦煤进行了炼焦试验分析和配煤炼焦试验优化研究,并在配煤炼焦生产中进行了试验应用.结果表明,不同变质程度的炼焦煤对焦炭冷热态指标及焦炭平均粒度指标的影响差异明显.试验条件下,焦煤成焦质量最好,粒度>40 mm的焦炭比例极高、达到90%以上,平均粒度在70 mm以上;调整鞍钢6 m焦炉用配煤方案,配入瘦焦煤10%,降低焦煤配比5%,停用瘦煤,能够使焦炭热态反应性降低2.1%,焦炭平均粒度提高1.8 mm,且焦炭粒度均匀性保持稳定. 相似文献
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介绍了澳大利亚和加拿大炼焦煤的低灰分、中等硫含量等质量特性;马钢小焦炉试验和工业试验结果表明:炼焦配用澳煤可以得到冷态强度较好的焦碳,而配用加煤炼焦具有良好的焦炭热态强度;在配煤炼焦中两者均可替代目前国内主焦煤品种。 相似文献
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时山西省炼焦煤资源和目前焦化行业发展形势进行了简要分析。追溯了太钢焦化厂的配煤历史,结合焦炭质量变化情况。对太钢炼焦配煤结构提出了改进建议。 相似文献
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针对鞍钢鲅鱼圈所处中国东北部港口的独特地理位置特点,建立了适合鞍钢鲅鱼圈的煤岩配煤方法,分析了鞍钢鲅鱼圈配煤方案工程应用中各煤种用煤特点,考察了工程应用配煤方案的煤岩特征,并对应用煤岩配煤方案所得焦炭质量进行了分析,论述了鞍钢鲅鱼圈开展煤岩配煤技术为企业所创造的经济效益。结果显示,鞍钢鲅鱼圈通过煤岩配煤技术的研究开发与应用,使炼焦用煤结构从以肥煤为主向以进口炼焦煤为主、国产劣质炼焦煤为辅的低成本炼焦用煤结构转变,在满足大型高炉用焦质量要求的前提下,不断优化配煤方案,逐步提高焦炭质量,使焦炭的反应性从27.36%下降到24.95%,反应后强度从62.20%提高到65.37%以上。 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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