共查询到20条相似文献,搜索用时 143 毫秒
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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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本文对兴隆庄气煤的煤质特性进行了分析,与在用的康庄、官庄1/3焦煤进行了比较,并在邯钢7m焦炉进行了配用实践,使用效果良好,焦炭质量保持了稳定,配煤成本得到了降低。 相似文献
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为优化焦炭质量,拓宽炼焦煤资源,降低配煤成本,通过煤质分析及40 kg小焦炉炼焦试验对布坎南煤和国内山西柳林地区优质焦煤进行了全面的分析和比较。通过优化配煤,弥补了布坎南焦煤热强度低的缺点,提高了焦炭质量,降低生产配煤成本13. 35元/t。 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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在南钢40kg实验焦炉开展配加非炼焦煤炼焦实验,研究了在配煤中添加煤粉改性剂(zzz)对配合煤、焦炭质量的影响。采取不同配量的改性剂添加方案进行配煤炼焦实验,通过实验确定出最佳配煤方案:非炼焦煤配加量达到15%(粒度小于3mm),煤粉改性剂添加量为0.10%。最佳配煤方案中添加改性剂与未添加改性剂炼出的焦炭质量相比,灰分、硫分基本保持不变,抗碎强度M40增加14.35%,耐磨强度M10下降6.00%,反应性降低5.5%,反应后强度提高5.93%,实验结果表明:焦炭冷态强度与热态性能指标均接近于南钢生产配煤焦炭质量。 相似文献
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对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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The maximum possibility of utilizing the Indian coking coals and inferior grade coking coal for producing metallurgical coke through non-recovery stamp charging technology was investigated.Indian indigenous coals contained low percent of vitrinite(50%)and higher content of ash(15%)compared to imported coking coal.Therefore,the selection of appropriate proportion of different types of coals was a major challenge for coke makers.Coal blend selection criterion based on a single coefficient,named as composite coking potential(CCP),was developed.The use of increased proportion of semi-soft coal(crucible swelling number of 2.5)and high ash(≥15%)indigenous coal in the range of 20%-35%and 20%-65%respectively in the blends resulted in good quality of coke.Plant data of a non-recovery coke oven were used for developing and validating the model.The results showed that the coke strength after reaction(CSR)varied in the range of 63.7%-67.7%and the M40value was between 81.8and 89.3in both the cases. 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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介绍了国内部分地区10种炼焦煤及6种澳洲煤的特性,通过对镜质组平均最大反射率、岩相组成、硫含量、磷含量、灰成分催化系数、流动度、奥亚膨胀度等单种煤性质的测定及单种煤炼焦试验,对比澳洲煤与国内煤差异,通过比较发现,对焦炭质量有积极贡献的指标澳洲煤大多优于国内煤。 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