共查询到18条相似文献,搜索用时 62 毫秒
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本文对本钢5号高炉冶金焦的反应性和反应后强度之间的关系,冷态强度和热态强度之间的关系进行分析讨论,用典型的事例说明冶金焦反应性的反应后强度在高炉冶炼中的重要性,对5号高炉入炉焦的质量要求有一定的参考价值,建议焦炭反应性和反应后强度列入焦炭质量指标。 相似文献
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1 前 言由新日铁公司提出的一种简易的焦炭反应后强度 (CSR)检验方法 ,已逐步在全世界得到采用。与此同时 ,在许多国家 ,尤其是在欧洲 ,对模拟高炉炉况及其对焦炭反应后强度的影响进行了重点研究。2 高炉操作与焦炭反应后强度的关系2 .1 高炉用焦炭的反应后强度焦炭反应后强度标准中的气化条件是反应时间恒定 2h ,在这种条件下 ,焦炭重量平均损失 2 5%~ 30 %。这种恒定反应时间的规定涉及焦炭反应指数 (CRI)与焦炭反应后强度 (CSR)两者的关系 (见图 1 )。图 1 CSR与CRI的关系 (R2 =0 .9)这不能通过高炉鲍氏反应来说… 相似文献
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焦炭的热态性能是评价其在炉内溶损反应程度及抗机械破坏作用的重要指标之一.通过对安阳钢铁1#和2#高炉入炉焦炭的高温反应特性,分别采用块焦法、粒焦法和组织结构法进行了测定,并对所得结果进行了对比,分析了不同测定方法测定结果的侧重点及内在影响因素,给出了粒焦法和块焦法所得结果之间的线性关系;焦炭的矿相显微结构是影响其在高炉内劣化的内部因素,由修正公式可知,片状结构和各向同性与CO2的反应速度较快,镶嵌结构含量高的焦炭,反应后强度较高.由安钢1#和2#高炉所用入炉焦炭的性能分析结果,结合高炉的实际生产情况,提出了改进安钢高炉入炉焦炭高温反应特性的措施. 相似文献
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针对梅山自产焦炭,利用梅山焦炭反应性试验设备,通过改变焦炭块数、CO2流量和温度等控制参数,讨论了这些参数对焦炭反应性和反应后强度检测值的影响,以及保证测定可靠性应采取的控制措施。 相似文献
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根据昆钢铁前系统生产实际及高炉风口焦取样检测结果,提出不仅要重视焦炭的反应性和反应后强度,而且要加强焦炭抗碱性能研究的建议,同时对如何兼顾冶金焦常规性能指标、改善焦炭抗碱性能提出了具体的办法和措施. 相似文献
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ZHU Zi-zong ZHANG Zhu-ming TANG Qi-yong YANG Xue-feng ZHANG Kun-hua ZHAO Xian-sheng 《钢铁研究学报(英文版)》2006,13(3):14-17
In order to improve the thermal properties of coke, an industrial experiment on the coke spraying with ZBS additive solution was carried out at coking plant and No. 6 blast furnace (2 000 m^3 ) of Kunming Iron and Steel Co Ltd. The coke reaction index (CRI) of the coke spraying with ZBS additive solution decreases by 10. 56 %, and the coke strength after reaction (CSR) increases by 7.80% in comparison with those of the un-sprayed coke. During the experiment, the average iron output increases by 66. 69 t/d, and the coke rate is reduced by 5. 21 kg per ton iron, while the fluctuation of furnace temperture is small, and sulphur content in hot metal and 100% of hot metal are acceptable. 相似文献
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国内外关于提高焦炭质量研究的最新进展 总被引:4,自引:1,他引:4
通过新日铁、蒂森*克虏伯、法国索拉克等公司的研究结果,详细介绍了焦炭反应后强度CSR与反应性CRI对高炉操作的影响,介绍了美国钢铁协会确定的高炉对焦炭质量指标的要求,煤的性质对焦炭CSR、CRI等性能的影响以及焦炭稳定性和硬度与高温强度之间的关系、CSR的预测模型、高煤比高炉对焦炭质量的要求和国内外对提高焦炭质量的研究状况等,并分析了鞍钢在焦炭质量方面与世界先进高炉之间的差距. 相似文献
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The present work aims to study the high‐temperature strength of coke. Mechanisms of disintegration were evaluated using basket samples charged into LKAB's experimental blast furnace prior to quenching and dissection. Coke charged into basket samples was analysed with CSR/CRI tests and compared with treated coke from the blast furnace. Results from tumbling tests, chemical analyses of coarse and fine material, as well as light optical microscopy studies of original and treated coke have been combined and evaluated. The results indicate a correlation between the ash composition and the CSR values. Differences in the texture of the coke were noted with light optical microscopy, and a significant change in the coke texture during the CSR/CRI test conditions was found. The results suggest that the main reaction between coke and CO2 took place in isotropic areas, which was especially pronounced in coke with a low CSR. Signs of degradation were apparent throughout the coke pieces that have undergone CSR/CRI testing, but were less observable in coke reacted in the blast furnace. The results indicate that reaction with CO2 is generally limited by the chemical reaction rate in the CSR/CRI test, while in the blast furnace the reaction is limited by the diffusion rate. Coke degradation is therefore mostly restricted to the coke surface in the blast furnace. 相似文献
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对湘钢采用熄焦添加剂提高焦炭质量的试验研究进行了总结分析。工业试验结果表明,与试验前相比,焦炭质量得到明显改善,M_(40)提高1.59%,M_(10)降低0.25%,CRI降低3.82%,CSR提高3.22%;高炉生产指标也明显改善,焦比降低12.29kg/t。 相似文献
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对首钢使用的6种焦炭进行钝化剂处理试验。实验室实验结果表明:几种焦炭试样喷洒钝化剂后,反应性都降低,反应后强度都得到提高,尤其是浓度为3%的钝化剂溶液效果更加明显。工业试验结果表明:焦炭喷洒钝化剂以后,有利于促进高炉顺稳生产、降低焦比。 相似文献
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