改善兰炭热态性能与研究.pdfVIP

改善兰炭热态性能研究 1 1 1 2 2 2 朱子宗 李 硕 徐 军 贾志强 马小文 王 军 （1. 重庆大学材料科学与工程学院，重庆 400044 ；2. 陕西省神木县产业办，榆林 719300 ） 摘 要 针对兰炭的特点和应用现状，探索用于高炉炼铁的前景。采用兰炭改性材料（ZBS ）,对其热态性能进行改 性，借助 GB/T4000—1996 标准测定其热态指标变化。试验结果表明，兰炭经 5%～12%的ZBS 溶液处理后，CRI、 CSR 明显改善。在ZBS 浓度 8%～10%，CSR 达到 50% 以上；同时发现兰炭的抗压强度提高显著，预示在高炉内承 载能力增加；通过 SEM 检测发现，经 ZBS 处理后，兰炭的微观结构发生结构性变化，孔壁增厚，石墨化程度提高； 通过 ZBS 溶液处理后的兰炭可以代替焦丁用于 400m3 高炉炼铁生产。 关键词 兰炭 改性材料 热态性能 抗压强度 Research on Improving the Thermal Property of Semi-coke Zhu Zizong1 Li Shuo1 Xu Jun1 Jia Zhiqiang2 Ma Xiaowen2 Wang Jun2 （1. College of Material Science and Engineering, Chongqing University, Chongqing, 400044； 2.The industry development department of Shenmu, Yulin, 719300 ） Abstract For exploring the prospects of semi-coke used in the blast furnace in the future, Experimental investigation has been carried out on the influence of modified materials on semi-coke quality by the criteria of GB/T4000-1996. It has been found through spraying 5% ～12wt% ZBS solution, the CRI and CSR are improved obviously respectively. The CSR can reach to 50%when ZBS solution concentration are 8%～10%.The compressive strength of semi-coke are increased significantly, which represents the load-bearing capacity increases in blast furnace. Compared with that without adding ZBS, Microstructure of semi-coke detected by SEM has been changed, which improves thickness of pore wall and degree of graphitization of carbon. This semi-coke treated by ZBS solution can replace nutcoke for 400m3 blast furnace. Key words semi-coke, modifying materials, thermal property, compressive strength 随着我国钢铁企业的迅猛发展，焦炭的需求缺口越来越大，开发焦炭的替代品显得非常重要。兰炭(又 称半焦)是利用神府煤田盛产的优质侏罗精煤块烧制而成的，结构块状，颜色浅黑色。以其固定炭高、比电 阻高、化学活性高、灰分低、硫低、磷低、铝低等“三高四低”