Effect of Carbon Dissolution Reaction on Wetting Behavior between Liquid Iron and Carbonaceous Material
Effect of Carbon Dissolution Reaction on Wetting Behavior between Liquid Iron and Carbonaceous Material
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DOI：
10.2355/isijinternational.55.1252
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发表时间：
2015-01-01
影响因子：
1.8
通讯作者：
Kunitomo, Kazuya
中科院分区：
文献类型：
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作者：
Ohno, Ko-ichiro;Miyake, Takahiro;Kunitomo, Kazuya
低碳操作对软熔带周围的液体渗透性不利，因为液体体积将相对于其中的固体焦炭而增加。为了保证该项技术的健康运行，必须正确认识铁液与焦炭之间的润湿行为信息。然而，由于铁与碳质材料之间的活性反应的润湿性测量存在许多困难，因此没有足够的关于它们之间润湿行为的信息。采用熔液进样的座滴法测量了1 673 K下铁液与碳质材料之间的润湿行为，在测量开始前排除了样品之间的反应。以石墨和氧化铝的混合粉末为原料，在1873 K下热压制备了碳质材料基体。从结果中，揭示了以下知识。碳不饱和铁液接触角初期为110 ° ~ 120 °，后期为85 ° ~ 100 °。结果表明，铁与碳质材料之间的反应对它们之间的润湿行为有明显的影响，因为反应过程中降低了界面能。基体中的混合氧化铝粉阻止了铁样品在碳质材料上的润湿行为，使其表观恒定接触角由115 °变为130 °。氧化铝粉末不仅影响铁与碳质材料的润湿行为，而且影响铁与碳质材料之间的反应。
A low carbon operation is an unfavorable situation for liquid permeability around cohesive zone, because liquid volume will increase against solid coke in there. In order to keep a healthy operation with this technique, information of wetting behavior between liquid iron and coke should be correctly understood. However, there is not enough information about wetting behavior between them, because of many difficulties about wettability measurement from an active reaction between iron and carbonaceous materials. In this study, a sessile drop method with molten sample injection system was applied to measurement of wetting behavior between liquid iron and carbonaceous material at 1 673 K for excluding reaction between samples before starting measurement. Carbonaceous material's substrates were made from mixture powder of graphite and alumina by hot press at 1 873 K. From the results, following knowledge was revealed. Molten iron samples un-saturated with carbon showed bigger values of contact angles, 110 degrees-120 degrees, at initial stage, than apparent constant values of them, 85 degrees-100 degrees, at latter stage. It indicated a reaction between iron and carbonaceous materials had obvious effect on wetting behavior between them due to decrease an interfacial energy during the reaction. Mixed alumina powder in the substrate prevented to wetting behavior of iron sample on carbonaceous materials, and they changed their apparent constant contact angles from 115 degrees to 130 degrees. The alumina powder had effects on not only wetting behavior but also reaction between iron and carbonaceous materials.