04MnO对连铸保护渣非等温结晶动力学的影响91

04MnO 对连铸保护渣非等温结晶动力学的影响 91雷云 1 谢兵 1* 齐飞 2 刁江 1 (1、重庆大学材料科学与工程学院，重庆，400044； 2、中冶京诚工程技术有限公司，北京，100176)摘要：爱护渣对铸坯与结晶器之间的润滑起着至关重要的作用，爱护渣结晶性能直截了当决定着它的润滑性能。本文通过 DSC、XRD 等讨论爱护渣的非等温结晶动力学。结果讲明：随着 MnO 含量的增加，其作用要紧表现为抑制爱护渣枪晶石( Ca4SiO7F2) 的析晶，但同时相伴有少量钙黄长石 (Ca2Al(AlSiO7) 、氧化锰钙 (CaMn7O12)等晶体的析出。此外，MnO 对爱护渣结晶时刻的阻碍为，MnO 含量越高，晶体析出的时刻越长。关键词：爱护渣；DSC；非等温结晶动力学；析晶活化能；XRDEffect of MnO on Nonisothermal Crystallization Kinetics of Mold Fluxes LEI Yun 1, XIE Bing 1*, QI Fei 2, DIAO Jiang 1 (1. College of Materials of Chongqing University, Chongqing, 400044; 2. Capital Engineering & Research Incorporation Ltd. Beijing, 100176 ) Abstract: In continuous casting of steel, mold fluxes play important roles in the lubrication between casting strand and mold, and the lubricative ability of mold flux is mainly decided by the crystallization properties. Effect of MnO on mold fluxes nonisothermal crystallization kinetics properties was investigated by DSC and XRD. The result indicated that, with MnO addition increasing, precipitation of cuspidine in the mold fluxes was restrained. However, a few of crystals such as Ca2Al(AlSiO7) and CaMn7O12 were precipitated at the same time. In addition, with MnO addition increasing, the period of crystallization was prolonged.Keywords: mold fluxes, DSC, nonisothermal crystallization kinetics, activation energy, XRD1 前言爱护渣的结晶性能对铸坯的质量及粘结漏钢的发生有着专门大阻碍[1-3]。因此如何改善爱护渣的润滑和传热性能，关系到铸坯质量的操纵与连铸生产效率的提高，差不多成为当今世界连铸工作者孜孜不倦讨论的热点咨询题[4-6]。目前针对 MnO 对连铸爱护渣性能的阻碍已有...