摘要
为了提高高炉含钛物料护炉的效果,以现场含钛高炉渣和人工合成含钛炉渣为原料,通过静态坩埚抗渣试验,利用钙平衡法计算渣量的变化,就温度、反应时间、二元碱度等因素对Al2O3陶瓷杯侵蚀的影响及侵蚀机理进行研究。结果表明,提高温度、延长反应时间,含钛炉渣对Al2O3陶瓷杯的侵蚀加剧;增加炉渣二元碱度,侵蚀减缓。含钛炉渣对Al2O3陶瓷杯侵蚀的机理为:在高温熔融状态下,炉渣中的CaO和SiO2会与陶瓷杯原砖层的Al2O3发生反应,生成CA6、C2AS和CAS2等矿物并不断溶入炉渣中,从而使陶瓷杯不断受到侵蚀。在陶瓷杯原砖层附近形成更多的MA和CA2等高熔点矿物,会增大炉渣黏度,进而减缓炉渣对陶瓷杯侵蚀。
In order to effectively protect the hearth lining of the blast furnace by using materials containing titani- um, the corrosion behavior of slags containing TiO2 to Al2O3 ceramic cup was experimentally investigated through slag resistance test in static crucible and calculation of slag quantity by mass conservation of CaO. The effect of temperature, reaction time and slag binary basicity on the corrosion behavior was studied, and the corrosion mech- anism was discussed. The results show that increasing temperature and prolonging reaction time can lead to an in- crease of corrosion of Al2O3 ceramic cup by the slags with TiO2, whereas the corrosion shows a decrease trend with the increase of slag binary basicity. The corrosion mechanism can be summarized as that： CaO and SiO2 in slag will react with Al2O3 from ceramic cup to form CA6, C2 AS and CASe ; the formed CA6, C2 AS and CAS2 will dissolve into slags; some high-melting-point minerals such as MA and CA, near the original brick layer of ceramic cup will be formed to make slag more viscous.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2013年第12期17-22,共6页
Journal of Iron and Steel Research
基金
国家重点基础研究发展计划资助项目(2012CB720401)
国家自然科学基金委员会与宝钢集团有限公司联合资助项目(51134008)
关键词
含钛炉渣
Al2O3陶瓷杯
侵蚀机理
钙平衡法
slag containing titanium dioxide
Al2O3 ceramic cup
corrosion mechanism
method of CaO mass conservation
