摘要
以六铝酸钙、镁铝尖晶石、板状刚玉及镁铬砂为耐火原料,在750℃×3h条件下分别对其进行抗K_2CO_3侵蚀试验,分析其抗K_2CO_3侵蚀性能。结果表明,经过K_2CO_3侵蚀后,六铝酸钙、镁铝尖晶石均能保持原料内部原有的形貌,侵蚀程度较小,其中六铝酸钙原料几乎无侵蚀,所引起的体积膨胀较小;而板状刚玉、镁铬砂与K_2CO_3反应后分别生成低密度化合物K_6Al_2O_6和K_2CrO_4,反应程度大,所引起的体积膨胀较大;六铝酸钙、镁铝尖晶石抗K_2CO_3侵蚀性能优于板状刚玉、镁铬砂。
With calcium hexaluminate,magnesia-alumina spinel,tabular corundum and magnesiachrome sand as refractory raw materials,the corrosion resistance of these materials against K2CO3 were studied under the condition of temperature at 750 ℃ and for 3h.The results show that,after the corrosion by K2CO3,both calcium hexaluminate and magnesia-alumina spinel can keep original internal morphology and have low corrosion degree.Calcium hexaluminate has nearly no corrosion and little volume expansion.But for tabular corundum and magnesia-chrome sand,after reacting with K2CO3,low density compounds of K6Al2O6 and K2CrO4 are generated respectively.It shows an obvious extension of reaction,resulting in a relative large volume expansion.The corrosion resistance performance of calcium hexaluminate and magnesia-alumina spinel against K2CO3 are better than that of tabular corundum and magnesia-chrome sand.
作者
余亚兰
顾华志
张美杰
毛燕东
邵志君
黄奥
Yu Yalan Gu Huazhi Zhang Meijie Mao Yandong Shao Zhijun Huang Ao(State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China State Key Laboratory of Coal-based Low Carbon Energy, ENN Technology and Development Co. ,Ltd., Langfang 065001, China Yixing Furnace Roof Sealing Industry Co., Ltd., Yixing 214225, China)
出处
《武汉科技大学学报》
北大核心
2017年第4期264-268,共5页
Journal of Wuhan University of Science and Technology
基金
国家自然科学基金资助项目(51474165)
关键词
六铝酸钙
镁铝尖晶石
刚玉
镁铬砂
K2CO3
抗侵蚀性能
calcium hexaluminate
magnesia-alumina spinel
tabular corundum
magnesia-chrome sand
K2CO3
corrosion resistance
