耐火材料

耐火材料 ›› 2023, Vol. 57 ›› Issue (3): 189-193.DOI: 10.3969/j.issn.1001-1935.2023.03.002

• 研究开发 • 上一篇    下一篇

二铝酸钙加入量对刚玉浇注料性能的影响

秦红彬1), 金锋2), 唐世明3), 周慧君1), 李红霞1), 石书冰1), 张三华1), 程立2), 惠先磊1)   

  1. 1)中钢集团洛阳耐火材料研究院有限公司 先进耐火材料国家重点实验室 河南洛阳 471039
    2)中钢设备有限公司 北京 100080
    3)宝钢湛江钢铁有限公司 广东湛江 524072
  • 收稿日期:2022-07-01 出版日期:2023-06-15 发布日期:2023-06-21
  • 通讯作者: 李红霞,女,1965年生,博士,正高级工程师。E-mail:lihongx0622@126.com
  • 作者简介:秦红彬:男,1987年生,博士,高级工程师。E-mail:qinhongbin@sina.cn
  • 基金资助:
    中国宝武低碳冶金创新基金资助项目(BWLCF202106)。

Effect of calcium dialuminate addition on properties of corundum castables

Qin Hongbin, Jin Feng, Tang Shiming, Zhou Huijun, Li Hongxia, Shi Shubing, Zhang Sanhua, Cheng Li, Hui Xianlei   

  1. First author’s address: State Key Laboratory of Advanced Refractories, Sinosteel Luoyang Institute of Refractories Research Co., Ltd., Luoyang 471039, Henan, China
  • Received:2022-07-01 Online:2023-06-15 Published:2023-06-21

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摘要： 为了改善刚玉浇注料的性能,以白刚玉、二铝酸钙(CA2)、活性α-Al2O3微粉和纯铝酸钙水泥为主要原料,制备了刚玉浇注料,研究了CA2加入量(加入质量分数分别为0、20%、30%、40%)对刚玉浇注料性能的影响。结果表明:1)随着CA2的增多,刚玉浇注料的体积密度大幅减小,110 ℃烘干和800 ℃热处理后的常温耐压强度明显改善,而1 200 ℃热处理后的常温耐压强度变化不明显;2)随着CA2的增多,浇注料的平均热膨胀系数逐渐降低,热导率大幅降低,试样经800 ℃水冷热震后的抗折强度保持率大幅提升;3)CA2的引入大幅提升了刚玉浇注料的透气性,且不影响刚玉浇注料的抗氢气还原性能。

关键词: 二铝酸钙, 刚玉浇注料, 抗热震性, 热导率, 热膨胀系数, 抗氢气还原性能

Abstract: In order to improve the performance of corundum castables,white corundum,calcium dealuminate (CA2),active α-Al2O3 micropowder and pure calcium aluminate cement were used as main raw materials to prepare corundum castables.The effects of the CA2 addition (0,20%,30%,40%,by mass) on the properties of corundum castables were studied.The results show that:(1)with the increase of the CA2 addition,the bulk density of corundum castables decreases significantly,and the cold compressive strength of corundum castables after drying at 110 ℃ and the heat treatment at 800 ℃ is improved obviously,while the cold compressive strength after the heat treatment at 1 200 ℃ changes slightly;(2)with the increase of the CA2 addition,the average thermal expansion coefficient decreases gradually,the thermal conductivity decreases significantly,and the retention rate of the modulus of rupture of the sample after 800 ℃ water-quenching thermal shock is greatly improved;(3) the introduction of CA2 greatly improves the permeability,and does not affect the resistance to hydrogen reduction of corundum castables.

Key words: CA2, corundum castables, thermal shock resistance, thermal conductivity, thermal expansion coefficient, resistance to hydrogen reduction

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