耐火材料 ›› 2022, Vol. 56 ›› Issue (1): 6-9.DOI: 10.3969/j.issn.1001-1935.2022.01.002

• 研究开发 • 上一篇    下一篇

添加浮选镁砂颗粒和Al2O3细粉对方镁石-尖晶石砖性能的影响

李燕京1,2)(), 孙加林1)(), 李勇1), 康剑3), 马淑龙2), 马飞3), 高长贺2), 张积礼3), 张海波3)   

  1. 1)北京科技大学 材料科学与工程学院 北京 100083
    2)北京金隅通达耐火技术有限公司 北京 100041
    3)巩义通达中原耐火技术有限公司 河南郑州 451200
  • 收稿日期:2021-06-16 出版日期:2022-02-15 发布日期:2022-02-24
  • 通讯作者: 孙加林,男,1956年生,教授,博士生导师。E-mail: ustb_sun@163.com
  • 作者简介:李燕京:女,1972年生,博士研究生,教授级高级工程师。E-mail: liyj@bjtd.com.cn
  • 基金资助:
    国家重点研发计划“固废资源化”重点专项项目(2018YFC1901504)

Effect of flotation magnesia particles and Al2O3 fines on properties of periclase-spinel bricks

Li Yanjing1,2)(), Sun Jialin1)(), Li Yong1), Kang Jian3), Ma Shulong2), Ma Fei3), Gao Changhe2), Zhang Jili3), Zhang Haibo3)   

  1. 1)School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China
  • Received:2021-06-16 Online:2022-02-15 Published:2022-02-24
  • Contact: Sun Jialin

摘要:

以烧结镁砂、浮选镁砂、电熔镁铝尖晶石和煅烧Al2O3细粉为主要原料,以木质素磺酸钙为结合剂,经混练、成型、1 650 ℃烧成制备了方镁石-尖晶石砖,主要研究了以浮选镁砂颗粒替代普通烧结镁砂颗粒以及在此基础上外加不同量煅烧Al2O3细粉(质量分数分别为0、3%和5%)对方镁石-尖晶石砖性能的影响。结果表明:1)以浮选镁砂颗粒替代普通烧结镁砂颗粒制备的方镁石-尖晶石砖,显气孔率和常温耐压强度降低,体积密度、抗热震性、高温强度和高温韧性提高。2)在以浮选镁砂颗粒替代普通烧结镁砂颗粒制备的方镁石-尖晶石砖中,随着煅烧Al2O3细粉引入量的增多,显气孔率和常温耐压强度降低,体积密度、抗热震性、高温强度和高温韧性提高。

关键词: 浮选镁砂, 氧化铝细粉, 方镁石-尖晶石砖, 抗热震性, 高温韧性

Abstract:

Periclase-spinel bricks were prepared using sintered magnesia,flotation magnesia,fused magnesium aluminate spinel and calcined Al2O3 fines as starting materials and calcium lignosulfonate as the binder,mixing,shaping and firing at 1 650 ℃.Flotation magnesia particles were used to replace ordinary sintered magnesia particles and different amounts of calcined Al2O3 fines were extra-added (0%,3% and 5%,by mass) to investigate their effects on the properties of periclase-spinel bricks.The results show that:(1)the periclase-spinel bricks prepared with flotation magnesia particles have reduced apparent porosity and cold compressive strength,and enhanced bulk density,thermal shock resistance,hot strength and hot toughness;(2)in the periclase-spinel bricks prepared with flotation magnesia particles,as the calcined Al2O3 fines addition increases,the apparent porosity and the cold compressive strength decrease,and the bulk density,the thermal shock resistance,the hot strength and the hot toughness are improved.

Key words: flotation magnesia, alumina fines, periclase-spinel brick, thermal shock resistance, hot toughness

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