耐火材料 ›› 2023, Vol. 57 ›› Issue (3): 226-230.DOI: 10.3969/j.issn.1001-1935.2023.03.009

• 研究开发 • 上一篇    下一篇

用工业镁渣制备六铝酸钙/钙铝黄长石复相材料研究

白频波1), 邢莉2), 孔祥辰3), 田玉明3,4)   

  1. 1)阳泉市长青石油压裂支撑剂有限公司 山西阳泉 045200
    2)山西工程职业学院 山西太原 030001
    3)太原科技大学 材料科学与工程学院 山西太原 0300244)山西科技学院 山西晋城 048000
  • 收稿日期:2022-07-09 出版日期:2023-06-15 发布日期:2023-06-21
  • 通讯作者: 孔祥辰,男,1988年,博士,讲师。E-mail:xckong@tyust.edu.cn
  • 作者简介:白频波:男,1988年生,硕士,工程师。E-mail:baipinbo@163.com
  • 基金资助:
    山西省基础研究计划青年项目(2022030212123);来晋博士科研资助项目(20222069)。

Preparation of calcium hexaaluminate/gehlenite composite from industrial magnesium slag

Bai Pinbo, Xing Li, Kong Xiangchen, Tian Yuming   

  1. First author’s address: Yangquan Changqing Petroleum Proppant Co., Ltd., Yangquan 045200, Shanxi, China
  • Received:2022-07-09 Online:2023-06-15 Published:2023-06-21

摘要: 为实现工业废渣的有效利用,以工业镁渣、氧化铝为主要原料,加入4%(w)的PVA塑化剂,采用高温无压烧结法分别在1 300、1 400、1 500、1 600 ℃保温3 h后,得到六铝酸钙/钙铝黄长石(CA6/C2AS)复相耐火材料,研究热处理温度对其物相组成、物理性能的影响。结果表明:经1 500 ℃热处理3 h后的试样综合性能较优,其体积密度为1.59 g·cm-3,显气孔率为52.7%,抗折强度为30.8 MPa,荷重软化温度为1 544 ℃,水化36 h 后质量增加率不高于0.22%,800 ℃热震后抗折强度保持率为52.7%。试样具有较好的结构稳定性、抗水化性和抗热震性。

关键词: CA6/C2AS, 镁渣, 抗水化性, 抗热震性, 荷重软化温度

Abstract: In order to realize the effective utilization of industrial waste slag,industrial magnesium slag and alumina were used as the main raw materials,and 4 mass% PVA plasticizer was added,the calcium hexaaluminate/gehlenite (CA6/C2AS) composite was obtained by high temperature pressureless sintering at 1 300,1 400,1 500 and 1 600 ℃ for 3 h,respectively.The effects of the heat treatment temperature on the phase composition and the physical properties of the samples were studied.The comprehensive properties of the samples after heat treatment at 1 500 ℃ for 3 h are optimal:1.59 g·cm-3 bulk density,52.7% apparent porosity,30.8 MPa modulus of rupture,1 544 ℃ refractoriness-under-load,lower than 0.22% mass gain rate after hydration for 36 h,and 52.7% modulus of rupture retention ratio after thermal shock at 800 ℃.The samples show good structural stability,hydration resistance and thermal shock resistance.

Key words: CA6/C2AS, magnesium slag, hydration resistance, thermal shock resistance, refractoriness-under-load

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