乳酸镁和葡萄糖酸镁对轻烧MgO水化行为的影响

doi:10.3969/j.issn.1001-1935.2025.04.004

耐火材料 ›› 2025, Vol. 59 ›› Issue (4): 297-301.DOI: 10.3969/j.issn.1001-1935.2025.04.004

乳酸镁和葡萄糖酸镁对轻烧MgO水化行为的影响

周晶, 王周福, 刘浩, 马妍, 夏忠锋, 全正煌, 邓承继

武汉科技大学先进耐火材料全国重点实验室湖北武汉 430081

收稿日期:2024-11-14 出版日期:2025-08-15 发布日期:2025-08-18
通讯作者: 王周福,男,1965年生,博士,教授。E-mail:whwangzf@126.com。
作者简介:周晶:女,1999年生,硕士研究生。E-mail:1977255385@qq.com
基金资助:
国家自然科学基金区域联合基金项目(U20A20239);国家自然科学基金(52372031)。

Effect of magnesium lactate and magnesium gluconate on hydration behavior of light-burnt magnesia

Zhou Jing, Wang Zhoufu, Liu Hao, Ma Yan, Xia Zhongfeng, Quan Zhenghuang, Deng Chengji

First author's address:State Key Laboratory of Advanced Refractories,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China

Received:2024-11-14 Online:2025-08-15 Published:2025-08-18

摘要/Abstract

摘要： 为优化轻烧氧化镁的水化行为,以轻烧氧化镁为原料,乳酸镁和葡萄糖酸镁为调凝剂,通过对轻烧MgO的水化程度、水化热和低场核磁共振氢谱(¹H-NMR)进行表征,研究2种调凝剂(乳酸镁、葡萄糖酸镁)对轻烧MgO凝结时间及水化产物显微形貌的影响。结果表明:相对于乳酸镁,葡萄糖酸镁对轻烧MgO水化、硬化行为和水化产物显微形貌的影响更为明显;引入3%(w)乳酸镁水化50 h累计放热量约为400 J·g^-1,初凝时间为15 min,水化产物晶体形貌呈薄片花瓣状;引入3%(w)葡萄糖酸镁水化50 h累计放热量约为300 J·g^-1,初凝时间延长至45 min,水化产物晶体形貌呈六方板形或四方双锥形。

关键词: 轻烧MgO, 调凝剂, 水化行为, 乳酸镁, 葡萄糖酸镁

Abstract: To optimize its hydration behavior,light-burnt magnesia was used as the raw material,with magnesium lactate and magnesium gluconate as retarders.The hydration degree,hydration heat,and ¹H-NMR of the light-burnt magnesia were characterized to study the effects of the two retarders on the setting time and the microscopic morphology of the hydration products of the light-burnt magnesia.The results show that,compared with magnesium lactate,magnesium gluconate has a more significant effect on the hydration,the hardening behavior,and the microscopic morphology of the hydration products of the light-burnt MgO.With 3 mass% magnesium lactate,the cumulative heat release after 50 h of hydration is approxi-mately 400 J·g^-1,the initial setting time is 15 min,and the hydration products exhibit lamellar petal-like crystal morphology.With 3 mass% magnesium gluconate,the cumulative heat release after 50 h of hydration is approximately 300 J·g^-1,the initial setting time extends to 45 min,and the hydration products show hexagonal plate-like or tetragonal bipyramidal crystal morphology.

Key words: light-burnt magnesia, retarder, hydration behavior, magnesium lactate, magnesium gluconate

中图分类号:

TQ175.1

周晶, 王周福, 刘浩, 马妍, 夏忠锋, 全正煌, 邓承继. 乳酸镁和葡萄糖酸镁对轻烧MgO水化行为的影响[J]. 耐火材料, 2025, 59(4): 297-301.

Zhou Jing, Wang Zhoufu, Liu Hao, Ma Yan, Xia Zhongfeng, Quan Zhenghuang, Deng Chengji. Effect of magnesium lactate and magnesium gluconate on hydration behavior of light-burnt magnesia[J]. Refractories, 2025, 59(4): 297-301.

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乳酸镁和葡萄糖酸镁对轻烧MgO水化行为的影响

Effect of magnesium lactate and magnesium gluconate on hydration behavior of light-burnt magnesia

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