中空骨料对轻质MgO-MgAl2O4-C耐火材料力学性能的影响

doi:10.3969/j.issn.1001-1935.2025.01.007

耐火材料 ›› 2025, Vol. 59 ›› Issue (1): 38-44.DOI: 10.3969/j.issn.1001-1935.2025.01.007

中空骨料对轻质MgO-MgAl₂O₄-C耐火材料力学性能的影响

黄科¹⁾, 殷超凡^2,3), 王黎^2,3), 于仁红¹⁾, 董宾宾^2,3)臧云飞¹⁾, 梁艳晨¹⁾, 李满仓¹⁾, 秦峰^2,3)

1)河南科技大学材料科学与工程学院河南洛阳 471000
2)洛阳理工学院材料科学与工程学院河南洛阳 471023
3)河南省绿色建筑材料制造与智能装备重点实验室河南洛阳 471023

收稿日期:2024-05-28 出版日期:2025-02-15 发布日期:2025-02-27
通讯作者: 于仁红,女,1977年生,博士,教授。E-mail:yurenhong_wby@sina.com
作者简介:黄科:男,1998年生,硕士研究生。E-mail:1375523943@qq.com
基金资助:
* 国家自然科学基金资助项目(51972099,52202064);河南省自然科学基金(232300420329);河南省高等学校重点研究项目(23B430012);河南省重点研发专项(No.231111230300);河南省研究生教育改革与质量提升工程项目(YJS2023JD56);河南省高等学校重点科研项目计划(22A430028);洛阳市重大科技创新专项(No.2301009A)。

Effect of hollow aggregate on mechanical properties of lightweight MgO-MgAl₂O₄-C refractories

Huang Ke, Yin Chaofan, Wang Li, Yu Renhong, Dong Binbin, Zang Yunfei, Liang Yanchen, Li Mancang, Qin Feng

First author’s address:School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471000,Henan,China

Received:2024-05-28 Online:2025-02-15 Published:2025-02-27

摘要/Abstract

摘要： 为了有效降低内衬材料的热量损失,保持钢液温度稳定,以高纯电熔镁砂、自制镁铝尖晶石中空骨料、α-Al₂O₃微粉、镁铝尖晶石粉、Si粉、Al粉和鳞片石墨为主要原料,以热固性酚醛树脂为结合剂,经1 200 ℃和 1 400 ℃埋碳热处理制备了MgO-MgAl₂O₄-C耐火材料。探究了自制镁铝尖晶石中空骨料加入量(加入质量分数分别为0、3%、6%、9%)对轻质MgO-MgAl₂O₄-C耐火材料力学性能的影响。结果表明:经1 200 ℃热处理后试样中有SiC和AlN产生,升温至1 400 ℃时生成了片状MgAlON。随着镁铝尖晶石中空骨料加入量的增加,试样的显气孔率上升,体积密度下降。当热处理温度为1 400 ℃时,加入6%(w)镁铝尖晶石中空骨料试样的常温抗折强度和耐压强度均达到最大值,分别为14.8 MPa和121 MPa,抗折强度保持率高达80%。中空骨料的引入改变了应力分布方向,形成了不同的耗散机制,实现了对材料的增强增韧。

关键词: MgO-MgAl₂O₄-C耐火材料, 中空骨料, MgAl₂O₄, 力学性能

Abstract: In order to effectively reduce the heat loss of lining materials and maintain a stable molten steel temperature,MgO-MgAl₂O₄-C refractories were prepared using high purity fused magnesia,self-made magnesium-aluminate spinel hollow aggregates,α-Al₂O₃ micropowder,magnesium-aluminate spinel powder,Si powder,Al powder and graphite as main raw materials,and thermosetting phenolic resin as the binder,heat-treating at 1 200 or 1 400 ℃ in the carbon embedded condition.The effect of the self-made magnesium-aluminate spinel hollow aggregates addition (0,3%,6%,and 9%,by mass) on the mechanical properties of lightweight MgO-MgAl₂O₄-C refractories was investigated.The results show that SiC and AlN are formed in the sample heat-treated at 1 200 ℃.Up to 1 400℃,plate-like MgAlON is found.With the increase of the magnesium-aluminate spinel hollow aggregates addition,the apparent porosity of the sample increases and the bulk density decreases.When the heat-treating temperature is 1 400 ℃,the sample with 6% magnesium-aluminate spinel hollow aggregates has the highest cold modulus of rupture and the cold crushing strength of 14.8 MPa and 121 MPa,respectively,and the modulus or rupture retention radio reaches 80%.The introduction of hollow aggregates changes the stress distribution direction and forms different dissipative mechanisms to strengthen and toughen the materials.

Key words: MgO-MgAl₂O₄-C refractories, hollow aggregate, MgAl₂O₄, mechanical properties

中图分类号:

TQ175

黄科, 殷超凡, 王黎, 于仁红, 董宾宾臧云飞, 梁艳晨, 李满仓, 秦峰. 中空骨料对轻质MgO-MgAl₂O₄-C耐火材料力学性能的影响[J]. 耐火材料, 2025, 59(1): 38-44.

Huang Ke, Yin Chaofan, Wang Li, Yu Renhong, Dong Binbin, Zang Yunfei, Liang Yanchen, Li Mancang, Qin Feng. Effect of hollow aggregate on mechanical properties of lightweight MgO-MgAl₂O₄-C refractories[J]. Refractories, 2025, 59(1): 38-44.

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中空骨料对轻质MgO-MgAl₂O₄-C耐火材料力学性能的影响

Effect of hollow aggregate on mechanical properties of lightweight MgO-MgAl₂O₄-C refractories

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