CN113213958A - 一种含碳耐火材料中尖晶石原位反应调控方法 - Google Patents

一种含碳耐火材料中尖晶石原位反应调控方法 Download PDF

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CN113213958A
CN113213958A CN202110628572.4A CN202110628572A CN113213958A CN 113213958 A CN113213958 A CN 113213958A CN 202110628572 A CN202110628572 A CN 202110628572A CN 113213958 A CN113213958 A CN 113213958A
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spinel
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oxide powder
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马渭奎
李红霞
刘国齐
杨文刚
王刚
钱凡
于建宾
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Sinosteel Luoyang Institute of Refractories Research Co Ltd
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    • C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
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    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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Abstract

本发明属于耐火材料技术领域，具体涉及一种含碳耐火材料中尖晶石原位反应调控方法。涉及的一种含碳耐火材料中尖晶石原位反应调控方法通过在氧化铝石墨复合材料中引入碳包覆氧化物粉体；在氧化镁石墨复合材料中引入碳包覆氧化物粉体；在尖晶石石墨复合材料中引入碳包覆氧化物粉体；氧化铝石墨复合材料中的碳包覆氧化物粉体为碳包覆氧化镁粉体或碳包覆尖晶石粉体；氧化镁石墨复合材料中的碳包覆氧化物粉体为碳包覆氧化铝粉体或碳包覆尖晶石粉体；尖晶石石墨复合材料中的碳包覆氧化物粉体为碳包覆氧化镁粉体或碳包覆氧化铝粉体。本发明改善了制品的抗热震性能和抗冲刷性能，提高了制品服役寿命。

Description

一种含碳耐火材料中尖晶石原位反应调控方法
技术领域
本发明属于耐火材料技术领域，具体涉及一种含碳耐火材料中尖晶石原位反应调控方法。
背景技术
近年来，含碳耐火材料朝着“长寿化，低碳化”的方向发展，碳含量的降低必然劣化含碳材料的抗热震性和抗渣性能，一定程度上影响了含碳耐火材料的使用效果；为了弥补低碳化对含碳耐火材料性能的削弱，现有研究表明利用镁铝尖晶石化现象能提高含碳耐火材料的性能，改善其组织结构；例如在镁碳耐火材料中添加氧化铝微粉，原位生成的镁铝尖晶石使材料基质结合更加紧密，改善了材料的组织结构，提高了材料性能。
高温下，氧化铝在尖晶石中具有很高的固溶范围；将尖晶石引入铝碳耐火材料中二次尖晶石化反应所伴随的体积膨胀影响材料体积稳定性；含碳耐火材料中尖晶石化现象也会导致其服役失效；例如在工业生产中经常使用镁碳和铝碳材料进行结构复合制备连铸用功能耐火材料，但在铝碳材料和镁碳材料界面发生尖晶石化反应引起的体积膨胀效应会影响复合结构功能耐火材料的体积稳定性，容易引起棒头断裂等中断连铸的事故。
发明内容
为解决上述技术问题，本发明的目的是提出一种含碳耐火材料中尖晶石原位反应调控方法。
本发明完成上述目的采用如下技术方案：
一种含碳耐火材料中尖晶石原位反应调控方法，反应调控方法通过在氧化铝石墨复合材料中引入碳包覆氧化物粉体；在氧化镁石墨复合材料中引入碳包覆氧化物粉体；在尖晶石石墨复合材料中引入碳包覆氧化物粉体；所述碳包覆氧化镁粉体在含碳耐火材料中加入量为5%-15%；氧化铝石墨复合材料中的碳包覆氧化物粉体为碳包覆氧化镁粉体或碳包覆尖晶石粉体；氧化镁石墨复合材料中的碳包覆氧化物粉体为碳包覆氧化铝粉体或碳包覆尖晶石粉体；尖晶石石墨复合材料中的碳包覆氧化物粉体为碳包覆氧化镁粉体或碳包覆氧化铝粉体。
所述氧化铝石墨复合材料中氧化铝含量50%-77%；石墨含量8%-35%。
所述氧化镁石墨复合材料中氧化镁含量65%-80%；石墨含量8%-20%。
所述尖晶石石墨复合材料中尖晶石含量65%-75%；石墨含量15%-25%。
所述碳包覆氧化物粉体采用化学沉积法，将氧化物和固态酚醛树脂按照质量比80%-90%：10%-20%完全混均后，置于非氧化气氛中850℃保温3-5h制得。
所述碳包覆氧化物粉体采用物理包覆法，将氧化物和鳞片石墨粉或膨胀石墨粉按照质量比80%-90%：10%-20%置于陶瓷罐中在行星式球磨机中共磨5-10h制得。
所述碳包覆氧化物粉体中所用氧化物粉体粒度均≤45微米，纯度大于等于99%；固态酚醛树脂粒度＜0.075mm，残炭率＞50%；鳞片石墨粒度小于0.15mm，碳含量＞98%；膨胀石墨粒度＜0.1mm，碳含量＞99%。
本发明提出的一种含碳耐火材料中尖晶石原位反应调控方法，利用可控的尖晶石原位反应优化含碳材料的组织结构，改善了制品的抗热震性能和抗冲刷性能，提高了制品服役寿命。
具体实施方式
实施例1：
按照质量比例镁砂：固态树脂粉=85:15，称取1Kg混合粉体置于氮气保护电炉内按照5℃/min升温速加热至850℃，保温3h；待炉温冷却至室温，将碳化后粉体细磨过240目筛子备用；按照质量百分数55%刚玉颗粒、10%鳞片石墨、25%刚玉细粉，10%碳包覆氧化镁粉体，外加7%液态酚醛树脂进行混料。
实施例2：
按照质量比例氧化铝：膨胀石墨=90:10，称取1Kg混合粉体；按照球料比为1:1置于行星式球磨机内球磨8h后备用；按照质量百分数60%镁砂颗粒、8%鳞片石墨、17%镁砂细粉，15%碳包覆氧化铝粉体，外加7%液态酚醛树脂进行混料。
实施例3：按照质量比例尖晶石：膨胀石墨=85:15，称取1kg混合粉体；按照球料比为1:1置于行星式球磨机内球磨8h后备用；按照质量百分数45%刚玉颗粒，15%石墨，25%刚玉细粉,15%碳包覆尖晶石粉体，外加7%液态树脂进行混料。

Claims (6)

1.一种含碳耐火材料中尖晶石原位反应调控方法，其特征在于：反应调控方法通过在氧化铝石墨复合材料中引入碳包覆氧化物粉体；在氧化镁石墨复合材料中引入碳包覆氧化物粉体；在尖晶石石墨复合材料中引入碳包覆氧化物粉体；所述碳包覆氧化镁粉体在含碳耐火材料中加入量为5%-15%；氧化铝石墨复合材料中的碳包覆氧化物粉体为碳包覆氧化镁粉体或碳包覆尖晶石粉体；氧化镁石墨复合材料中的碳包覆氧化物粉体为碳包覆氧化铝粉体或碳包覆尖晶石粉体；尖晶石石墨复合材料中的碳包覆氧化物粉体为碳包覆氧化镁粉体或碳包覆氧化铝粉体。
2.如权利要求1所述的一种含碳耐火材料中尖晶石原位反应调控方法，其特征在于：所述氧化铝石墨复合材料中氧化铝含量50%-77%；石墨含量8%-35%。
3.如权利要求1所述的一种含碳耐火材料中尖晶石原位反应调控方法，其特征在于：所述氧化镁石墨复合材料中氧化镁含量65%-80%；石墨含量8%-20%。
4.如权利要求1所述的一种含碳耐火材料中尖晶石原位反应调控方法，其特征在于：所述碳包覆氧化物粉体采用化学沉积法，将氧化物和固态酚醛树脂按照质量比80%-90%：10%-20%完全混均后，置于非氧化气氛中850℃保温3-5h制得。
5.如权利要求1所述的一种含碳耐火材料中尖晶石原位反应调控方法，其特征在于：所述碳包覆氧化物粉体采用物理包覆法，将氧化物和鳞片石墨粉或膨胀石墨粉按照质量比80%-90%：10%-20%置于陶瓷罐中在行星式球磨机中共磨5-10h制得。
6.如权利要求1所述的一种含碳耐火材料中尖晶石原位反应调控方法，其特征在于：所述碳包覆氧化物粉体中所用氧化物粉体粒度均≤45微米，纯度大于等于99%；固态酚醛树脂粒度＜0.075mm，残炭率＞50%；鳞片石墨粒度小于0.15mm，碳含量＞98%；膨胀石墨粒度＜0.1mm，碳含量＞99%。
CN202110628572.4A 2021-06-07 2021-06-07 一种含碳耐火材料中尖晶石原位反应调控方法 Pending CN113213958A (zh)

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CN1287544A (zh) * 1998-09-30 2001-03-14 品川白炼瓦株式会社 未烧成的含碳耐火物及熔融金属用容器
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