CN106396700A - 刚玉复合多晶莫来石纤维轻质砖的生产方法 - Google Patents

刚玉复合多晶莫来石纤维轻质砖的生产方法 Download PDF

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CN106396700A
CN106396700A CN201610770039.0A CN201610770039A CN106396700A CN 106396700 A CN106396700 A CN 106396700A CN 201610770039 A CN201610770039 A CN 201610770039A CN 106396700 A CN106396700 A CN 106396700A
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temperature sintering
fine powder
polycrystalline mullite
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王光强
刘学燕
杨前进
韩雍雍
高延峰
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Shandong Lei Baogao Industry Science And Technology Co Ltd
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Abstract

本发明属于耐火保温材料技术领域，具体涉及一种刚玉复合多晶莫来石纤维轻质砖的生产方法。所述生产方法是以白刚玉细粉、α氧化铝细粉和多晶莫来石纤维为原料，以初始强度粘结剂和高温烧结强度粘结剂为复合结合剂，以水为分散介质，形成混合料浆，经真空吸滤、高压成型、干燥、高温烧结制得轻质砖。本发明工艺简单，不需要复杂的生产设备，成本低，对环境无污染；通过原料的优选以及粘结剂的复配使得生产的轻质砖强度高、耐高温、保温效果好，能够直接作为窑炉内衬使用。

Description

刚玉复合多晶莫来石纤维轻质砖的生产方法
技术领域
本发明属于耐火保温材料技术领域，具体涉及一种刚玉复合多晶莫来石纤维轻质砖的生产方法。
背景技术
随着我国工业的发展，能量消耗总量越来越高，选择和应用技术性能优良的绝热保温材料，可以降低窑炉辐射热损失、提高窑炉热效率，是实现工业热工设备优质高产、低消耗和节能减排最有效的技术手段。
目前耐火保温材料主要有轻质粘土砖、聚轻球砖、轻质莫来石砖、氧化铝空心球砖等，尺寸以标准砖为主，一般为230mm*114mm*65mm，其缺点是比重大、生产工艺复杂、有粉尘污染、不能现场加工、导热系数大、强度低、使用温度低、保温效果差、不能直接作为窑炉内衬使用等等。
发明内容
本发明的目的是提供一种生产工艺简单、无环境污染的刚玉复合多晶莫来石纤维轻质砖的生产方法，生产的轻质砖强度高、耐高温、保温效果好，能够直接作为窑炉内衬使用。
本发明所述的刚玉复合多晶莫来石纤维轻质砖的生产方法，是以白刚玉细粉、α氧化铝细粉和多晶莫来石纤维为原料，以初始强度粘结剂和高温烧结强度粘结剂为复合结合剂，以水为分散介质，形成混合料浆，经真空吸滤、高压成型、干燥、高温烧结制得轻质砖。
其中：
所述白刚玉细粉、α氧化铝细粉和多晶莫来石纤维的质量比为3-5:1-3:3-5。
所述初始强度粘结剂为纤维素、聚乙烯醇、淀粉、糊精按照质量比2:0.1:3:2的混合物。
所述高温烧结强度粘结剂为铝溶胶与硅溶胶按照质量比1-2:1-2的混合物。
所述铝溶胶为pH为2-3的盐酸法高碱度铝溶胶。
所述初始强度粘结剂与高温烧结强度粘结剂的质量比为1:1。
所述初始强度粘结剂和高温烧结强度粘结剂的总质量占白刚玉细粉、α氧化铝细粉和多晶莫来石纤维总质量的1.5-2.5％。
所述生产方法包括以下步骤：
(1)配制初始强度粘结剂水溶液：
按照纤维素、水质量比2:6-8，聚乙烯醇、水质量比0.1:100-150，淀粉、水质量比3:5-8，糊精、水质量比2:6-8，分别配制溶液后再混合得到初始强度粘结剂水溶液；
(2)配制高温烧结强度粘结剂：
将铝溶胶与硅溶胶按照质量比1-2:1-2混合，得到高温烧结强度粘结剂；
(3)配制混合料浆：
室温条件下，将白刚玉细粉、α氧化铝细粉和多晶莫来石纤维加入到水中搅拌均匀，再加入初始强度粘结剂水溶液、高温烧结强度粘结剂，混合均匀得到混合料浆；
(4)后处理：
混合料浆进入模具，经真空吸滤、高压成型、干燥、高温烧结制得刚玉复合多晶莫来石纤维轻质砖。
步骤(4)干燥温度为100-300℃，干燥时间16-24h。
步骤(4)高温烧结温度为1000-1700℃，高温烧结时间3-8h。
本发明具有以下有益效果：
本发明工艺简单，不需要复杂的生产设备，成本低，对环境无污染；通过原料的优选以及粘结剂的复配使得生产的轻质砖强度高、耐高温、保温效果好，能够直接作为窑炉内衬使用。
具体实施方式
以下结合实施例对本发明做进一步描述。
实施例1
刚玉复合多晶莫来石纤维轻质砖的生产方法如下：
(1)配制初始强度粘结剂水溶液：
按照纤维素、水质量比2:8，聚乙烯醇、水质量比0.1:100，淀粉、水质量比3:7，糊精、水质量比2:8，分别配制溶液后再混合得到初始强度粘结剂水溶液；
(2)配制高温烧结强度粘结剂：
将铝溶胶与硅溶胶按照质量比1:1混合，得到高温烧结强度粘结剂；
(3)配制混合料浆：
室温条件下，将白刚玉细粉、α氧化铝细粉和多晶莫来石纤维按照质量比4:2:4加入到水中搅拌均匀，再加入初始强度粘结剂水溶液、高温烧结强度粘结剂，混合均匀得到混合料浆；纤维素、聚乙烯醇、淀粉、糊精、铝溶胶与硅溶胶总质量占白刚玉细粉、α氧化铝细粉和多晶莫来石纤维总质量的2.0％；
(4)后处理：
混合料浆进入模具，经真空吸滤、高压成型、100℃干燥24h、1500℃烧结5h，制得刚玉复合多晶莫来石纤维轻质砖。
实施例2
刚玉复合多晶莫来石纤维轻质砖的生产方法如下：
(1)配制初始强度粘结剂水溶液：
按照纤维素、水质量比2:6，聚乙烯醇、水质量比0.1:130，淀粉、水质量比3:8，糊精、水质量比2:7，分别配制溶液后再混合得到初始强度粘结剂水溶液；
(2)配制高温烧结强度粘结剂：
将铝溶胶与硅溶胶按照质量比2:1混合，得到高温烧结强度粘结剂；
(3)配制混合料浆：
室温条件下，将白刚玉细粉、α氧化铝细粉和多晶莫来石纤维按照质量比5:2:3加入到水中搅拌均匀，再加入初始强度粘结剂水溶液、高温烧结强度粘结剂，混合均匀得到混合料浆；纤维素、聚乙烯醇、淀粉、糊精、铝溶胶与硅溶胶总质量占白刚玉细粉、α氧化铝细粉和多晶莫来石纤维总质量的2.5％；
(4)后处理：
混合料浆进入模具，经真空吸滤、高压成型、200℃干燥20h、1000℃烧结8h，制得刚玉复合多晶莫来石纤维轻质砖。
实施例3
刚玉复合多晶莫来石纤维轻质砖的生产方法如下：
(1)配制初始强度粘结剂水溶液：
按照纤维素、水质量比2:7，聚乙烯醇、水质量比0.1:150，淀粉、水质量比3:5，糊精、水质量比2:6，分别配制溶液后再混合得到初始强度粘结剂水溶液；
(2)配制高温烧结强度粘结剂：
将铝溶胶与硅溶胶按照质量比1:2混合，得到高温烧结强度粘结剂；
(3)配制混合料浆：
室温条件下，将白刚玉细粉、α氧化铝细粉和多晶莫来石纤维按照质量比3:3:5加入到水中搅拌均匀，再加入初始强度粘结剂水溶液、高温烧结强度粘结剂，混合均匀得到混合料浆；纤维素、聚乙烯醇、淀粉、糊精、铝溶胶与硅溶胶总质量占白刚玉细粉、α氧化铝细粉和多晶莫来石纤维总质量的1.5％；
(4)后处理：
混合料浆进入模具，经真空吸滤、高压成型、300℃干燥16h、1700℃烧结3h，制得刚玉复合多晶莫来石纤维轻质砖。

Claims (10)

1.一种刚玉复合多晶莫来石纤维轻质砖的生产方法，其特征在于：以白刚玉细粉、α氧化铝细粉和多晶莫来石纤维为原料，以初始强度粘结剂和高温烧结强度粘结剂为复合结合剂，以水为分散介质，形成混合料浆，经真空吸滤、高压成型、干燥、高温烧结制得轻质砖。
2.根据权利要求1所述的生产方法，其特征在于：所述白刚玉细粉、α氧化铝细粉和多晶莫来石纤维的质量比为3-5:1-3:3-5。
3.根据权利要求1所述的生产方法，其特征在于：所述初始强度粘结剂为纤维素、聚乙烯醇、淀粉、糊精按照质量比2:0.1:3:2的混合物。
4.根据权利要求1所述的生产方法，其特征在于：所述高温烧结强度粘结剂为铝溶胶与硅溶胶按照质量比1-2:1-2的混合物。
5.根据权利要求4所述的生产方法，其特征在于：所述铝溶胶为pH为2-3的盐酸法高碱度铝溶胶。
6.根据权利要求1所述的生产方法，其特征在于：所述初始强度粘结剂与高温烧结强度粘结剂的质量比为1:1。
7.根据权利要求1所述的生产方法，其特征在于：所述初始强度粘结剂和高温烧结强度粘结剂的总质量占白刚玉细粉、α氧化铝细粉和多晶莫来石纤维总质量的1.5-2.5％。
8.根据权利要求1-7任一所述的生产方法，其特征在于包括以下步骤：
(1)配制初始强度粘结剂水溶液：
按照纤维素、水质量比2:6-8，聚乙烯醇、水质量比0.1:100-150，淀粉、水质量比3:5-8，糊精、水质量比2:6-8，分别配制溶液后再混合得到初始强度粘结剂水溶液；
(2)配制高温烧结强度粘结剂：
将铝溶胶与硅溶胶按照质量比1-2:1-2混合，得到高温烧结强度粘结剂；
(3)配制混合料浆：
室温条件下，将白刚玉细粉、α氧化铝细粉和多晶莫来石纤维加入到水中搅拌均匀，再加入初始强度粘结剂水溶液、高温烧结强度粘结剂，混合均匀得到混合料浆；
(4)后处理：
混合料浆进入模具，经真空吸滤、高压成型、干燥、高温烧结制得刚玉复合多晶莫来石纤维轻质砖。
9.根据权利要求8所述的生产方法，其特征在于：步骤(4)干燥温度为100-300℃，干燥时间为16-24h。
10.根据权利要求8所述的生产方法，其特征在于：步骤(4)高温烧结温度为1000-1700℃，高温烧结时间为3-8h。
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