CN110937907A - 一种用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖及其制备方法 - Google Patents

一种用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖及其制备方法 Download PDF

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CN110937907A
CN110937907A CN201911186600.0A CN201911186600A CN110937907A CN 110937907 A CN110937907 A CN 110937907A CN 201911186600 A CN201911186600 A CN 201911186600A CN 110937907 A CN110937907 A CN 110937907A
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mullite
silicon carbide
corundum
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向若飞
朱国平
王立旺
朱其良
王琪
李新明
彭晶晶
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Zhejiang Jincheng New Material Ltd By Share Ltd
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Abstract

本发明涉及一种用于水泥窑过渡带的节能型莫来石‑刚玉‑碳化硅耐火砖包含以下各组分及重量份：M70烧结莫来石47～56份、碳化硅10～18份、多孔刚玉8～11份、莫来石‑高硅氧玻璃7～10份、板状刚玉细粉5～10份、二氧化硅微粉4～8份、Si粉1～3份、结合剂4～8份；其制备方法包括配料、成型、干燥及烧成步骤。本发明制备工艺简单，所制得的耐火砖强度高、热震稳定性和隔热性能好，节能环保。

Description

一种用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖 及其制备方法
技术领域
本发明属于耐火材料技术领域，具体涉及一种用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖及其制备方法。
背景技术
水泥被广泛应用于工程建设等领域，是国家建设的重要基础材料。新型干法水泥制造工艺是现代水泥工业生产的主流发展方向，回转窑作为新型干法水泥生产工艺线的主要耗能设备之一，是煤粉燃烧、物料反应、物质运输的重要场所。由于水泥窑过渡带在水泥窑运行期间难以形成导热系数较低的窑皮，因此水泥窑过渡带成为整个水泥回转窑散热最为严重的区域。
随着水泥生产工艺的进步，窑温的升高、窑径的增加以及窑速的加快，使窑衬材料面临极大挑战，此外，废弃物替代燃料的应用，增加了入窑生料、燃料成分的波动，对窑衬材料侵蚀加剧。上述这些因素的综合作用增大了衬体所承受的热化学、热机械应力，由此产生了复杂的物理、化学环境。目前广泛应用在水泥窑过渡带的硅莫砖开始出现热震稳定性不稳定、耐磨性不足及使用寿命短等问题。
申请号为201710979456.0的中国专利公开了一种低导热高抗蚀刚玉质耐火砖及其制备方法，用于水泥窑过渡带的低导热耐火砖的制备，其稀有金属氧化物的大量添加导致成本昂贵；申请号为201711253662.X的中国专利公开了一种抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖及其制备方法，其引入了铬元素在使用过程中转变为六价铬污染环境；申请号为201710434168.7的中国专利公开了一种水泥窑过渡带用镁铝尖晶石砖及其制备方法，其制品的热膨胀系数较大，导致热震稳定有限；专利号为ZL201610637867.7的中国专利公开了一种莫来石碳化硅复相耐火材料及其制备方法，以涂层包覆轻质莫来石骨料和碳化硅骨料为原料制备低导热的莫来石碳化硅耐火材料，其工艺复杂，不利于大规模生产。
发明内容
本发明所要解决的技术问题在于提供一种用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖及其制备方法，制备工艺简单，所制得的耐火砖强度高、热震稳定性和隔热性能好，节能环保。
为解决上述技术问题，本发明提供的一种用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖，包含以下各组分及重量份：
Figure BDA0002292546200000021
优选地，所述M70烧结莫来石包括粒度为5～3mm、3～1mm、≤0.074mm三种规格，各种规格的重量份如下：
5～3mmM70烧结莫来石 20～22份
3～1mmM70烧结莫来石 12～14份
≤0.074mm M70烧结莫来石 15～20份。
优选地，所述M70烧结莫来石Al2O3的质量百分含量不小于70％。
优选地，所述碳化硅包括粒度为1～0mm、≤0.074mm两种规格，各种规格的重量份如下：
1～0mm碳化硅 4～8份
≤0.074mm碳化硅 6～10份。
优选地，所述多孔刚玉的粒度为1～0.5mm，体积密度≤2.9g/cm3，显气孔率≤10％。
优选地，所述莫来石-高硅氧玻璃的粒度为0.5～0.1mm，Al2O3的质量百分含量≥50％。
优选地，所述板状刚玉细粉的粒度≤0.045mm。
优选地，所述二氧化硅微粉的粒径≤0.003mm，SiO2的质量百分含量≥94％。
优选地，所述结合剂为黄糊精溶液或木质素磺酸钙溶液的一种。
所述用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖的制备方法，包含以下步骤：
A、配料：将原料中的颗粒与结合剂按比例混合均匀后，再按比例加入粉料搅拌形成均匀料；
B、成型：将步骤A形成的均匀料加入模具中，机压成型，且机压成型时预处理莫来石多孔骨料的破损率不大于5％；
C、干燥及烧成：将步骤B形成的坯体经100～120℃烘干后，装窑于1350～1450℃保温8～12h形成成品。
本发明的有益效果在于：
1、本发明在骨料中引入莫来石-高硅氧玻璃材料和刚玉多孔骨料，提高了耐火砖的热震稳定性和节能效果。
2、本发明在基质中引入板状刚玉细粉和二氧化硅微粉，高温下原位形成莫来石，提高了基质部分的强度。
具体实施方式
实施例1
一种用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖，包含以下各组分及重量份：
Figure BDA0002292546200000041
其中，所述M70烧结莫来石Al2O3的质量百分含量不小于70％；所述多孔刚玉的体积密度≤2.9g/cm3，显气孔率≤10％；所述莫来石-高硅氧玻璃的Al2O3的质量百分含量≥50％；所述二氧化硅微粉的SiO2的质量百分含量≥94％。
上述用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖的制备方法，包含以下步骤：
A、配料：将原料中的颗粒与结合剂按比例混合均匀后，再按比例加入粉料搅拌形成均匀料；
B、成型：将步骤A形成的均匀料加入模具中，机压成型，且机压成型时预处理莫来石多孔骨料的破损率不大于5％；
C、干燥及烧成：将步骤B形成的坯体经100～120℃烘干后，装窑于1350～1450℃保温8～12h形成成品。
实施例2
一种用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖，包含以下各组分及重量份：
Figure BDA0002292546200000051
其中，所述M70烧结莫来石Al2O3的质量百分含量不小于70％；所述多孔刚玉的体积密度≤2.9g/cm3，显气孔率≤10％；所述莫来石-高硅氧玻璃的Al2O3的质量百分含量≥50％；所述二氧化硅微粉的SiO2的质量百分含量≥94％。
上述用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖的制备方法，包含以下步骤：
A、配料：将原料中的颗粒与结合剂按比例混合均匀后，再按比例加入粉料搅拌形成均匀料；
B、成型：将步骤A形成的均匀料加入模具中，机压成型，且机压成型时预处理莫来石多孔骨料的破损率不大于5％；
C、干燥及烧成：将步骤B形成的坯体经100～120℃烘干后，装窑于1350～1450℃保温8～12h形成成品。
实施例3
一种用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖，包含以下各组分及重量份：
Figure BDA0002292546200000061
其中，所述M70烧结莫来石Al2O3的质量百分含量不小于70％；所述多孔刚玉的体积密度≤2.9g/cm3，显气孔率≤10％；所述莫来石-高硅氧玻璃的Al2O3的质量百分含量≥50％；所述二氧化硅微粉的SiO2的质量百分含量≥94％。
上述用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖的制备方法，包含以下步骤：
A、配料：将原料中的颗粒与结合剂按比例混合均匀后，再按比例加入粉料搅拌形成均匀料；
B、成型：将步骤A形成的均匀料加入模具中，机压成型，且机压成型时预处理莫来石多孔骨料的破损率不大于5％；
C、干燥及烧成：将步骤B形成的坯体经100～120℃烘干后，装窑于1350～1450℃保温8～12h形成成品。
实施例4
一种用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖，包含以下各组分及重量份：
Figure BDA0002292546200000071
其中，所述M70烧结莫来石Al2O3的质量百分含量不小于70％；所述多孔刚玉的体积密度≤2.9g/cm3，显气孔率≤10％；所述莫来石-高硅氧玻璃的Al2O3的质量百分含量≥50％；所述二氧化硅微粉的SiO2的质量百分含量≥94％。
上述用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖的制备方法，包含以下步骤：
A、配料：将原料中的颗粒与结合剂按比例混合均匀后，再按比例加入粉料搅拌形成均匀料；
B、成型：将步骤A形成的均匀料加入模具中，机压成型，且机压成型时预处理莫来石多孔骨料的破损率不大于5％；
C、干燥及烧成：将步骤B形成的坯体经100～120℃烘干后，装窑于1350～1450℃保温8～12h形成成品。
上述实施例1-4所制备的用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖性能如下：
Figure BDA0002292546200000081
由上述性能指标可知，本发明所制备的用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖性能良好且隔热效果优异。
本发明在骨料中引入莫来石-高硅氧玻璃材料和刚玉多孔骨料，提高了耐火砖的热震稳定性和节能效果。本发明在基质中引入板状刚玉细粉和二氧化硅微粉，高温下原位形成莫来石，提高了基质部分的强度。
上述说明是示例性的而非限制性的。通过上述说明本领域技术人员可以意识到本发明的许多种改变和变形，其也将落在本发明的实质和范围之内。

Claims (10)

1.一种用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖，其特征在于，包含以下各组分及重量份：
Figure FDA0002292546190000011
2.根据权利要求1所述的用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖，其特征在于，所述M70烧结莫来石包括粒度为5～3mm、3～1mm、≤0.074mm三种规格，各种规格的重量份如下：
5～3mmM70烧结莫来石 20～22份
3～1mmM70烧结莫来石 12～14份
≤0.074mm M70烧结莫来石 15～20份。
3.根据权利要求1或2所述的用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖，其特征在于，所述M70烧结莫来石Al2O3的质量百分含量不小于70％。
4.根据权利要求1所述的用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖，其特征在于，所述碳化硅包括粒度为1～0mm、≤0.074mm两种规格，各种规格的重量份如下：
1～0mm碳化硅 4～8份
≤0.074mm碳化硅 6～10份。
5.根据权利要求1所述的用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖，其特征在于，所述多孔刚玉的粒度为1～0.5mm，体积密度≤2.9g/cm3，显气孔率≤10％。
6.根据权利要求1所述的用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖，其特征在于，所述莫来石-高硅氧玻璃的粒度为0.5～0.1mm，Al2O3的质量百分含量≥50％。
7.根据权利要求1所述的用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖，其特征在于，所述板状刚玉细粉的粒度≤0.045mm。
8.根据权利要求1所述的用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖，其特征在于，所述二氧化硅微粉的粒径≤0.003mm，SiO2的质量百分含量≥94％。
9.根据权利要求1所述的用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖，其特征在于，所述结合剂为黄糊精溶液或木质素磺酸钙溶液的一种。
10.一种如权利要求1所述的用于水泥窑过渡带的节能型莫来石-刚玉-碳化硅耐火砖的制备方法，其特征在于，包含以下步骤：
A、配料：将原料中的颗粒与结合剂按比例混合均匀后，再按比例加入粉料搅拌形成均匀料；
B、成型：将步骤A形成的均匀料加入模具中，机压成型，且机压成型时预处理莫来石多孔骨料的破损率不大于5％；
C、干燥及烧成：将步骤B形成的坯体经100～120℃烘干后，装窑于1350～1450℃保温8～12h形成成品。
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