CN116462518A - 一种低导热耐火砖及其制备方法 - Google Patents
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- 238000000034 method Methods 0.000 claims abstract description 14
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- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 9
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 9
- 239000002689 soil Substances 0.000 claims abstract description 7
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 claims abstract description 6
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- 239000000203 mixture Substances 0.000 claims description 12
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- 239000000463 material Substances 0.000 claims description 8
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- 238000002156 mixing Methods 0.000 claims description 6
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
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- 239000002002 slurry Substances 0.000 claims description 3
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Abstract
本发明公开了一种低导热耐火砖及其制备方法,涉及耐火砖制备技术领域,该低导热耐火砖的原料按重量份分为:莫来石40‑60份、白毛土12‑18份、铝矾土熟料20‑30份、矿物原料30‑40份、硼化钛10‑15份、粉煤灰15‑20份、球形闭孔珍珠岩20‑30份、可燃尽物质8‑12份、生坯增强剂5‑7份、减水剂1‑3份和余量的水;本设计通过在生产工艺中加入白毛土,便于在烧结过程中类似陶瓷形成过程,使耐火砖的常温耐压强度高,同时加入粉煤灰和球形闭孔珍珠岩,可以使耐火砖制备过程中形成大量分布均匀的不规则气孔,保障了耐火砖的低导热性能,降低了耐火砖的体积密度,本发明制备的低导热耐火砖,不仅重量轻、体密小,热传导率低,而且耐高温,砖体不易变形,使用寿命长。
Description
技术领域
本发明涉及耐火砖制备技术领域,具体为一种低导热耐火砖及其制备方法。
背景技术
耐火砖是一种建筑材料砖类,它是用耐火黏土或其他耐火原料烧制成的耐火材料,可以在高温下经受各种物理化学变化和机械作用,耐火砖经常会在建筑施工中出现,比如房屋建筑、窑炉建筑、热工设备等;
目前的耐火砖容易存在比重大、导热系数大的缺陷,此缺陷在应用到窑炉建筑,例如锅炉炉墙时,很容易造成锅炉炉墙的隔热效果差,散热快,导致能源浪费,为此,本发明提供了一种低导热耐火砖及其制备方法。
发明内容
针对现有技术的不足,本发明提供了一种低导热耐火砖及其制备方法,解决了上述背景技术所提出的问题。
为实现以上目的,本发明通过以下技术方案予以实现:
一种低导热耐火砖的制备方法,其制备方法包括以下步骤:
步骤一:将一定份量的莫来石以及矿物原料进行粉碎预处理,过90-100目筛,得粉料备用;
步骤二:将一定份量的白毛土、铝矾土熟料以及硼化钛加入到混料机内进行混合搅拌10-15min,然后再通过粉碎搅拌,得混合料;
步骤三、将所得粉料和混合料依次加入到混料机内,进行充分混合搅拌20-30min,转速为500-600r/min,期间依次加入粉煤灰和球形闭孔珍珠岩,搅拌均匀后得混合物;
步骤四、将可燃尽物质加入到上述混合均匀的混合物内,并加入一定量的水,然后进行搅拌5-10min,再加入生坯增强剂以及减水剂,继续混合搅拌10-20min,直至完全混合成泥浆料后,备用;
步骤五、将混合成的泥浆料注入到模型中进行成型处理,然后置于室温下静置养护,时间在24-36h,静置完成后,进行脱模处理,得成型模坯,此时成型模坯所含水分大约为35%-38%,脱模后,继续静置12-20h,直至成型模坯所含水分将至20%-30%即可;
步骤六、当成型模坯的水分降低至20%-30%后,将成型模坯放入干燥室进行干燥处理,当成型模坯所含水分低至2-3%时即可;
步骤七、再将步骤六所得的成型模坯上窑烧制,得低导热耐火砖。
作为本发明进一步的技术方案,所述步骤三中加入粉煤灰和球形闭孔珍珠岩时,混料机的转速提升至800-900r/min。
作为本发明进一步的技术方案,所述步骤六中干燥室的干燥温度在90-110℃,干燥时间为24-48h。
作为本发明进一步的技术方案,所述步骤七中上窑烧制温度在1600-1700℃,烧制完成后,冷却温度至200℃,保温3-4h时,再冷却至常温即可。
一种低导热耐火砖,该低导热耐火砖的原料按重量份分为:莫来石40-60份、白毛土12-18份、铝矾土熟料20-30份、矿物原料30-40份、硼化钛10-15份、粉煤灰15-20份、球形闭孔珍珠岩20-30份、可燃尽物质8-12份、生坯增强剂5-7份、减水剂1-3份和余量的水。
作为本发明进一步的技术方案,所述矿物原料按重量份分为:蓝精石30-40份、石英10-20分、方英石30-40份、硅线石25-35份。
作为本发明进一步的技术方案,所述可燃尽物质按重量份分为:锯末70-90份、炭末50-70份。
作为本发明进一步的技术方案,所述球形闭孔珍珠岩的导热系数为0.047-0.054W/m·k,堆积密度为0.09-0.16g/cm3。
本发明提供了一种低导热耐火砖及其制备方法,与现有技术相比具备以下有益效果:
一种低导热耐火砖及其制备方法,通过在生产工艺中加入白毛土,便于在烧结过程中类似陶瓷形成过程,可以使耐火砖的常温耐压强度高,而且配用炭末和锯木屑作为辅料,可以在烧结过程中形成大量气孔,使制备的耐火砖体积密度小,导热系数低,同时加入粉煤灰和球形闭孔珍珠岩,由于球形闭孔珍珠岩具有颗粒均匀、吸水率低、易分散的特性,可以使耐火砖制备过程中形成大量分布均匀的不规则气孔,保障了耐火砖的低导热性能,降低了耐火砖的体积密度,本发明制备的低导热耐火砖,不仅重量轻、体密小,热传导率低,而且耐高温,砖体不易变形,使用寿命长。
具体实施方式
下面将结合本发明实施例中,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
本发明提供一种低导热耐火砖及其制备方法技术方案:
一种低导热耐火砖及其制备方法,其制备方法包括以下步骤:
步骤一:将一定份量的莫来石以及矿物原料进行粉碎预处理,过90-100目筛,得粉料备用;
步骤二:将一定份量的白毛土、铝矾土熟料以及硼化钛加入到混料机内进行混合搅拌10-15min,然后再通过粉碎搅拌,得混合料;
步骤三、将所得粉料和混合料依次加入到混料机内,进行充分混合搅拌20-30min,转速为500-600r/min,期间依次加入粉煤灰和球形闭孔珍珠岩,加入时,混料机的转速提升至800-900r/min,搅拌均匀后得混合物;
步骤四、将可燃尽物质加入到上述混合均匀的混合物内,并加入一定量的水,然后进行搅拌5-10min,再加入生坯增强剂以及减水剂,继续混合搅拌10-20min,直至完全混合成泥浆料后,备用;
步骤五、将混合成的泥浆料注入到模型中进行成型处理,然后置于室温下静置养护,时间在24-36h,静置完成后,进行脱模处理,得成型模坯,此时成型模坯所含水分大约为35%-38%,脱模后,继续静置12-20h,直至成型模坯所含水分将至20%-30%即可;
步骤六、当成型模坯的水分降低至20%-30%后,将成型模坯放入干燥室进行干燥处理,干燥室的干燥温度在90-110℃,干燥时间为24-48h,当成型模坯所含水分低至2-3%时即可;
步骤七、再将步骤六所得的成型模坯上窑烧制,烧制温度在1600-1700℃,烧制完成后,冷却温度至200℃,保温3-4h时,再冷却至常温即可得低导热耐火砖。
实施例一
本发明所采取的技术方案中,一种低导热耐火砖,该低导热耐火砖的原料按重量份分为:莫来石50份、白毛土15份、铝矾土熟料25份、矿物原料35份、硼化钛12份、粉煤灰17份、球形闭孔珍珠岩26份、可燃尽物质10份、生坯增强剂6份、减水剂2份和余量的水;
其中,矿物原料按重量份分为:蓝精石35份、石英15份、方英石36份、硅线石30份;
其中,可燃尽物质按重量份分为:锯末80份、炭末60份;
进一步的,球形闭孔珍珠岩的导热系数为0.047-0.054W/m·k,堆积密度为0.09-0.16g/cm3。
实施例二
本发明所采取的技术方案中,一种低导热耐火砖,该低导热耐火砖的原料按重量份分为:莫来石50份、白毛土12份、铝矾土熟料20份、矿物原料30份、硼化钛10份、粉煤灰15份、球形闭孔珍珠岩20份、可燃尽物质8份、生坯增强剂5份、减水剂1份和余量的水;
其中,矿物原料按重量份分为:蓝精石30份、石英10份、方英石30份、硅线石25份;
其中,可燃尽物质按重量份分为:锯末70份、炭末50份;
进一步的,球形闭孔珍珠岩的导热系数为0.047-0.054W/m·k,堆积密度为0.09-0.16g/cm3。
实施例三
本发明所采取的技术方案中,一种低导热耐火砖,该低导热耐火砖的原料按重量份分为:莫来石60份、白毛土18份、铝矾土熟料30份、矿物原料40份、硼化钛15份、粉煤灰20份、球形闭孔珍珠岩30份、可燃尽物质12份、生坯增强剂7份、减水剂3份和余量的水;
其中,矿物原料按重量份分为:蓝精石40份、石英20份、方英石40份、硅线石35份;
其中,可燃尽物质按重量份分为:锯末90份、炭末70份;
进一步的,球形闭孔珍珠岩的导热系数为0.047-0.054W/m·k,堆积密度为0.09-0.16g/cm3。
实验测试:采用现有市场常用的耐火砖检测方法对本发明实施例一、实施例二以及实施例三所制备的低导热耐火砖进行检测,其结果如下:
由上述结果可以看出,本发明制备的低导热耐火砖降低了体积密度,而且热传导率低,而且球形闭孔珍珠岩是由拣选的一定粒径的珍珠岩砂在电加热方式下达到一定温度后由内到表面均匀膨胀,膨胀颗粒表面又经瞬间高温熔融,克服表面张力而自由闭合,经降温后形成连续玻质化的颗粒表面,而内部保持着完整的多孔,中空空心结构,具有纯度高、简压强度高、颗粒均匀、吸水率低、易分散性能,所以本发明的制备工艺保障了耐火砖的低导热性能,使其具有耐高温、不易变形的特点。
需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。
Claims (8)
1.一种低导热耐火砖的制备方法,其特征在于,其制备方法包括以下步骤:
步骤一:将一定份量的莫来石以及矿物原料进行粉碎预处理,过90-100目筛,得粉料备用;
步骤二:将一定份量的白毛土、铝矾土熟料以及硼化钛加入到混料机内进行混合搅拌10-15min,然后再通过粉碎搅拌,得混合料;
步骤三、将所得粉料和混合料依次加入到混料机内,进行充分混合搅拌20-30min,转速为500-600r/min,期间依次加入粉煤灰和球形闭孔珍珠岩,搅拌均匀后得混合物;
步骤四、将可燃尽物质加入到上述混合均匀的混合物内,并加入一定量的水,然后进行搅拌5-10min,再加入生坯增强剂以及减水剂,继续混合搅拌10-20min,直至完全混合成泥浆料后,备用;
步骤五、将混合成的泥浆料注入到模型中进行成型处理,然后置于室温下静置养护,时间在24-36h,静置完成后,进行脱模处理,得成型模坯,此时成型模坯所含水分大约为35%-38%,脱模后,继续静置12-20h,直至成型模坯所含水分将至20%-30%即可;
步骤六、当成型模坯的水分降低至20%-30%后,将成型模坯放入干燥室进行干燥处理,当成型模坯所含水分低至2-3%时即可;
步骤七、再将步骤六所得的成型模坯上窑烧制,得低导热耐火砖。
2.根据权利要求1所述的一种低导热耐火砖的制备方法,其特征在于,所述步骤三中加入粉煤灰和球形闭孔珍珠岩时,混料机的转速提升至800-900r/min。
3.根据权利要求1所述的一种低导热耐火砖的制备方法,其特征在于,所述步骤六中干燥室的干燥温度在90-110℃,干燥时间为24-48h。
4.根据权利要求1所述的一种低导热耐火砖的制备方法,其特征在于,所述步骤七中上窑烧制温度在1600-1700℃,烧制完成后,冷却温度至200℃,保温3-4h时,再冷却至常温即可。
5.一种低导热耐火砖,根据权利要求1-4任意一项所述的一种低导热耐火砖的制备方法,其特征在于,该低导热耐火砖的原料按重量份分为:莫来石40-60份、白毛土12-18份、铝矾土熟料20-30份、矿物原料30-40份、硼化钛10-15份、粉煤灰15-20份、球形闭孔珍珠岩20-30份、可燃尽物质8-12份、生坯增强剂5-7份、减水剂1-3份和余量的水。
6.根据权利要求5所述的一种低导热耐火砖,其特征在于,所述矿物原料按重量份分为:蓝精石30-40份、石英10-20分、方英石30-40份、硅线石25-35份。
7.根据权利要求5所述的一种低导热耐火砖,其特征在于,所述可燃尽物质按重量份分为:锯末70-90份、炭末50-70份。
8.根据权利要求5所述的一种低导热耐火砖,其特征在于,所述球形闭孔珍珠岩的导热系数为0.047-0.054W/m·k,堆积密度为0.09-0.16g/cm3。
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