CN106830959B - 一种高效保温捣打料 - Google Patents
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Abstract
本发明涉及一种高效保温捣打料,以改性珍珠岩,二氧化硅溶胶和微粉氧化铝为原材料,按照重量百分比为改性珍珠岩62%,二氧化硅溶胶30%,微粉氧化铝8%制作而成。本发明将珍珠岩改性后用作制备高效保温捣打料的原材料,制备工艺简单易实现,原料不含有机物,无毒无害,对人体和环境友好,产品不易团聚,易成型,得到的捣打料适用于高温窑炉保温层不易施工的部位,密度和热导率远远小于现有捣打料,且具有高效的保温作用,填补了高温窑炉保温层捣打料技术领域的空白;并且由于减轻了重量,大大降低了钢结构的承重,综合性能得到大幅度提升。
Description
技术领域
本发明属于保温材料技术领域,特别是一种用于高温窑炉保温层的超轻不定形耐火材料,具体是一种高效保温捣打料。
背景技术
在工业领域,凡是高于常温环境下的窑体和炉体,尤其是高温窑、高温熔炉,为了防止热量流失,在炉体或窑体内部采用保温材料。工业窑炉的结构从内到外一般是耐火工作层、保温层、钢架结构层,耐火工作层位于窑炉的最内层,直接与高温介质接触还可能受到侵蚀和冲刷,因此,耐火工作层材料必须具备很高的耐火性能和高温强度;保温层位于窑炉的中间层,不直接与高温介质接触,主要起到保温,防止热量流失的作用,对保温层的要求一般是:热导率小,密度小,保温效果好等,保温层的构建中一般使用保温性能较好的保温砖,而在异型部位或者不方便施工的部位,就要使用捣打料。
目前并没有直接面对保温层的捣打料,现有的捣打料多适用于耐火工作层,直接与高温介质接触,密度很大,热导率很高,基本没有保温效果。本发明填补了这一领域的空白。
发明内容
本发明所要解决的技术问题便是针对上述现有技术的不足,提供一种高效保温捣打料,适用于高温窑炉的保温层,不直接与高温介质接触,原料全部为无机无毒物质,不含有机原料,无毒无害,并且制备工艺简单易实现,易成型,污染少,产品不易团聚,得到的捣打料密度小、重量轻、热导率小,保温效果好,强度高,使用寿命长。
本发明的目的及解决其技术问题是采用以下技术方案来实现的。
依据本发明提出的一种高效保温捣打料,其原料及各原料的重量百分比为:
改性珍珠岩 45-75%,
二氧化硅溶胶 15-45%,
微粉氧化铝 5-15%。
本发明的目的及解决其技术问题还可采用以下技术措施进一步实现。
前述的一种高效保温捣打料,其中,各原料及其重量百分比为:
改性珍珠岩 62%,
二氧化硅溶胶 30%,
微粉氧化铝 8%。
进一步地,所述二氧化硅溶胶为低碱高粘度纳米级二氧化硅溶胶,其pH=9-10;所述微粉氧化铝为α-Al2O3超微粉,其d50=2μm。
进一步地,所述改性珍珠岩是将珍珠岩矿石经过改性得到,具体的改性方法为:将珍珠岩矿石粉碎至粒径为20-30目,然后在1010-1030℃下进行膨化处理,再用复合酸浸泡24h,将珍珠岩从复合酸中分离出来,然后烘干即可。
进一步地,所述的复合酸为硝酸、磷酸、甲酸、盐酸、三氯乙酸中的两种或两种以上混合。
进一步地,所述高效保温捣打料的制备方法具体为:将改性珍珠岩、二氧化硅溶胶和微粉氧化铝按照重量配比取料,放入搅拌机中搅拌均匀,然后进行密封包装即可。本发明的捣打料出厂保质期3个月。
本发明的特点在于:
(1)、珍珠岩矿石本身不是耐火保温材料,本发明人通过改性将不具备耐火材料特性的珍珠岩用作制备不定形保温材料-高效保温捣打料的原料,取得了很好的效果。珍珠岩矿石的化学成分为:SiO2、Al2O3、Fe2O3、CaO、K2O、Na2O、MgO、H2O,由于含有碱金属氧化物,使珍珠岩矿石的耐火保温性能非常不好,本发明通过改性降低珍珠岩中的碱金属含量,提高了珍珠岩的耐高温性能,由于改性后的珍珠岩具有质轻、密度低、导热系数低、耐高温性好的优点,作为捣打料的原料,大大降低了捣打料的体积密度和热导率。
(2)本发明采用的微粉氧化铝为α-Al2O3超微粉,粉料中氧化铝颗粒的d50=2μm,粒径小,分布均匀,提高了捣打料的最低共熔点,从而提高了捣打料的保温性能。
(3)现有捣打料多适用于耐火工作层,密度多在1.4g/cm3以上,热导率多在0.4w.(m.k)-1以上,基本没有保温效果。
本发明的高效保温捣打料密度为0.22g/cm3,热导率为0.06w.(m.k)-1,相比现有的捣打料,本发明的密度远远小于现有捣打料的密度,并具有更低的热导率,在大大降低炉体重量的同时,提高了炉体的保温性能,降低了对炉体钢结构的承重要求,其保温效果至少提高5倍以上。
综上所述,本发明一种高效保温捣打料在技术上有显著的进步,并具有明显的积极效果,诚为一新颖、进步、实用的新设计。
上述说明仅是本发明技术方案的概述,为了能够更清楚了解本发明的技术手段,而可依照说明书的内容予以实施,并且为了让本发明的上述和其他目的、特征和优点能够更明显易懂,以下特举较佳实施例,详细说明如下。
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具体实施方式
为更进一步阐述本发明为达成预定发明目的所采取的技术手段及功效,以下结合较佳实施例,对依据本发明提出的一种高效保温捣打料,其具体实施方式、结构、特征及其功效,详细说明如后。
本发明是一种高效保温捣打料,主要是用于高温窑炉保温层异型部位和不易施工的部位,是一种新型的轻质高保温材料,具有热导率小,密度小,保温效果好等优点,产品不含有毒有害、高挥发性物质,对人体和环境友好。
本发明的高效保温捣打料由以下成分按照重量百分比组成:
改性珍珠岩 45-75%,
二氧化硅溶胶 15-45%,
微粉氧化铝 5-15%。
较佳地,高效保温捣打料的原料配比为:
改性珍珠岩 62%,
二氧化硅溶胶 30%,
微粉氧化铝 8%。
进一步地,所述二氧化硅溶胶为低碱高粘度纳米级二氧化硅溶胶,其pH=9-10;微粉氧化铝为α-Al2O3超微粉,其氧化铝粉体颗粒d50=2μm。
进一步地,所述改性珍珠岩是将普通珍珠岩矿石经过改性得到,具体的改性方法为:将普通珍珠岩矿石粉碎至粒径为20-30目,然后在1010-1030℃下进行瞬间膨化处理,再用复合酸浸泡24h,将珍珠岩从复合酸中分离出来,然后烘干即可。
进一步地,所述的复合酸为硝酸、磷酸、甲酸、盐酸、三氯乙酸中的两种或两种以上混合。
本发明的高效保温捣打料制备方法简单:将改性珍珠岩、二氧化硅溶胶和微粉氧化铝按照重量配比取料,放入搅拌机中搅拌均匀,然后进行密封包装即可,出厂保质期为3个月,工艺过程简单易操作,对制备条件没有特殊要求,容易实现。
具体实施例:
实施例1
原料配比(按重量百分比):改性珍珠岩45%,二氧化硅溶胶40%,微粉氧化铝15%;其中,二氧化硅溶胶的pH为9,微分氧化铝粉体颗粒的d50=2μm;
改性珍珠岩的制备:将珍珠岩矿石粉碎至粒径为20目,然后在1030℃下进行瞬间膨化处理,再用硝酸和盐酸形成的复合酸浸泡24h,将珍珠岩从复合酸中分离出来,烘干即可。
捣打料的制备:将三种原料按照比例放入搅拌机中混合搅拌均匀。
实施例2
原料配比(按重量百分比):改性珍珠岩50%,二氧化硅溶胶45%,微粉氧化铝5%;其中,二氧化硅溶胶的pH为10,微分氧化铝粉体颗粒的d50=2μm;
改性珍珠岩的制备:将珍珠岩矿石粉碎至粒径为20目,然后在1020℃下进行瞬间膨化处理,再用盐酸和磷酸形成的复合酸浸泡24h,将珍珠岩从复合酸中分离出来,烘干即可。
捣打料的制备:将三种原料按照比例放入搅拌机中混合搅拌均匀。
实施例3
原料配比(按重量百分比):改性珍珠岩62%,二氧化硅溶胶30%,微粉氧化铝8%;其中,二氧化硅溶胶的pH为9,微分氧化铝粉体颗粒的d50=2μm;
改性珍珠岩的制备:将珍珠岩矿石粉碎至粒径为30目,然后在1010℃下进行瞬间膨化处理,再用三氯乙酸和盐酸形成的复合酸浸泡24h,将珍珠岩从复合酸中分离出来,烘干即可。
捣打料的制备:将三种原料按照比例放入搅拌机中混合搅拌均匀。
实施例4
原料配比(按重量百分比):改性珍珠岩65%,二氧化硅溶胶30%,微粉氧化铝5%;其中,二氧化硅溶胶的pH为10,微分氧化铝粉体颗粒的d50=2μm;
改性珍珠岩的制备:将珍珠岩矿石粉碎至粒径为30目,然后在1030℃下进行瞬间膨化处理,再用甲酸和盐酸和三氯乙酸形成的复合酸浸泡24h,将珍珠岩从复合酸中分离出来,烘干即可。
捣打料的制备:将三种原料按照比例放入搅拌机中混合搅拌均匀。
实施例5
原料配比(按重量百分比):改性珍珠岩75%,二氧化硅溶胶15%,微粉氧化铝10%;其中,二氧化硅溶胶的pH为10,微分氧化铝粉体颗粒的d50=2μm;
改性珍珠岩的制备:将珍珠岩矿石粉碎至粒径为20目,然后在1020℃下进行瞬间膨化处理,再用甲酸和盐酸形成的复合酸浸泡24h,将珍珠岩从复合酸中分离出来,烘干即可。
捣打料的制备:将三种原料按照比例放入搅拌机中混合搅拌均匀。
各实施例的原料组成及改性珍珠岩所用的复合酸成分见下表1:
表1.各实施例原料组成及改性珍珠岩所用的复合酸成分
将以上5个实施例制备的捣打料制成160×40×40的试块进行检测;将市售的捣打料按照同样的方法进行检测,测试性能结果见表2:
表2.各实施例捣打料及现有捣打料的性能测试结果
通过对比可知:现有捣打料密度大、热导率大,本发明通过优选原料、配方和工艺,采用全无机原料得到了一种高效保温捣打料,该捣打料密度更小,热导率更低,密度比现有市售的捣打料减小了69%以上,热导率比现有市售的捣打料减小了75%以上。保温性能更好,完全不含有机物,无毒无害,对人体和环境友好,不产生毒副作用。本发明的高效保温捣打料由于大大降低了密度,减轻了捣打料的重量,因此在运输时可以节省一大笔费用,并且降低了对窑炉钢结构、设备基础的承重要求,进一步降低企业成本,提高经济效益、社会效益。
以上所述,仅是本发明的较佳实施例而已,并非对本发明作任何形式上的限制,虽然本发明已以较佳实施例揭露如上,然而并非用以限定本发明,任何熟悉本专业的技术人员,在不脱离本发明技术方案范围内,当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例,但凡是未脱离本发明技术方案的内容,依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰,均仍属于本发明技术方案的范围内。
Claims (1)
1.一种高效保温捣打料,其特征在于由以下原料按照重量百分比制作而成:
改性珍珠岩 62%,
二氧化硅溶胶 30%,
微粉氧化铝 8%;
所述二氧化硅溶胶为低碱高粘度纳米级二氧化硅溶胶,其pH=9;所述微粉氧化铝为α-Al2O3超微粉,其d50=2μm;所述改性珍珠岩的改性方法为:将珍珠岩矿石粉碎后在1010℃下进行膨化处理,再用三氯乙酸和盐酸形成的复合酸浸泡24h后,将珍珠岩从复合酸中分离出来,烘干即可;
将三种原料按照比例放入搅拌机中混合搅拌均匀即可得到所述的高效保温捣打料,所得高效保温捣打料的密度为0.22g/cm3,常温耐压强度为0.46MPa,热导率为0.06w.(m.k)-1;所述保温捣打料用于高温窑炉保温层。
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