CN116396086A - 一种环保型低碳铝镁尖晶石砖及其制备方法 - Google Patents
一种环保型低碳铝镁尖晶石砖及其制备方法 Download PDFInfo
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- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 86
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Abstract
本发明提供一种环保型低碳铝镁尖晶石砖及其制备方法。所述环保型低碳铝镁尖晶石砖,按照重量份数计算,包括:复合石墨化炭黑1‑4份、亚白刚玉50‑65份、电熔白刚玉10‑25份、电熔镁砂5‑7.5份、刚玉细粉1‑2.5份、尖晶石细粉0.5‑3份、活性α‑氧化铝微粉3‑6份、电熔镁砂粉3‑5.5份、复合结合剂3.5‑5.5和外加剂2.5‑3.5;其中,复合石墨化炭黑≤0.05;亚白刚玉的颗粒≤5;电熔白刚玉≤3;电熔镁砂≤2;刚玉细粉1‑2.5份≤3;尖晶石细粉≤1;电熔镁砂粉≤2。本发明提供的环保型低碳铝镁尖晶石砖及其制备方法没有采用酚醛树脂,因此在加热时就不会产生有害气体而污染环境,而采用复合结合剂结合的低碳镁碳砖其使用寿命是传统镁铬砖的两倍的优点。
Description
技术领域
本发明属于低碳铝镁尖晶石砖技术领域,尤其涉及一种环保型低碳铝镁尖晶石砖及其制备方法。
背景技术
随着炼钢技术的飞速发展,冶炼低碳钢、低碳钢等钢种比例的增加,对炼钢用耐材的低碳、无碳化要求也越来越高。目前冶炼纯净钢的钢包用耐火材料原料主要是以刚玉、电熔镁砂和特级矾土为主,但是这些原料都需要高温烧成获得,对环境造成极大的污染,且原料成本高;目前钢包用铝镁碳砖普遍使用的结合剂为酚醛树脂,酚醛树脂加热后会产生有害气体甲醛和苯酚,危害人体健康并造成环境污染;利用可回收材料制备环保型碳砖的问题亟需解决。
CN201310559723.0公开了一种精炼钢包衬用优质无碳铝镁尖晶石砖及其制备方法,其原料组成为亚白刚玉,电熔白刚玉颗粒和细粉,尖晶石细粉,电熔镁砂颗粒和细粉,添加剂,溶胶和卤水结合剂;通过引入活性与惰性的Al2O3和MgO,选用复合结合剂,采用摩擦机成型不烧结工艺,可有效适时控制其在使用过程中的平衡与未平衡的原位反应,使Al2O3-MgO系钢包衬砖的抗渗透、耐侵蚀性能与抗剥落性能同时得到提高,实现提高钢包使用寿命的目的,获得的优质无碳铝镁尖晶石砖的理化指标中显气孔率≤14%,体积密度≥3.0g/cm3,常温耐压强度≥40MPa,线变化率(1600℃,3h)为0-+0.6%。CN201110376505.4公开了一种浮法玻璃全氧燃烧熔窑用高纯铝镁尖晶石砖耐火材料,包括以下原料:超高纯铝镁尖晶石骨料,超高纯铝镁尖晶石细粉,烧结剂,高纯氧化铝微粉,结合剂,获得的高纯铝镁尖晶石砖耐火材料体积密度为3.06g/cm3,可以大大减轻窑体重量,减轻重量达30-60%,同时减少热容量,降耗增效;其抗热震性能好,抗碱性能优良,用超高纯铝镁尖晶石砖砌筑的窑炉使用寿命因而得到极大的提高。但是都未提及对环境造成极大的污染,酚醛树脂加热后会产生有害气体污染环境的技术问题。
因此,有必要提供一种新的环保型低碳铝镁尖晶石砖及其制备方法解决上述技术问题。
发明内容
本发明解决的技术问题是提供一种没有采用酚醛树脂,因此在加热时就不会产生有害气体而污染环境,而采用复合结合剂结合的低碳镁碳砖其使用寿命是传统镁铬砖的两倍的环保型低碳铝镁尖晶石砖及其制备方法。
为解决上述技术问题,本发明提供的环保型低碳铝镁尖晶石砖,按照重量份数计算,包括:复合石墨化炭黑1-4份、亚白刚玉50-65份、电熔白刚玉10-25份、电熔镁砂5-7.5份、刚玉细粉1-2.5份、尖晶石细粉0.5-3份、活性α-氧化铝微粉3-6份、电熔镁砂粉3-5.5份、复合结合剂3.5-5.5和外加剂2.5-3.5;
其中,复合石墨化炭黑≤0.05;
亚白刚玉的颗粒≤5;
电熔白刚玉≤3;
电熔镁砂≤2;
刚玉细粉1-2.5份≤3;
尖晶石细粉≤1;
电熔镁砂粉≤2。
作为本发明的进一步方案,所述亚白刚玉的Al2O3含量=97.64%,SiO2含量=0.50%和Fe2O3含量=0.60。
作为本发明的进一步方案,所述电熔白刚玉的Al2O3含量=99.1,MgO含量=0.03,CaO含量=0.18和SiO2含量=0.25。
作为本发明的进一步方案,所述电熔镁砂的MgO含量=97.7,CaO含量1.10,SiO2含量=1.01和N2O3含量=0.09。
作为本发明的进一步方案,所述复合结合剂为纳米炭纤维。
作为本发明的进一步方案,所述外加剂为AIN和Si3N4的一种。
作为本发明的进一步方案,所述AIN在含碳材料中氧化时,会反应生成Al2O3并还原出C,起到防氧化作用,反应式如下:
2AlN(s)+2CO(g)=Al2O3(s)+N2(g)
β-Si3N4具有化学稳定性和耐热冲击性好,高温强度和耐磨损性等优异性能,它在含碳材料中氧化时,可以发生如下反应,最后生成SiO2(s)并还原出C(s):
Si3N4+6CO=3SiO2(s)+2N2+6C(s)。
作为本发明的进一步方案,所述Si3N4在含碳材料烧成时,Si3N4表面或边缘与Al粉、碳反应生成Al2O3、AlN、SiC或其它复合物以及一些类似组织的固溶液,加入的Si3N4会均匀分布于基质中,可使材料的氧化速度变慢,进而提高抗氧化性能。
作为本发明的进一步方案,所述石墨化炭黑是采用炭黑和金属为原料,采用自蔓延(SHS)法合成具有纳米尺度的复合石墨化炭黑。
一种基于权利要求1所述的环保型低碳铝镁尖晶石砖制备方法,包括以下步骤:
S1.按方案配料后进行颗粒混料,先将颗粒料混合均匀,得到颗粒混合料;
S2.将复合结合剂加入到颗粒混合料内继续进行混炼,时间为3~5mi n;
S3.按方案配料后进行细粉混料,混合均匀后,得到细粉混合料,然后将细粉混合料加入到颗粒混合料中继续混炼,时间为20mi n,得到浆料;
S4.将浆料放置到摩擦压力机进行成型,得到砖胚;
S5.将胚胎放置到烘干机内进行热处理,温度为200℃,时间为12h,致使得到环保型低碳铝镁尖晶石砖。
与相关技术相比较,本发明提供的环保型低碳铝镁尖晶石砖及其制备方法具有如下有益效果:
1、本发明没有采用酚醛树脂,因此在加热时就不会产生有害气体而污染环境;
2、本发明采用复合结合剂结合的低碳镁碳砖其使用寿命是传统镁铬砖的两倍。
附图说明
为了便于本领域技术人员理解,下面结合附图对本发明作进一步的说明。
图1为本发明的数据对比示意图。
具体实施方式
请结合参阅图1,其中,图1为本发明的数据对比示意图。环保型低碳铝镁尖晶石砖,按照重量份数计算,包括:复合石墨化炭黑1-4份、亚白刚玉50-65份、电熔白刚玉10-25份、电熔镁砂5-7.5份、刚玉细粉1-2.5份、尖晶石细粉0.5-3份、活性α-氧化铝微粉3-6份、电熔镁砂粉3-5.5份、复合结合剂3.5-5.5和外加剂2.5-3.5;
其中,复合石墨化炭黑≤0.05;
亚白刚玉的颗粒≤5;
电熔白刚玉≤3;
电熔镁砂≤2;
刚玉细粉1-2.5份≤3;
尖晶石细粉≤1;
电熔镁砂粉≤2。
所述亚白刚玉的Al2O3含量=97.64%,SiO2含量=0.50%和Fe2O3含量=0.60。
所述电熔白刚玉的Al2O3含量=99.1,MgO含量=0.03,CaO含量=0.18和SiO2含量=0.25。
所述电熔镁砂的MgO含量=97.7,CaO含量1.10,SiO2含量=1.01和Fe2O3含量=0.09。
所述复合结合剂为纳米炭纤维。
所述外加剂为AIN和Si3N4的一种。
所述AIN在含碳材料中氧化时,会反应生成Al2O3并还原出C,起到防氧化作用,反应式如下:
2AlN(s)+2CO(g)=Al2O3(s)+N2(g)
β-Si3N4具有化学稳定性和耐热冲击性好,高温强度和耐磨损性等优异性能,它在含碳材料中氧化时,可以发生如下反应,最后生成SiO2(s)并还原出C(s):
Si3N4+6CO=3SiO2(s)+2N2+6C(s)。
所述Si3N4在含碳材料烧成时,Si3N4表面或边缘与Al粉、碳反应生成Al2O3、AlN、SiC或其它复合物以及一些类似组织的固溶液,加入的Si3N4会均匀分布于基质中,可使材料的氧化速度变慢,进而提高抗氧化性能。
所述石墨化炭黑是采用炭黑和金属为原料,采用自蔓延(SHS)法合成具有纳米尺度的复合石墨化炭黑。
一种环保型低碳铝镁尖晶石砖制备方法,其特征在于:包括以下步骤:
S1.按方案配料后进行颗粒混料,先将颗粒料混合均匀,得到颗粒混合料;
S2.将复合结合剂加入到颗粒混合料内继续进行混炼,时间为3~5mi n;
S3.按方案配料后进行细粉混料,混合均匀后,得到细粉混合料,然后将细粉混合料加入到颗粒混合料中继续混炼,时间为20mi n,得到浆料;
S4.将浆料放置到摩擦压力机进行成型,得到砖胚;
S5.将胚胎放置到烘干机内进行热处理,温度为200℃,时间为12h,致使得到环保型低碳铝镁尖晶石砖。
图1中MC1是由复合结合剂制备的低碳镁碳砖,MC2 MC4是由酚醛树脂结合、具有不同碳含量的MgOC砖,在MC1、MC4中都加有少量的金属,MR1和MR2为直接结合镁铬砖,MD1为烧成白云石砖。
由图1可知,与酚醛树脂结合的镁碳砖相比,由复合结合剂结合的低碳镁碳砖具有高的高温抗折强度及低热导率,而抗侵蚀性及抗热震性则与wc=15%的传统MgO C砖基本相当,与镁铬砖及白云石砖相比,具有更好的抗渣渗透性,所以这种低碳镁碳砖能有效地抵抗结构剥落,这种采用复合结合剂结合的低碳镁碳砖其使用寿命是传统镁铬砖的两倍。
且因为没有采用酚醛树脂,因此在加热时就不会产生有害气体而污染环境。
实施例1
一种环保型低碳铝镁尖晶石砖制备方法,其原料组分和具体重量份如下:
按照重量份数计,包括复合石墨化炭黑2份、亚白刚玉55份、电熔白刚玉12份、电熔镁砂5.2份、刚玉细粉1.2份、尖晶石细粉1份、活性α-氧化铝微粉2份、电熔镁砂粉2份、复合结合剂4份和外加剂3份;
所述复合结合剂为纳米炭纤维;
所述所述外加剂为AIN和Si3N4的一种;
步骤如下:
S1.按方案配料后进行颗粒混料,先将颗粒料混合均匀,得到颗粒混合料;
S2.将复合结合剂加入到颗粒混合料内继续进行混炼,时间为3~5mi n;
S3.按方案配料后进行细粉混料,混合均匀后,得到细粉混合料,然后将细粉混合料加入到颗粒混合料中继续混炼,时间为20mi n,得到浆料;
S4.将浆料放置到摩擦压力机进行成型,得到砖胚;
S5.将胚胎放置到烘干机内进行热处理,温度为200℃,时间为12h,致使得到环保型低碳铝镁尖晶石砖。
实施例2
一种环保型低碳铝镁尖晶石砖制备方法,其原料组分和具体重量份如下:
按照重量份数计,包括复合石墨化炭黑1份、亚白刚玉60份、电熔白刚玉13份、电熔镁砂4份、刚玉细粉1份、尖晶石细粉0.7份、活性α-氧化铝微粉5份、电熔镁砂粉4份、复合结合剂3份和外加剂2.5份;
所述复合结合剂为纳米炭纤维;
所述所述外加剂为AIN和Si3N4的一种;
步骤如下:
S1.按方案配料后进行颗粒混料,先将颗粒料混合均匀,得到颗粒混合料;
S2.将复合结合剂加入到颗粒混合料内继续进行混炼,时间为3~5min;
S3.按方案配料后进行细粉混料,混合均匀后,得到细粉混合料,然后将细粉混合料加入到颗粒混合料中继续混炼,时间为20mi n,得到浆料;
S4.将浆料放置到摩擦压力机进行成型,得到砖胚;
S5.将胚胎放置到烘干机内进行热处理,温度为200℃,时间为12h,致使得到环保型低碳铝镁尖晶石砖。
实施例3
一种环保型低碳铝镁尖晶石砖制备方法,其原料组分和具体重量份如下:
按照重量份数计,包括复合石墨化炭黑1.5份、亚白刚玉56份、电熔白刚玉15份、电熔镁砂5.4份、刚玉细粉1份、尖晶石细粉0.7份、活性α-氧化铝微粉4份、电熔镁砂粉3.5份、复合结合剂4份和外加剂2.7份;
所述复合结合剂为纳米炭纤维;
所述所述外加剂为AIN和Si3N4的一种;
步骤如下:
S1.按方案配料后进行颗粒混料,先将颗粒料混合均匀,得到颗粒混合料;
S2.将复合结合剂加入到颗粒混合料内继续进行混炼,时间为3~5mi n;
S3.按方案配料后进行细粉混料,混合均匀后,得到细粉混合料,然后将细粉混合料加入到颗粒混合料中继续混炼,时间为20mi n,得到浆料;
S4.将浆料放置到摩擦压力机进行成型,得到砖胚;
S5.将胚胎放置到烘干机内进行热处理,温度为200℃,时间为12h,致使得到环保型低碳铝镁尖晶石砖。
实施例一至实施例三为环保型低碳铝镁尖晶石砖的原料成份有所区别,区别在于:实施例一至实施例五的成份相同,成份参数不同。
以上所述,仅为本发明较佳的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,根据本发明的技术方案及其发明构思加以等同替换或改变,都应涵盖在本发明的保护范围之内。
Claims (10)
1.一种环保型低碳铝镁尖晶石砖,其特征在于,按照重量份数计算,包括:
复合石墨化炭黑1-4份、亚白刚玉50-65份、电熔白刚玉10-25份、电熔镁砂5-7.5份、刚玉细粉1-2.5份、尖晶石细粉0.5-3份、活性α-氧化铝微粉3-6份、电熔镁砂粉3-5.5份、复合结合剂3.5-5.5和外加剂2.5-3.5;
其中,复合石墨化炭黑≤0.05;
亚白刚玉的颗粒≤5;
电熔白刚玉≤3;
电熔镁砂≤2;
刚玉细粉1-2.5份≤3;
尖晶石细粉≤1;
电熔镁砂粉≤2。
2.根据权利要求1所述的环保型低碳铝镁尖晶石砖,其特征在于:所述亚白刚玉的Al2O3含量=97.64%,SiO2含量=0.50%和Fe2O3含量=0.60。
3.根据权利要求1所述的环保型低碳铝镁尖晶石砖,其特征在于:所述电熔白刚玉的Al2O3含量=99.1,MgO含量=0.03,CaO含量=0.18和SiO2含量=0.25。
4.根据权利要求1所述的环保型低碳铝镁尖晶石砖,其特征在于:所述电熔镁砂的MgO含量=97.7,CaO含量1.10,SiO2含量=1.01和Fe2O3含量=0.09。
5.根据权利要求1所述的环保型低碳铝镁尖晶石砖,其特征在于:所述复合结合剂为纳米炭纤维。
6.根据权利要求1所述的环保型低碳铝镁尖晶石砖,其特征在于:所述外加剂为AIN和Si3N4的一种。
7.根据权利要求1所述的环保型低碳铝镁尖晶石砖,其特征在于:所述AIN在含碳材料中氧化时,会反应生成Al2O3并还原出C,起到防氧化作用,反应式如下:
2AlN(s)+2CO(g)=Al2O3(s)+N2(g)
β-Si3N4具有化学稳定性和耐热冲击性好,高温强度和耐磨损性等优异性能,它在含碳材料中氧化时,可以发生如下反应,最后生成SiO2(s)并还原出C(s):
Si3N4+6CO=3SiO2(s)+2N2+6C(s)。
8.根据权利要求7所述的环保型低碳铝镁尖晶石砖,其特征在于:所述Si3N4在含碳材料烧成时,Si3N4表面或边缘与Al粉、碳反应生成Al2O3、AlN、SiC或其它复合物以及一些类似组织的固溶液,加入的Si3N4会均匀分布于基质中,可使材料的氧化速度变慢,进而提高抗氧化性能。
9.根据权利要求1所述的环保型低碳铝镁尖晶石砖,其特征在于:所述石墨化炭黑是采用炭黑和金属为原料,采用自蔓延(SHS)法合成具有纳米尺度的复合石墨化炭黑。
10.一种基于权利要求1所述的环保型低碳铝镁尖晶石砖制备方法,其特征在于:包括以下步骤:
S1.按方案配料后进行颗粒混料,先将颗粒料混合均匀,得到颗粒混合料;
S2.将复合结合剂加入到颗粒混合料内继续进行混炼,时间为3~5min;
S3.按方案配料后进行细粉混料,混合均匀后,得到细粉混合料,然后将细粉混合料加入到颗粒混合料中继续混炼,时间为20min,得到浆料;
S4.将浆料放置到摩擦压力机进行成型,得到砖胚;
S5.将胚胎放置到烘干机内进行热处理,温度为200℃,时间为12h,致使得到环保型低碳铝镁尖晶石砖。
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