CN113943149A - 一种耐冲刷型高性能无碳砖的制备方法 - Google Patents
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- 239000011449 brick Substances 0.000 title claims abstract description 47
- 238000009991 scouring Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 74
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 65
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 44
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 41
- 239000010431 corundum Substances 0.000 claims abstract description 34
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052596 spinel Inorganic materials 0.000 claims abstract description 24
- 239000011029 spinel Substances 0.000 claims abstract description 24
- 239000011230 binding agent Substances 0.000 claims abstract description 13
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 10
- 239000002131 composite material Substances 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims description 25
- 239000002245 particle Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 14
- 238000002844 melting Methods 0.000 claims description 13
- 230000008018 melting Effects 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 7
- 229910000423 chromium oxide Inorganic materials 0.000 claims description 7
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims description 7
- 239000001095 magnesium carbonate Substances 0.000 claims description 7
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 7
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 7
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000012267 brine Substances 0.000 claims description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 3
- 230000035939 shock Effects 0.000 abstract description 15
- 229910000831 Steel Inorganic materials 0.000 abstract description 10
- 239000010959 steel Substances 0.000 abstract description 10
- 230000003647 oxidation Effects 0.000 abstract description 8
- 238000007254 oxidation reaction Methods 0.000 abstract description 8
- 238000003723 Smelting Methods 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 20
- 229910052799 carbon Inorganic materials 0.000 description 19
- 239000000047 product Substances 0.000 description 10
- 239000002893 slag Substances 0.000 description 10
- 239000011159 matrix material Substances 0.000 description 5
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- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229920002748 Basalt fiber Polymers 0.000 description 2
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 2
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 2
- 230000005496 eutectics Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
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- 238000009628 steelmaking Methods 0.000 description 2
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- 230000000694 effects Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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Abstract
本发明提供一种耐冲刷型高性能无碳砖的制备方法。所述耐冲刷型高性能无碳砖的制备方法包括以下步骤:(1).按照质量份数计算来准备:骨料为50‑70份,细粉为5‑10份、复合结合剂2‑5;(2).所述骨料为亚白刚玉、电熔白刚玉和电熔镁砂,所述细粉为刚玉细粉、尖晶石微粉、a‑Al2O3(氧化铝)微粉、电熔镁砂份粉和化工氧化镁粉;(3).所述亚白刚玉占比为50%,所述电熔白刚玉和细粉占比一共为25%,所述电熔镁砂和细粉占比一共为4%。本发明提供的耐冲刷型高性能无碳砖的制备方法具有具有良好的抗氧化性能、抗钢水冲刷性及热震稳定性能,致使可以满足冶炼需求的优点。
Description
技术领域
本发明属于耐火材料技术领域,尤其涉及一种耐冲刷型高性能无碳砖的制备方法。
背景技术
氧化镁的熔点是2800℃,具有很强的耐高温能力,但其抗热震性、抗渣渗透性差;以石墨为代表的碳素材料也具有很强的耐高温能力,并且其热膨胀系数低,抗热震性十分优异,在高温下与钢水、钢渣不易浸润,将二者按一定的比例复合,组成一种综合性能好的耐火材料——镁碳砖。镁碳砖主要用于炼钢耐火材料,例如转炉、炼钢电炉、钢包。我国现有的镁碳砖一般碳含量>10%,我国冶金行业标准分三档:MT-10A、B、C;MT-14A、B、C;MT-18A、B、C,标准中分别要求碳含量≥10%、≥14%、≥18%,通常符合标准的镁碳砖才能取得良好的使用效果,相关技术中,公开了一种镁碳砖及其制备方法,属于耐火材料制备技术领域。其包括电熔镁砂颗粒60~75份,电熔镁砂细粉10~30份,碳素5~10份,共晶硅铝合金粉1~5份,玄武岩纤维1~3份,结合剂1~3份;将上述原料按比例称量后充分混炼,然后对其进行压制成型,最后烘烤得到镁碳砖。本发明制备方法简单,步骤易于操作,将共晶硅铝合金粉、玄武岩纤维应用到镁碳砖中,提高了基质部分的强度、抗侵蚀性和抗氧化性,同时大量减少金属抗氧化剂的使用,提高了镁碳砖的使用寿命。
但是,上述结构中还存在不足之处,因为在镁碳砖中,碳的存在作用是防止炉渣向砖内浸蚀,而碳本身具有易氧化的特性,当镁碳砖中碳被氧化时,砖的抗浸蚀性会大幅度的下降,加快镁碳砖的损毁,降低其使用寿命,其使用过程中表面更容易氧化脱碳,导致熔渣渗入,使耐火材料组分之间产生烧结,热震稳定性显著降低。
因此,有必要提供一种新的耐冲刷型高性能无碳砖的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具有良好的抗氧化性能、抗钢水冲刷性及热震稳定性能,致使可以满足冶炼需求的耐冲刷型高性能无碳砖的制备方法。
为解决上述技术问题,本发明提供的耐冲刷型高性能无碳砖的制备方法包括以下步骤:
(1).按照质量份数计算来准备:骨料为50-70份,细粉为5-10份、复合结合剂2-5;
(2).所述骨料为亚白刚玉、电熔白刚玉和电熔镁砂,所述细粉为刚玉细粉、尖晶石微粉、a-Al2O3(氧化铝)微粉、电熔镁砂份粉和化工氧化镁粉;
通过加入一定量的Cr2O3(三氧化二铬)细粉,可以来增加MgO.Cr2O3尖晶石的形成,从而有助于提高铝镁不烧砖中液相的黏度、荷重软化温度、热态强度、抗渣渗透性以及抗热震性,并可有效地吸收渣中的FeO,形成铬铁矿复合尖晶石,从而抑制FeO的进一步渗透
通过加入a-Al2O3(氧化铝)微粉,则可以提高基质中的氧化铝的含量,致使可以与基质中的MgO反应生成尖晶石,这种尖晶石很小,能有效阻止熔渣的渗透,同时能够降低砖的显气孔率,提高制品的耐压强度、改善砖的抗钢水冲刷性及热震稳定性;
通过将尖晶石微粉加入,使其能够起到预置一部分尖晶石的作用,进而能够使MgO(氧化镁)与Al2O3(氧化铝)微粉在使用过程中以此为核发生反应,生成MA-MA结合相,从而可以促进烧结,同时尖晶石微粉的加人还能提高热震稳定性。
(3).所述亚白刚玉占比为50%,所述电熔白刚玉和细粉占比一共为25%,所述电熔镁砂和细粉占比一共为4%,其中所述亚白刚玉的粒度为≤5mm,所述电熔白刚玉的粒度为≤3mm,所述细粉的粒度为≤0.044mm,所述电熔镁砂的粒度为≤2mm,所述细粉的粒度为0.074mm。
作为本发明的进一步方案,所述复合结合剂为溶胶和卤水。
作为本发明的进一步方案,成型,所述成型步骤包括如下:
(1).按照配比进行混料;
(2).混料时,先将颗粒料混合均匀后,之后加入结合剂混炼3-5min;
(3).将预先混合好的细料加入上述(2)中继续混炼18-20min;
(4).将上述(3)中混合好的产物倒取出,采用630t摩擦压力机进行成型;
(5).将上述(4)中成型的产物自然干燥24h后,在放置到温度为200-260℃的环境下,烘干12h,然后再到温度为1000-1600℃的环境下,热处理3h后,即可得到无碳砖。
与相关技术相比较,本发明提供的耐冲刷型高性能无碳砖的制备方法具有如下有益效果:
本发明提供一种耐冲刷型高性能无碳砖的制备方法:
1、通过添加Cr2O3(三氧化二铬)细粉、a-Al2O3(氧化铝)微粉和尖晶石微粉,使得可以具有良好的抗氧化性能、抗钢水冲刷性及热震稳定性能,致使可以满足冶炼需求的优点。
具体实施方式
实施例1
耐冲刷型高性能无碳砖的制备方法包括以下步骤:
(1).按照质量份数计算来准备:骨料为50-70份,细粉为5-10份、复合结合剂2-5;
(2).所述骨料为亚白刚玉、电熔白刚玉和电熔镁砂,所述细粉为刚玉细粉、尖晶石微粉、a-Al2O3(氧化铝)微粉、电熔镁砂份粉和化工氧化镁粉;
通过加入一定量的Cr2O3(三氧化二铬)细粉,可以来增加MgO.Cr2O3尖晶石的形成,从而有助于提高铝镁不烧砖中液相的黏度、荷重软化温度、热态强度、抗渣渗透性以及抗热震性,并可有效地吸收渣中的FeO,形成铬铁矿复合尖晶石,从而抑制FeO的进一步渗透
通过加入a-Al2O3(氧化铝)微粉,则可以提高基质中的氧化铝的含量,致使可以与基质中的MgO反应生成尖晶石,这种尖晶石很小,能有效阻止熔渣的渗透,同时能够降低砖的显气孔率,提高制品的耐压强度、改善砖的抗钢水冲刷性及热震稳定性;
通过将尖晶石微粉加入,使其能够起到预置一部分尖晶石的作用,进而能够使MgO(氧化镁)与Al2O3(氧化铝)微粉在使用过程中以此为核发生反应,生成MA-MA结合相,从而可以促进烧结,同时尖晶石微粉的加人还能提高热震稳定性。
(3).所述亚白刚玉占比为50%,所述电熔白刚玉和细粉占比一共为25%,所述电熔镁砂和细粉占比一共为4%,其中所述亚白刚玉的粒度为≤5mm,所述电熔白刚玉的粒度为≤3mm,所述细粉的粒度为≤0.044mm,所述电熔镁砂的粒度为≤2mm,所述细粉的粒度为0.074mm。
2、根据权利要求1所述的耐冲刷型高性能无碳砖的制备方法,其特征在于,所述复合结合剂为溶胶和卤水。
3、根据权利要求1所述的耐冲刷型高性能无碳砖的制备方法,其特征在于,成型,所述成型步骤包括如下:
(1).按照配比进行混料;
(2).混料时,先将颗粒料混合均匀后,之后加入结合剂混炼3-5min;
(3).将预先混合好的细料加入上述(2)中继续混炼18-20min;
(4).将上述(3)中混合好的产物倒取出,采用630t摩擦压力机进行成型;
(5).将上述(4)中成型的产物自然干燥24h后,在放置到温度为200-260℃的环境下,烘干12h,然后再到温度为1000-1600℃的环境下,热处理3h后,即可得到无碳砖。
与相关技术相比较,本发明提供的耐冲刷型高性能无碳砖的制备方法具有如下有益效果:
本发明提供一种耐冲刷型高性能无碳砖的制备方法,通过添加Cr2O3(三氧化二铬)细粉、a-Al2O3(氧化铝)微粉和尖晶石微粉,使得可以具有良好的抗氧化性能、抗钢水冲刷性及热震稳定性能,致使可以满足冶炼需求的优点。
实施例2
一种耐冲刷型高性能无碳砖的制备方法包括以下步骤:
(1).按照所述亚白刚玉占比为60%,所述电熔白刚玉和细粉占比一共为20%,所述电熔镁砂和细粉占比一共为3%,其中所述亚白刚玉的粒度为≤5mm,所述电熔白刚玉的粒度为≤3mm,所述细粉的粒度为≤0.044mm,所述电熔镁砂的粒度为≤2mm,所述细粉的粒度为0.074mm的配比进行混料;
(2).混料时,先将颗粒料混合均匀后,之后加入结合剂混炼3-5min;
(3).将预先混合好的细料加入上述(2)中继续混炼18-20min;
(4).将上述(3)中混合好的产物倒取出,采用630t摩擦压力机进行成型;
(5).将上述(4)中成型的产物自然干燥24h后,在放置到温度为200-260℃的环境下,烘干12h,然后再到温度为1000-1600℃的环境下,热处理3h后,即可得到无碳砖。
通过添加Cr2O3(三氧化二铬)细粉、a-Al2O3(氧化铝)微粉和尖晶石微粉,使得可以具有良好的抗氧化性能、抗钢水冲刷性及热震稳定性能,致使可以满足冶炼需求的优点。
实施例3
一种耐冲刷型高性能无碳砖的制备方法,包括以下步骤:
(1).按照所述亚白刚玉占比为40%,所述电熔白刚玉和细粉占比一共为30%,所述电熔镁砂和细粉占比一共为6%,其中所述亚白刚玉的粒度为≤5mm,所述电熔白刚玉的粒度为≤3mm,所述细粉的粒度为≤0.044mm,所述电熔镁砂的粒度为≤2mm,所述细粉的粒度为0.074mm的配比进行混料;
(2).混料时,先将颗粒料混合均匀后,之后加入结合剂混炼3-5min;
(3).将预先混合好的细料加入上述(2)中继续混炼18-20min;
(4).将上述(3)中混合好的产物倒取出,采用630t摩擦压力机进行成型;
(5).将上述(4)中成型的产物自然干燥24h后,在放置到温度为200-260℃的环境下,烘干12h,然后再到温度为1000-1600℃的环境下,热处理3h后,即可得到无碳砖。
通过添加Cr2O3(三氧化二铬)细粉、a-Al2O3(氧化铝)微粉和尖晶石微粉,使得可以具有良好的抗氧化性能、抗钢水冲刷性及热震稳定性能,致使可以满足冶炼需求的优点。
Claims (3)
1.一种耐冲刷型高性能无碳砖的制备方法,其特征在于,包括以下步骤:
(1).按照质量份数计算来准备:骨料为50-70份,细粉为5-10份、复合结合剂2-5;
(2).所述骨料为亚白刚玉、电熔白刚玉和电熔镁砂,所述细粉为刚玉细粉、尖晶石微粉、a-Al2O3(氧化铝)微粉、电熔镁砂份粉、化工氧化镁粉和Cr2O3(三氧化二铬)细粉;
(3).所述亚白刚玉占比为50%,所述电熔白刚玉和细粉占比一共为25%,所述电熔镁砂和细粉占比一共为4%,其中所述亚白刚玉的粒度为≤5mm,所述电熔白刚玉的粒度为≤3mm,所述细粉的粒度为≤0.044mm,所述电熔镁砂的粒度为≤2mm,所述细粉的粒度为0.074mm。
2.根据权利要求1所述的耐冲刷型高性能无碳砖的制备方法,其特征在于,所述复合结合剂为溶胶和卤水。
3.根据权利要求1所述的耐冲刷型高性能无碳砖的制备方法,其特征在于,成型,所述成型步骤包括如下:
(1).按照配比进行混料;
(2).混料时,先将颗粒料混合均匀后,之后加入结合剂混炼3-5min;
(3).将预先混合好的细料加入上述(2)中继续混炼18-20min;
(4).将上述(3)中混合好的产物倒取出,采用630t摩擦压力机进行成型;
(5).将上述(4)中成型的产物自然干燥24h后,在放置到温度为200-260℃的环境下,烘干12h,然后再到温度为1000-1600℃的环境下,热处理3h后,即可得到无碳砖。
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