CN110723978A - 用于钢包永久层的微孔莫来石砖及其制备方法 - Google Patents
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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 title claims abstract description 72
- 229910052863 mullite Inorganic materials 0.000 title claims abstract description 72
- 239000011449 brick Substances 0.000 title claims abstract description 51
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 22
- 239000010959 steel Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 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 24
- 239000004927 clay Substances 0.000 claims abstract description 23
- 229910052903 pyrophyllite Inorganic materials 0.000 claims abstract description 20
- 239000011324 bead Substances 0.000 claims abstract description 19
- 238000007667 floating Methods 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 238000009826 distribution Methods 0.000 claims abstract description 6
- 239000011230 binding agent Substances 0.000 claims abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 12
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- 229910052681 coesite Inorganic materials 0.000 claims description 7
- 229910052906 cristobalite Inorganic materials 0.000 claims description 7
- 239000004014 plasticizer Substances 0.000 claims description 7
- 229910052682 stishovite Inorganic materials 0.000 claims description 7
- 229910052905 tridymite Inorganic materials 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 4
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- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- 239000007767 bonding agent Substances 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 3
- 238000000748 compression moulding Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 abstract description 11
- 238000009413 insulation Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 5
- 239000002904 solvent Substances 0.000 abstract description 4
- 229910052593 corundum Inorganic materials 0.000 description 16
- 229910001845 yogo sapphire Inorganic materials 0.000 description 16
- 238000005266 casting Methods 0.000 description 4
- 238000004321 preservation Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011325 microbead Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
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- 239000000243 solution Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
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- 230000002411 adverse Effects 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 235000019580 granularity Nutrition 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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- 238000011056 performance test Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
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Abstract
本申请公开了一种用于钢包永久层的微孔莫来石砖及其制备方法,以质量份计,所述微孔莫来石砖的原料包括:微孔莫来石:50~70份;焦宝石:0~15份;叶腊石:10~20份;漂珠:5~20份;氧化铝微粉:2~5份;黏土:3~10份;结合剂:3~10份。本申请的用于钢包永久层的微孔莫来石砖,气孔以微小气孔形态分布的微孔莫来石作为主要原料,辅以具有高温膨胀的特性的叶腊石,使微孔莫来石砖具有导热系数低,隔热性能好的优点。
Description
技术领域
本申请涉及耐火材料技术领域,特别是涉及一种用于钢包永久层的微孔莫来石砖及其制备方法。
背景技术
钢包是由外壳、内衬和注流控制机构三部分组成的。永久层作为内衬的重要组成部分,主要起到两个作用:一是保温作用;二是保险作用。故永久层耐材要求具有一定的抗机械冲击性能、一定的抵抗高温的性能,较好的保温隔热性,为钢包安全运行的最后一道屏障,起到保护钢包作用。目前国内中小型转炉钢包,大多采用铝镁浇注料整体内衬,其优点是整体性好,耐渣侵蚀性能好、使用寿命长,但是导热系数高、散热损失大,导致钢水温降较大,给生产带来不利影响且能耗较高,降低了钢包的使用寿命。
整体浇注钢包内钢水温度的变化与内衬浇注料的技术进步密切相关,内衬永久层浇注料的改进是提高整体浇注钢包保温效果的重要途径。
发明内容
为了解决现有技术存在的问题,本申请提供了一种用于钢包永久层的微孔莫来石砖,气孔以微小气孔形态分布的微孔莫来石作为主要原料,辅以具有高温膨胀的特性的叶腊石,使微孔莫来石砖具有导热系数低,隔热性能好的优点。
本申请提供一种用于钢包永久层的微孔莫来石砖,以质量份计,所述微孔莫来石砖的原料包括:
以下还提供了若干可选方式,但并不作为对上述总体方案的额外限定,仅仅是进一步的增补或优选,在没有技术或逻辑矛盾的前提下,各可选方式可单独针对上述总体方案进行组合,还可以是多个可选方式之间进行组合。
可选的,所述微孔莫来石中的Al2O3≥60.0wt%;所述微孔莫来石的体密≥1.1g/cm3;所述微孔莫来石的粒度级配为:1mm~3mm和0.3mm~1mm。
可选的,所述焦宝石中的Al2O3≥43.0wt%;所述焦宝石的粒度为:≤1mm。
可选的,所述叶腊石中的Al2O3≥20.0wt%,SiO2≤75.0wt%;所述叶腊石中的粒度级配为:1mm~2mm、0mm~1mm和≤0.088mm。
可选的,所述漂珠中的Al2O3为20.0wt%~40.0wt%;所述漂珠的粒度为:≤0.2mm。
可选的,所述增塑剂为粘土、活性氧化铝微粉、羧甲基纤维素、氧化硅微粉中的一种或多种。
可选的,所述结合剂为水玻璃、纸浆废液、磷酸盐中的一种或多种。
可选的,以质量份计,所述微孔莫来石砖的原料包括:
可选的,以质量份计,所述微孔莫来石砖的原料包括:
本申请还提供一种用于钢包永久层的微孔莫来石砖的制备方法,包括将微孔莫来石、焦宝石、叶腊石、漂珠、氧化铝微粉、增塑剂以及结合剂进行混合,出料后机压成型,在1000~1250℃条件下烧成微孔莫来石砖。
可选的,在1200℃条件下烧成微孔莫来石砖。
本申请的用于钢包永久层的微孔莫来石砖至少具有以下技术效果之一:
用于钢包永久层的微孔莫来石砖以微孔莫来石孔为主要原料,微孔莫来石孔的气孔以微小气孔的形态分布;同时,在原料中加入叶腊石,叶腊石在高温下会发生膨胀,产生微气孔和裂纹,使用于钢包永久层的微孔莫来石砖具有良好的隔热性能,能够起到一定的保护钢包的作用。
具体实施方式
下面通过实施例对本申请进行进一步阐述。
本申请一实施例提供一种用于钢包永久层的微孔莫来石砖,以质量份计,微孔莫来石砖的原料包括:微孔莫来石:50~70份;焦宝石:0~15份;叶腊石:10~20份;漂珠:5~20份;氧化铝微粉:2~5份;增塑剂:3~10份;结合剂:3~10份。
微孔莫来石砖的原料中,选用的微孔莫来石本身的耐火度较高,气孔以微小气孔的形态分布在微孔莫来石材料中,导热率低,强度高,表现出非常优异的隔热性能和一定的力学强度,可降低高温冶炼热损失和机械冲击,以及一定的钢水侵蚀和冲刷性能,同时资源丰富,便于大规模应用。
在微孔莫来石砖中加入焦宝石,原因在于,焦宝石具有较高的耐磨性能,抵抗拆包的机械冲击和磨损。
在微孔莫来石砖中加入叶腊石,原因在于,叶腊石高温膨胀,产生微气孔和裂纹增加砖的膨胀和隔热性能。
在微孔莫来石砖中加入漂珠,原因在于,漂珠原料具有体密低、热导率低及保温性能好的优点,降低了微孔莫来石砖的体积密度,提高了微孔莫来石砖的隔热保温性能。
另一实施例中,微孔莫来石中的Al2O3≥60.0wt%;微孔莫来石的体密≥1.1g/cm3;微孔莫来石的粒度级配为:1mm~3mm和0.3mm~1mm。
粒度级配中的粒度尺寸范围,仅仅是表达原料的的不同规格,并不强调混配后的组成。
在微孔莫来石砖中选用不同粒度的微孔莫来石进行搭配,目的是保证其施工性能前提下,使微孔莫来石砖具有一定强度,提高微孔莫来石砖的抗机械冲击性能。
其中,微孔莫来石的体积密度可以选择一种或两种,当选择两种不同的体积密度时,需满足:一种体密≥1.1g/cm3,另一种体密≥1.8g/cm3。
另一实施例中,焦宝石中的Al2O3≥43.0wt%;焦宝石的粒度为:≤1mm。
焦宝石可以是经回转窑或者竖窑高温烧制得到。
进一步的,焦宝石的粒度为:≤0.088mm。
另一实施例中,叶腊石中的Al2O3≥20.0wt%,SiO2≤75.0wt%;叶腊石的粒度级配为:1mm~2mm、0mm~1mm和≤0.088mm。
对叶腊石进行选择时,可以选择不同规格的叶腊石一种或者多种。
另一实施例中,漂珠中的Al2O3为20.0wt%~40.0wt%;漂珠的粒度为:≤0.2mm。
漂珠有时也叫空心微珠,与微珠的比重不同。这里的漂珠也可以选用微珠。
另一实施例中,增塑剂为粘土、活性氧化铝微粉、羧甲基纤维素、氧化硅微粉中的一种或多种。
另一实施例中,结合剂为水玻璃、纸浆废液、磷酸盐中的一种或多种。
本申请还提供一种用于钢包永久层的微孔莫来石砖的制备方法,包括将微孔莫来石、焦宝石、叶腊石、漂珠、氧化铝微粉、增塑剂以及结合剂进行混合,出料后机压成型,在1000~1250℃条件下烧成微孔莫来石砖。
在优选的实施例中,在1200℃条件下烧成微孔莫来石砖。
以下提供本申请的各实施例。
实施例1~4
用于钢包永久层的微孔莫来石砖的各原料,以质量份计(份),如表1所示。
表1
实施例1中,
微孔莫来石为Al2O3=68.0wt%,体密≥1.8g/cm3;
焦宝石为Al2O3=44.0wt%;
叶腊石为Al2O3=22.0wt%,SiO2=70.0wt%;
漂珠为Al2O3=23.0wt%。
实施例2中,
微孔莫来石为Al2O3=67.0wt%,体密≥1.8g/cm3;
焦宝石为Al2O3=45.0wt%;
叶腊石为Al2O3=25.0wt%,SiO2=65.0wt%;
漂珠为Al2O3=26.0wt%。
实施例3中,
微孔莫来石为Al2O3=64.0wt%,体密≥1.3g/cm3;
焦宝石为Al2O3=48.0wt%;
叶腊石为Al2O3=26.0wt%,SiO2=63.0wt%;
漂珠为Al2O3=30.0wt%。
实施例4中,
微孔莫来石为Al2O3=64.0wt%,体密≥1.2g/cm3。
焦宝石为Al2O3=48.0wt%;
叶腊石为Al2O3=26.0wt%,SiO2=63.0wt%;
漂珠为Al2O3=30.0wt%。
测试例
将实施例1~4用于钢包永久层的微孔莫来石砖的各原料进行混合,出料后机压成型,最后在1200℃条件下烧成用于钢包永久层的微孔莫来石砖。对实施例1~4得到的用于钢包永久层的微孔莫来石砖进行相应的性能测试,得到的测试结果如表2所示。
表2
性能指标名称 | 实施例1 | 实施例2 | 实施例3 | 实施例4 |
体积密度(g/cm<sup>3</sup>) | 1.93 | 1.9 | 1.5 | 1.4 |
气孔率(%) | 30 | 32 | 34 | 40 |
耐压强度(MPa) | 36 | 33 | 30 | 28 |
导热系数(Kcal/h·m·℃);300℃ | 0.41 | 0.36 | 0.25 | 0.20 |
由表2可以看出,各实施例得到的用于钢包永久层的微孔莫来石砖具有比较适宜的体积密度,较高的气孔率;耐压强度在28~36Mpa之间,条件为300℃下的导热系数在0.20~0.41Kcal/h·m·℃之间,具有较高的耐压强度和较低的导热率。
Claims (10)
2.根据权利要求1所述的用于钢包永久层的微孔莫来石砖,其特征在于,所述微孔莫来石中的Al2O3≥60.0wt%;所述微孔莫来石的体密≥1.1g/cm3;所述微孔莫来石的粒度级配为:1mm~3mm和0.3mm~1mm。
3.根据权利要求1所述的用于钢包永久层的微孔莫来石砖,其特征在于,所述焦宝石中的Al2O3≥43.0wt%;所述焦宝石的粒度为:≤1mm。
4.根据权利要求1所述的用于钢包永久层的微孔莫来石砖,其特征在于,所述叶腊石中的Al2O3≥20.0wt%,SiO2≤75.0wt%;所述叶腊石的粒度级配为:1mm~2mm、0mm~1mm和≤0.088mm。
5.根据权利要求1所述的用于钢包永久层的微孔莫来石砖,其特征在于,所述漂珠中的Al2O3为20.0wt%~40.0wt%;所述漂珠的粒度为:≤0.2mm。
6.根据权利要求1所述的用于钢包永久层的微孔莫来石砖,其特征在于,所述增塑剂为粘土、活性氧化铝微粉、羧甲基纤维素、氧化硅微粉中的一种或多种。
7.根据权利要求1所述的用于钢包永久层的微孔莫来石砖,其特征在于,所述结合剂为水玻璃、纸浆废液、磷酸盐中的一种或多种。
10.根据权利要求1~9所述的用于钢包永久层的微孔莫来石砖的制备方法,其特征在于,将微孔莫来石、焦宝石、叶腊石、漂珠、氧化铝微粉、增塑剂以及结合剂进行混合,出料后机压成型,在1000~1250℃条件下烧成微孔莫来石砖。
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