CN107698247A - 一种硅铁包用半轻质硅莫砖及其制备方法 - Google Patents

一种硅铁包用半轻质硅莫砖及其制备方法 Download PDF

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CN107698247A
CN107698247A CN201711051697.5A CN201711051697A CN107698247A CN 107698247 A CN107698247 A CN 107698247A CN 201711051697 A CN201711051697 A CN 201711051697A CN 107698247 A CN107698247 A CN 107698247A
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闫承华
闫祖宁
曹宏光
闫业玉
刘丽君
李海君
闫祖渊
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Xiaoyi Hezhongxing Mineral Product Co Ltd http //wwwzghydycom/mla/63005html
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Abstract

本发明属于耐火材料技术领域，特别涉及一种硅铁包用半轻质硅莫砖及其制备方法。主要解决现有硅铁包用高铝砖存在的导热系数较高、保温性能差的技术问题。本发明的技术方案是：一种硅铁包用半轻质硅莫砖，其由下述重量份的原料配制而成：高铝矾土熟料60～80份、高铝矾土生料2～5份、红柱石细粉3～8份、碳化硅细粉4～7份、苏州土2～6份、氧化铝空心球3～10份、硅微粉1～3份、硅溶胶3.5～6份。一种硅铁包用半轻质硅莫砖的制备方法，包括以下步骤：1)研磨、破碎；2)原料混碾；3)成型制坯；4)干燥；5)高温烧制；6)冷却、成品。本发明具有成本低、抗热震稳定性能优异、导热系数低、热效率高等优点。

Description

一种硅铁包用半轻质硅莫砖及其制备方法
技术领域
本发明属于耐火材料技术领域，特别涉及一种硅铁包用半轻质硅莫砖及其制备方法。
背景技术
随着我国铁合金产业的迅猛发展，用于铁合金生产的矿热炉近年来在大型化、智能化等方面取得长足进步。而硅铁合金出铁所用的硅铁包工作层材料普遍使用高铝砖，其抵抗酸性渣和液态铁合金侵蚀能力一般；导热系数较高、保温性能差，因而会造成硅铁包运行过程中热量损失较大；抗热震稳定性能不足，导致使用过程中异常损毁较重。在硅铁包工作层材料方面存在巨大的提升空间。
发明内容
本发明的目的在于克服现有技术的缺点，提供一种硅铁包用半轻质硅莫砖及其制备方法，解决现有硅铁包用高铝砖存在的导热系数较高、保温性能差的技术问题。
本发明是通过以下技术方案实现的：
一种硅铁包用半轻质硅莫砖，其由下述重量份的原料配制而成：高铝矾土熟料60～80份、高铝矾土生料2～5份、红柱石细粉3～8份、碳化硅细粉4～7份、苏州土2～6份、氧化铝空心球3～10份、硅微粉1～3份、硅溶胶3.5～6份。
进一步，所述氧化铝空心球中Al2O3的含量≥99.0％、Fe2O3的含量≤0.15％、SiO2的含量≤0.2％；氧化铝空心球颗粒的堆积密度0.5-1g/cm3、粒度范围0.1-0.5mm；所述硅微粉中SiO2的含量≥97％，粒度≤1μm；所述硅微粉中的微粒状态为高活性无定形态。
一种硅铁包用半轻质硅莫砖的制备方法，包括以下步骤：
1)研磨、破碎：将重量份为60～80份的高铝矾土熟料的40％、重量份为2～5份的高铝矾土生料加入研磨机中研磨至粒度小于0.088mm，研磨完成后制得粉料；将重量份为60～80份的高铝矾土熟料的60％破碎至粒径为1～3mm，制得骨料颗粒；
2)原料混碾：将步骤1)中的骨料颗粒加入混碾机中进行干混2～3min后，将3.5～6份的硅溶胶加入混碾机中进行湿混5min，然后加入步骤1)中制得的粉料、重量份为3～8份的红柱石细粉、重量份为4～7份的碳化硅细粉、重量份为2～6份的苏州土、重量份为3～10份的氧化铝空心球和重量份为1～3份的硅微粉，湿混15～20min后出料，制得混料；
3)成型制坯：将步骤2)中的混料加入摩擦压力机中，在100Mpa的压力下制得砖坯；
4)干燥：将步骤3)中制得的砖坯放入50～70℃的干燥炉中干燥24～48h,干燥后砖坯的水分含量≤1％；
5)高温烧制：干燥完成后将其放入1200～1250℃的窑炉中烧制3～5小时，然后转至1400～1430℃的窑炉中烧制5～8h；
6)冷却、成品：烧制后炉冷至室温即可制得硅铁包用半轻质硅莫砖成品。
进一步，所述氧化铝空心球中Al2O3的含量≥99.0％、Fe2O3的含量≤0.15％、SiO2的含量≤0.2％；氧化铝空心球颗粒的堆积密度0.5-1g/cm3、粒度范围0.1-0.5mm；所述硅微粉中SiO2的含量≥97％，粒度≤1μm；所述硅微粉中的微粒状态为高活性无定形态。
本发明所采用的苏州土为软质黏土，其具有良好的可塑性、结合性，可在本发明中提供良好的结合性能和低温烧结性能，促进低温、中温时莫来石的转化进程；本发明的抗酸性熔融金属或合金液的侵蚀性能强、抗热震稳定性能优异、导热系数低、热效率高，而且材料成本较低。与现有硅铁包用高铝砖相比，成本略有降低、节能20％以上，使用寿命提高50％以上。
因此，与背景技术相比，本发明的次晶相为碳化硅、少量石英、少量高硅氧玻璃相，微孔结构合理、分布均匀，具有成本低、抗酸性熔融金属或合金液的侵蚀性能强、抗热震稳定性能优异、导热系数低、热效率高等优点。
具体实施方式
下面将结合实施例对本发明的技术方案进行清楚、完整地描述。
实施例1
本实施例中的一种硅铁包用半轻质硅莫砖，其由下述重量份的原料配制而成：高铝矾土熟料60份、高铝矾土生料2份、红柱石细粉3份、碳化硅细粉4份、苏州土2份、氧化铝空心球3份、硅微粉1份、硅溶胶3.5份。
一种硅铁包用半轻质硅莫砖的制备方法，包括以下步骤：
1)研磨、破碎：将重量份为60份的高铝矾土熟料的40％、重量份为2份的高铝矾土生料加入研磨机中研磨至粒度小于0.088mm，研磨完成后制得粉料；将重量份为60份的高铝矾土熟料的60％破碎至粒径为1～3mm，制得骨料颗粒；
2)原料混碾：将步骤1)中的骨料颗粒加入混碾机中进行干混2～3min后，将3.5份的硅溶胶加入混碾机中进行湿混5min，然后加入步骤1)中制得的粉料、重量份为3份的红柱石细粉、重量份为4份的碳化硅细粉、重量份为2份的苏州土、重量份为3份的氧化铝空心球和重量份为1份的硅微粉，湿混15～20min后出料，制得混料；
3)成型制坯：将步骤2)中的混料加入摩擦压力机中，在100Mpa的压力下制得砖坯；
4)干燥：将步骤3)中制得的砖坯放入50～70℃的干燥炉中干燥24～48h,干燥后砖坯的水分含量≤1％；
5)高温烧制：干燥完成后将其放入1200～1250℃的窑炉中烧制3～5小时，然后转至1400～1430℃的窑炉中烧制5～8h；
6)冷却、成品：烧制后炉冷至室温即可制得硅铁包用半轻质硅莫砖成品。
所述氧化铝空心球中Al2O3的含量≥99.0％、Fe2O3的含量≤0.15％、SiO2的含量≤0.2％；氧化铝空心球颗粒的堆积密度0.5-1g/cm3、粒度范围0.1-0.5mm；所述硅微粉中SiO2的含量≥97％，粒度≤1μm；所述硅微粉中的微粒状态为高活性无定形态。
实施例2
本实施例中的一种硅铁包用半轻质硅莫砖，其由下述重量份的原料配制而成：高铝矾土熟料80份、高铝矾土生料5份、红柱石细粉8份、碳化硅细粉7份、苏州土6份、氧化铝空心球10份、硅微粉3份、硅溶胶6份。
一种硅铁包用半轻质硅莫砖的制备方法，包括以下步骤：
1)研磨、破碎：将重量份为80份的高铝矾土熟料的40％、重量份为5份的高铝矾土生料加入研磨机中研磨至粒度小于0.088mm，研磨完成后制得粉料；将重量份为80份的高铝矾土熟料的60％破碎至粒径为1～3mm，制得骨料颗粒；
2)原料混碾：将步骤1)中的骨料颗粒加入混碾机中进行干混2～3min后，将6份的硅溶胶加入混碾机中进行湿混5min，然后加入步骤1)中制得的粉料、重量份为8份的红柱石细粉、重量份为7份的碳化硅细粉、重量份为6份的苏州土、重量份为10份的氧化铝空心球和重量份为3份的硅微粉，湿混15～20min后出料，制得混料；
3)成型制坯：将步骤2)中的混料加入摩擦压力机中，在100Mpa的压力下制得砖坯；
4)干燥：将步骤3)中制得的砖坯放入50～70℃的干燥炉中干燥24～48h,干燥后砖坯的水分含量≤1％；
5)高温烧制：干燥完成后将其放入1200～1250℃的窑炉中烧制3～5小时，然后转至1400～1430℃的窑炉中烧制5～8h；
6)冷却、成品：烧制后炉冷至室温即可制得硅铁包用半轻质硅莫砖成品。
所述氧化铝空心球中Al2O3的含量≥99.0％、Fe2O3的含量≤0.15％、SiO2的含量≤0.2％；氧化铝空心球颗粒的堆积密度0.5-1g/cm3、粒度范围0.1-0.5mm；所述硅微粉中SiO2的含量≥97％，粒度≤1μm；所述硅微粉中的微粒状态为高活性无定形态。
实施例3
本实施例中的一种硅铁包用半轻质硅莫砖，其由下述重量份的原料配制而成：高铝矾土熟料70份、高铝矾土生料4份、红柱石细粉5份、碳化硅细粉6份、苏州土5份、氧化铝空心球7份、硅微粉2份、硅溶胶5份。
一种硅铁包用半轻质硅莫砖的制备方法，包括以下步骤：
1)研磨、破碎：将重量份为70份的高铝矾土熟料的40％、重量份为4份的高铝矾土生料加入研磨机中研磨至粒度小于0.088mm，研磨完成后制得粉料；将重量份为70份的高铝矾土熟料的60％破碎至粒径为1～3mm，制得骨料颗粒；
2)原料混碾：将步骤1)中的骨料颗粒加入混碾机中进行干混2～3min后，将5份的硅溶胶加入混碾机中进行湿混5min，然后加入步骤1)中制得的粉料、重量份为5份的红柱石细粉、重量份为6份的碳化硅细粉、重量份为5份的苏州土、重量份为7份的氧化铝空心球和重量份为2份的硅微粉，湿混15～20min后出料，制得混料；
3)成型制坯：将步骤2)中的混料加入摩擦压力机中，在100Mpa的压力下制得砖坯；
4)干燥：将步骤3)中制得的砖坯放入50～70℃的干燥炉中干燥24～48h,干燥后砖坯的水分含量≤1％；
5)高温烧制：干燥完成后将其放入1200～1250℃的窑炉中烧制3～5小时，然后转至1400～1430℃的窑炉中烧制5～8h；
6)冷却、成品：烧制后炉冷至室温即可制得硅铁包用半轻质硅莫砖成品。
所述氧化铝空心球中Al2O3的含量≥99.0％、Fe2O3的含量≤0.15％、SiO2的含量≤0.2％；氧化铝空心球颗粒的堆积密度0.5-1g/cm3、粒度范围0.1-0.5mm；所述硅微粉中SiO2的含量≥97％，粒度≤1μm；所述硅微粉中的微粒状态为高活性无定形态。
本发明能够以多种形式具体实施而不脱离发明的精神或实质，所以应当理解，上述实施例不限于前述的细节，而应在权利要求所限定范围内广泛地解释，因此落入权利要求或其等效范围内的变化和改型都应为权利要求所涵盖。

Claims (4)

1.一种硅铁包用半轻质硅莫砖，其特征在于：其由下述重量份的原料配制而成：高铝矾土熟料60～80份、高铝矾土生料2～5份、红柱石细粉3～8份、碳化硅细粉4～7份、苏州土2～6份、氧化铝空心球3～10份、硅微粉1～3份、硅溶胶3.5～6份。
2.根据权利要求1所述的硅铁包用半轻质硅莫砖，其特征在于：所述氧化铝空心球中Al2O3的含量≥99.0％、Fe2O3的含量≤0.15％、SiO2的含量≤0.2％；氧化铝空心球颗粒的堆积密度0.5-1g/cm3、粒度范围0.1-0.5mm；所述硅微粉中SiO2的含量≥97％，粒度≤1μm；所述硅微粉中的微粒状态为高活性无定形态。
3.一种如根据权利要求1所述的硅铁包用半轻质硅莫砖的制备方法，其特征在于：包括以下步骤：
1)研磨、破碎：将重量份为60～80份的高铝矾土熟料的40％、重量份为2～5份的高铝矾土生料加入研磨机中研磨至粒度小于0.088mm，研磨完成后制得粉料；将重量份为60～80份的高铝矾土熟料的60％破碎至粒径为1～3mm，制得骨料颗粒；
2)原料混碾：将步骤1)中的骨料颗粒加入混碾机中进行干混2～3min后，将3.5～6份的硅溶胶加入混碾机中进行湿混5min，然后加入步骤1)中制得的粉料、重量份为3～8份的红柱石细粉、重量份为4～7份的碳化硅细粉、重量份为2～6份的苏州土、重量份为3～10份的氧化铝空心球和重量份为1～3份的硅微粉，湿混15～20min后出料，制得混料；
3)成型制坯：将步骤2)中的混料加入摩擦压力机中，在100Mpa的压力下制得砖坯；
4)干燥：将步骤3)中制得的砖坯放入50～70℃的干燥炉中干燥24～48h,干燥后砖坯的水分含量≤1％；
5)高温烧制：干燥完成后将其放入1200～1250℃的窑炉中烧制3～5小时，然后转至1400～1430℃的窑炉中烧制5～8h；
6)冷却、成品：烧制后炉冷至室温即可制得硅铁包用半轻质硅莫砖成品。
4.根据权利要求3所述的硅铁包用半轻质硅莫砖的制备方法，其特征在于：所述氧化铝空心球中Al2O3的含量≥99.0％、Fe2O3的含量≤0.15％、SiO2的含量≤0.2％；氧化铝空心球颗粒的堆积密度0.5-1g/cm3、粒度范围0.1-0.5mm；所述硅微粉中SiO2的含量≥97％，粒度≤1μm；所述硅微粉中的微粒状态为高活性无定形态。
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