CN111908899A - 一种节能型耐腐蚀镁铝质耐火材料 - Google Patents

一种节能型耐腐蚀镁铝质耐火材料 Download PDF

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CN111908899A
CN111908899A CN201910384418.XA CN201910384418A CN111908899A CN 111908899 A CN111908899 A CN 111908899A CN 201910384418 A CN201910384418 A CN 201910384418A CN 111908899 A CN111908899 A CN 111908899A
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magnesia
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陈建平
许立功
曹伯军
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Changzhou Jinchang Refractories Co ltd
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Abstract

本发明涉及一种节能型耐腐蚀镁铝质耐火材料，主要由以质量份数计的以下成分组成：高纯镁砂35‑45份、镁铝尖晶石30‑40份、超细氧化钙微粉2‑4份、氧化石墨烯粉0.1‑0.4份、辅助添加剂3‑7份、结合剂1‑3份；所述高纯镁砂由不同粒度的镁砂混合而成，所述镁铝尖晶石也由不同粒度的镁铝尖晶石原料混合而成，所述辅助添加剂可以是氮化硼、二氧化硅中的一种或两种的混合物。本发明的耐火材料具有保温效果好、制备工艺能耗低、高温性能好的优点。

Description

一种节能型耐腐蚀镁铝质耐火材料
技术领域
本发明涉及RH炉用耐材制备技术领域，尤其涉及一种节能型耐腐蚀镁铝质耐火材料。
背景技术
随着能源的日益紧张，我国对高温工业用节能型耐材的研制和生产日益重视。目前，主要从钢包的保温设计、烘烤效果、包衬蓄热、包壁热传导、保内上方渣层散热行为等方向研究高温炉窑的节能技术，对于钢包的保温设计，一方面是钢包加盖等结构化设计、另一方面就是钢包内衬耐材的配方设计。钢包结构的优化必将造成钢包生产工艺和生产成本的增加，因此耐材的配方设计更符合工业化应用的趋势。
发明内容
为了解决上述技术问题，提供一种能够增加耐火材料的保温性能、同时不损害其耐腐蚀性能的技术方案，本发明提供以下技术方案：
一种节能型耐腐蚀镁铝质耐火材料，由以质量份数计的以下成分组成：高纯镁砂35-45份、镁铝尖晶石30-40份、超细氧化钙微粉2-4份、氧化石墨烯粉0.1-0.4份、辅助添加剂3-7份、结合剂1-3份。
本发明采用镁砂与镁铝尖晶石的混合物的主要原料，相对单纯使用镁砂保温性更佳、相比单纯使用镁铝尖晶石成本低。同时，本配方中添加了微量的氧化石墨烯粉，在提高耐材耐磨性与抗渣侵性的同时还能够进一步提高其保温隔热性能。
进一步的，所述高纯镁砂包括电熔镁砂粗颗粒(5-8mm)40％、电熔镁砂细颗粒(3-5mm)40％、电熔镁砂微粉(1-3mm)20％。采用粒度不同的电熔镁砂颗粒混合主要是为了降低生产成本，并且能够提供混料过程中的分散性能、使得结构更加致密均匀。
进一步的，所述镁铝尖晶石包括镁铝尖晶石细颗粒(0.3-0.8mm)45％、镁铝尖晶石细粉(0.01-0.3mm)35％、镁铝尖晶石微粉(0.01-1μm)20％。本发明材采用不同粒度的镁铝尖晶石原料同样也是为了降低生产成本、与提高分散性能。
进一步的，所述辅助添加剂为是氮化硼、二氧化硅中的一种或两种的混合物，添加辅助添加剂能够提高产品的抗磨蚀能力与抗热震稳定性。
进一步的，所述结合剂为酚醛树脂。
本发明的有益效果在于：通过改良RH炉内衬砖的配方并微调生产工艺，能够大大提高耐材的保温隔热性能、并且不损害耐材的其他高温性能，对于高温工业具有十分重要的意义、因而具备广泛的市场应用前景。
具体实施方式
实施例1、
一种节能型耐腐蚀镁铝质耐火材料，由以质量份数计的以下成分组成：高纯镁砂40份、镁铝尖晶石35份、超细氧化钙微粉3份、氧化石墨烯粉0.25份、氮化硼5份、酚醛树脂2份。
所述高纯镁砂包括电熔镁砂粗颗粒(5-8mm)40％、电熔镁砂细颗粒(3-5mm)40％、电熔镁砂微粉(1-3mm)20％。
所述镁铝尖晶石包括镁铝尖晶石细颗粒(0.3-0.8mm)45％、镁铝尖晶石细粉(0.01-0.3mm)35％、镁铝尖晶石微粉(0.01-1μm)20％。
本实施例的耐火材料的制备工艺包括以下步骤：
步骤1、按照比例将高纯镁砂原料与镁铝尖晶石原料分别混合均匀；
步骤2、将镁铝尖晶石原料先投入混炼设备、混炼速度为30-50r/min、混炼时间为10-15min；
步骤3、将高纯镁砂原料也投入混炼设备、继续混炼，混炼速度为40-60r/min、混炼时间为20-30min；
步骤4、将氧化石墨烯粉少量多次添加至混炼设备中，加快混炼速度；
步骤5、将超细氧化钙微粉、氮化硼、酚醛树脂依次添加至混炼设备中；
步骤6、以300-700MPa的压力在压砖机上压制成砖坯；
步骤7、投入隧道窑进行干燥。
实施例2、
一种节能型耐腐蚀镁铝质耐火材料，由以质量份数计的以下成分组成：高纯镁砂35份、镁铝尖晶石30份、超细氧化钙微粉2份、氧化石墨烯粉0.1份、氮化硼3份、酚醛树脂1份。
所述高纯镁砂包括电熔镁砂粗颗粒(5-8mm)40％、电熔镁砂细颗粒(3-5mm)40％、电熔镁砂微粉(1-3mm)20％。
所述镁铝尖晶石包括镁铝尖晶石细颗粒(0.3-0.8mm)45％、镁铝尖晶石细粉(0.01-0.3mm)35％、镁铝尖晶石微粉(0.01-1μm)20％。
本实施例的制备工艺与实施例1相同。
实施例3、
一种节能型耐腐蚀镁铝质耐火材料，由以质量份数计的以下成分组成：高纯镁砂45份、镁铝尖晶石40份、超细氧化钙微粉4份、氧化石墨烯粉0.4份、大氮化硼7份、酚醛树脂3份。
所述高纯镁砂包括电熔镁砂粗颗粒(5-8mm)40％、电熔镁砂细颗粒(3-5mm)40％、电熔镁砂微粉(1-3mm)20％。
所述镁铝尖晶石包括镁铝尖晶石细颗粒(0.3-0.8mm)45％、镁铝尖晶石细粉(0.01-0.3mm)35％、镁铝尖晶石微粉(0.01-1μm)20％。
本实施例的制备工艺与实施例1相同。

Claims (5)

1.一种节能型耐腐蚀镁铝质耐火材料，其特征在于，由以质量份数计的以下成分组成：高纯镁砂35-45份、镁铝尖晶石30-40份、超细氧化钙微粉2-4份、氧化石墨烯粉0.1-0.4份、辅助添加剂3-7份、结合剂1-3份。
2.如权利要求1所述的一种节能型耐腐蚀镁铝质耐火材料，其特征在于：所述高纯镁砂包括电熔镁砂粗颗粒(5-8mm)40％、电熔镁砂细颗粒(3-5mm)40％、电熔镁砂微粉(1-3mm)20％。
3.如权利要求1所述的一种节能型耐腐蚀镁铝质耐火材料，其特征在于：所述镁铝尖晶石包括镁铝尖晶石细颗粒(0.3-0.8mm)45％、镁铝尖晶石细粉(0.01-0.3mm)35％、镁铝尖晶石微粉(0.01-1μm)20％。
4.如权利要求1所述的一种节能型耐腐蚀镁铝质耐火材料，其特征在于：所述辅助添加剂为是氮化硼、二氧化硅中的一种或两种的混合物。
5.如权利要求1所述的一种节能型耐腐蚀镁铝质耐火材料，其特征在于：所述结合剂为酚醛树脂。
CN201910384418.XA 2019-05-09 2019-05-09 一种节能型耐腐蚀镁铝质耐火材料 Pending CN111908899A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116217211A (zh) * 2023-01-05 2023-06-06 濮阳濮耐高温材料（集团）股份有限公司 一种添加红柱石的铝碳化硅碳砖及其制备方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116217211A (zh) * 2023-01-05 2023-06-06 濮阳濮耐高温材料（集团）股份有限公司 一种添加红柱石的铝碳化硅碳砖及其制备方法
CN116217211B (zh) * 2023-01-05 2024-01-02 濮阳濮耐高温材料（集团）股份有限公司 一种添加红柱石的铝碳化硅碳砖及其制备方法

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