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Aluminum oxide-lanthanum hexaaluminate special heat-insulating refractory material as well as preparation method and application thereof
The invention discloses an aluminum oxide-lanthanum hexaaluminate special heat-insulating refractory material as well as a preparation method and application thereof, and relates to the field of heat-insulating refractory materials for high-temperature kiln linings. The preparation method comprises the following steps: taking tabular corundum fine powder, activated aluminum oxide micro powder, lanthanum oxide micro powder and lanthanum aluminate micro powder with proper granularity as raw materials, selecting hydratable aluminum oxide as a binding agent, adding water, and stirring to obtain slurry; micron-sized spherical foam prepared from an animal protein foaming agent is used as a pore-forming template to be added into the slurry, and the material can be obtained through stirring, casting molding, curing, demolding, drying and high-temperature sintering. Compared with an existing porous heat insulation material, the aluminum oxide-lanthanum hexaaluminate special heat insulation refractory material prepared through the method has the advantages of being high in strength and low in heat conductivity coefficient, can be directly used as a working lining of a high-temperature kiln, has the obvious integrated advantage of the structure and the heat preservation function, and is high in refractoriness under load and low in reburning shrinkage rate; the service temperature is up to 1800 DEG C, and compared with the existing alumina porous material, the service life can be prolonged by 3-5 times.
氧化铝‑六铝酸镧特种隔热耐火材料及其制备方法和应用，涉及高温窑炉内衬用隔热耐火材料领域。本发明以合适粒度的板状刚玉细粉、活性氧化铝微粉、氧化镧微粉及铝酸镧微粉为原料，选用可水合氧化铝作为结合剂，加水搅拌获得料浆；利用动物蛋白发泡剂制备的微米级球形泡沫作为成孔模板加入料浆，经搅拌、浇注成型、养护、脱模、干燥并高温烧结即可得到。与现有的多孔隔热材料相比，本发明制备得到的氧化铝‑六铝酸镧特种隔热耐火材料兼顾高强度和低导热系数的优势，可直接作为高温窑炉的工作内衬使用，结构和保温功能一体化优势明显，其荷重软化温度高和重烧收缩率低，使用温度高达1800℃，与现有的氧化铝质多孔材料相比，使用寿命提高可3‑5倍。
Aluminum oxide-lanthanum hexaaluminate special heat-insulating refractory material as well as preparation method and application thereof
The invention discloses an aluminum oxide-lanthanum hexaaluminate special heat-insulating refractory material as well as a preparation method and application thereof, and relates to the field of heat-insulating refractory materials for high-temperature kiln linings. The preparation method comprises the following steps: taking tabular corundum fine powder, activated aluminum oxide micro powder, lanthanum oxide micro powder and lanthanum aluminate micro powder with proper granularity as raw materials, selecting hydratable aluminum oxide as a binding agent, adding water, and stirring to obtain slurry; micron-sized spherical foam prepared from an animal protein foaming agent is used as a pore-forming template to be added into the slurry, and the material can be obtained through stirring, casting molding, curing, demolding, drying and high-temperature sintering. Compared with an existing porous heat insulation material, the aluminum oxide-lanthanum hexaaluminate special heat insulation refractory material prepared through the method has the advantages of being high in strength and low in heat conductivity coefficient, can be directly used as a working lining of a high-temperature kiln, has the obvious integrated advantage of the structure and the heat preservation function, and is high in refractoriness under load and low in reburning shrinkage rate; the service temperature is up to 1800 DEG C, and compared with the existing alumina porous material, the service life can be prolonged by 3-5 times.
氧化铝‑六铝酸镧特种隔热耐火材料及其制备方法和应用，涉及高温窑炉内衬用隔热耐火材料领域。本发明以合适粒度的板状刚玉细粉、活性氧化铝微粉、氧化镧微粉及铝酸镧微粉为原料，选用可水合氧化铝作为结合剂，加水搅拌获得料浆；利用动物蛋白发泡剂制备的微米级球形泡沫作为成孔模板加入料浆，经搅拌、浇注成型、养护、脱模、干燥并高温烧结即可得到。与现有的多孔隔热材料相比，本发明制备得到的氧化铝‑六铝酸镧特种隔热耐火材料兼顾高强度和低导热系数的优势，可直接作为高温窑炉的工作内衬使用，结构和保温功能一体化优势明显，其荷重软化温度高和重烧收缩率低，使用温度高达1800℃，与现有的氧化铝质多孔材料相比，使用寿命提高可3‑5倍。
Aluminum oxide-lanthanum hexaaluminate special heat-insulating refractory material as well as preparation method and application thereof
氧化铝-六铝酸镧特种隔热耐火材料及其制备方法和应用
XIONG XIN (author) / LI GUIFANG (author) / WU ZHI (author) / JIANG PENGCHENG (author) / ZHANG YAZHI (author) / LI YUE (author) / YAN LIN (author) / ZHANG XIAOJING (author) / SHAN XINGJIAN (author) / ZHOU YUQI (author)
2024-07-16
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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