氧化铝成型研究的进展

发布时间：2018-01-29 10:02

本文关键词： 氧化铝成型方法水柱成型　出处：《无机盐工业》2017年07期 　论文类型：期刊论文

【摘要】：氧化铝有α、γ、δ、η、θ、ρ、κ、χ-氧化铝等8种晶型,其中γ-氧化铝被广泛用作吸附剂、催化剂及载体。氧化铝的成型方法有转动成型法、挤出成型法、喷雾干燥成型法、油-氨柱成型法、热油柱成型法、水柱成型法等。转动成型法的优点是设备投资少,处理量大;缺点是颗粒的强度低,粒径大,粉尘多。挤出成型法的特点是操作简便,费用较低,使用广泛。喷雾干燥成型法的优点是能够制备粒径较小的球形氧化铝;缺点是耗电量大,粉尘多。油-氨柱成型法的优势是产品孔容大、强度高,缺陷是存在氨气的污染。热油柱成型法的优点是氨气污染小,产品强度较高;缺陷是热量消耗大。水柱成型法制备的氧化铝小球大小一致,且生产过程绿色环保,是一种具有前景的氧化铝成型方法。在生产过程中,成型方法需要根据颗粒的形状、大小及工业生产所用反应器的要求来确定。
[Abstract]:There are 8 crystal forms of alumina, such as 伪, 纬, 未, 畏, 胃, 蟻, 魏, 蠂 -alumina, among which 纬 -alumina is widely used as adsorbent, catalyst and carrier. Extrusion molding, spray drying molding, oil-ammonia column molding, hot oil column forming, water column forming, etc. The advantages of the extrusion molding method are simple operation, low cost and wide use. The advantage of spray drying molding is that it can produce spherical alumina with small particle size. The advantages of oil-ammonia column molding are large pore volume and high strength, and the defect is the pollution of ammonia gas. The advantages of hot oil column molding method are low ammonia pollution and high product strength. The defect is that the heat consumption is large, the size of alumina pellets prepared by water column molding method is the same, and the production process is green and environmental protection, it is a promising alumina molding method. The forming method should be determined according to the shape and size of the particles and the requirements of the reactors used in industrial production.
【作者单位】：中海油天津化工研究设计院有限公司;
【分类号】：TQ133.1
【正文快照】： 氧化铝是氢氧化铝脱水后形成的产物,是一种两性化合物,在自然界里常存在于铝土矿中。氢氧化铝包含α-三水铝石、β1-三水铝石、β2-三水铝石、α-一水软铝石和β-一水硬铝石等存在形式,它们经过加热会分解形成8种氧化铝晶体,分别为α、γ、δ、η、θ、ρ、κ、χ-Al2O3。其中

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