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Preparation and Processing Properties of nozzle Plate for Aluminum Continuous Strip Casting

China's Refractories 2016年第2期25卷 43-47页

作者： WANG Ziqiang WANG Dongdong YANG Min WANG Gang YU Lingyan ZHOU Huijun Sinosteel Luoyang Institute of Refractories Research Co.Ltd. Luoyang Yugang Longquan High Accuracy Aluminum Strip Co. Ltd.

The currently used ceramic nozzles for aluminum deep processing continuous hot rolled strips are featured with good integrity, high strength, good processing prop- erty, but non-uniform structure caused by the migration of silica sol. In this work, nozzle materials were prepared with aluminum silicate ceramic fiber, kaolin, and alumi- num tripolyphosphate as starting materials, silica sol or silica sol -epoxy resin as the binder. After pulping, cast- ing, curing at different temperatures and hot treatment, the prepared materials were analyzed in terms of migra- tion layer thickness, cold modulus of rupture, and micro- structure morphology. The results show that （1） with the same curing temperature, the migration layer thickness of specimens bonded by different binders all decreases with the curing time prolonging; with the same curing time, the migration thickness declines first and climbs then as the curing temperature increases; overall, the specimen cured at 40 ~C for 120 min has the thinnest migration layer; from the comparison, it is found that the silica sol -epoxy resin bonded specimen has slightly thinner mi- gration layer than the specimen bonded by silica sol only; （2） the specimen bonded by silica sol and epoxy resin has thinner migration layer, lower cold modulus of rupture and obvious lower bulk density than the silica sol bonded specimen; （3）the material introduced with epoxy resin has better processing property but slightly lower strength than the material bonded by silica sol.

关键词： silica sol epoxy resin alumina ceramicfiber monolithic nozzle migration layer thickness

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