| 摘要 |
<p>Shaped beads formed from a zeolite and a clay binder by tumbling granulation is problematic in that the strength and abrasion resistance are poor. Shaped zeolite beads with an average diameter of 1.0 to 3.0 and having a compressive strength of 35 N or greater (particularly 70 N or greater) when hydrated and an abrasion resistance factor of 1.5% or less are obtained by subjecting a composition of at least 35 parts by weight of water per 100 parts by weight of zeolite and clay binder combined to tumbling granulation and then adding 4 parts by weight or less of clay binder per 100 parts by weight of the molding (excluding the water content), subjecting the product to tumbling granulation, drying and baking. Preferably the zeolite crystals used are 5 µm or smaller; between 10 and 50 parts by weight of clay binder are used; and the same type of clay binder is used for molding and grading.</p> |
