Patent ID: 8122936
Filing Date: 2012-02-28
Classification: B22C

Abstract:
1. An anti-veining additive composition for sand cores used in metal casting, said composition comprising: (a) from about 20 to about 70% by weight iron(III) oxide; (b) from about 20 to about 70% by weight iron(II,III) oxide; and (c) from about 10 to about 60% by weight of a glass that is substantially free of lithium oxide; wherein said iron (III) oxide, iron, (II,III) oxide, and glass are blended toether in intimate admixture; wherein said iron(III) oxide and said iron(II,III) oxide are each comprised predominately of particles having a particle size less than about 75 microns; and wherein said anti-veining additive is substantually free of lithium-bearing minerals.