Raw material composition for soda-lime glass

C - Chemistry – Metallurgy – 03 – C

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261/16

C03C 1/00 (2006.01)

Patent

CA 2302247

A raw material composition for a soda-lime glass which can effectively inhibit the formation of nickel sulfide (NiS) during melting of the material. A foreign substance of nickel sulfide (NiS) which is present in a soda-lime glass is formed by the reaction, during vitrifying reaction at an elevated temperature, of Ni components contained in a metal particle containing nickel and in stainless steel used in a glass-melting furnace with sulfur (S) components contained in Na2 SO4 used as a material for glass. The inventive raw material composition for a soda-lime glass comprises a small amount of an additive comprising a metal oxide, a metal chloride, a metal sulfate or a metal nitrate. The composition can be used for reducing or completely vanishing the formation of NiS by the reaction of Ni and S during melting.

Composition de matière première pour verre sodocalcique, qui empêche efficacement la formation de sulfure de nickel (NiS) durant sa fusion. Une substance étrangère, représentée par du sulfure de nickel (NiS) présent dans un verre sodocalcique, est formée par la réaction, durant la vitrification à haute température, des composants Ni contenus dans une particule métallique contenant du nickel et dans l'acier inoxydable utilisé dans un four de fusion du verre, avec les composants soufre (S) contenus dans le Na¿2?SO¿4? utilisé comme matériau de formation du verre. La composition de matière première de l'invention, destinée à un verre sodocalcique, renferme une petite quantité d'un additif qui peut être un oxyde, un chlorure, un sulfate ou un nitrate métallique. La composition peut être utilisée pour diminuer ou supprimer totalement la formation de NiS durant la réaction du Ni et du S durant la fusion.

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