Process of making glass to be transformed into continuous...

C - Chemistry – Metallurgy – 03 – B

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C03B 5/225 (2006.01) C03B 37/01 (2006.01) C03C 1/00 (2006.01) C03C 13/00 (2006.01)

Patent

CA 2025482

L'invention a pour objet un procédé permettant de régler le degré d'oxydo-réduction d'un verre lors de son élaboration. Selon l'invention, qui vise les verres destinés à être transformés en fibres continues ou discontinues contenant au plus environ 1 % en poids de Fe2O3, le degré d'oxydation du verre est obtenu en incorporant dans le mélange de produits vitrifiables au moins deux oxydants, l'un d'entre eux étant un nitrate inorganique, l'autre étant au choix un composé oxygéné du manganèse dans lequel l'état d'oxydation du manganèse est supérieur à 2, le bichromate de potassium et/ou l'oxyde cérique. L'invention favorise notamment le recyclage de déchets de produits à base de fibres de verre dans le mélange vitrifiable.

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