Making porous mineral fibers

C - Chemistry – Metallurgy – 03 – B

Patent

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Details

C03B 5/193 (2006.01) B01F 15/06 (2006.01) C03B 3/00 (2006.01) C03B 5/027 (2006.01) C03B 5/187 (2006.01) C03B 37/04 (2006.01) C03B 37/075 (2006.01) C03B 37/08 (2006.01) C03B 37/10 (2006.01) B01F 7/00 (2006.01)

Patent

CA 2188578

The mineral fiber forming apparatus (10) having electrodes (14) for heating heat softenable mineral material to form a molten mineral mass is disclosed. Organically-coated glass fiber scrap and cullet are supplied to a vessel (12) providing the heat softenable mineral material. An impeller (16) turbulently mixes the molten mineral mass dispersing batch into the molten mineral mass and converting water in the molten mineral bath to steam. Molten mineral material formed by the appartus (10) includes small seeds and gaseous occlusions. The molten mineral material is fed from an outlet port (24) in the vessel (12) to a rotary spinner (30) which forms hollow mineral fibers (32) having gaseous occlusions of between 1 % and 10 % by volume by centrifuging the molten mineral material.

Cette invention concerne un appareil (10) formant des fibres minérales, qui est équipé de deux électrodes (14) prévues pour chauffer de la matière minérale se ramollisant à la chaleur afin de former une masse minérale fondue. On envoie dans une cuve (12) du calcium et des fragments de fibres de verre recouverts de matière organique constituant la matière minérale se ramollissant à la chaleur. Une roue agitatrice (16) mélange en un mouvement turbulent la masse minérale fondue et y disperse la fritte tout en transformant en vapeur l'eau contenue dans la masse minérale fondue. La matière minérale fondue formée par l'appareil (10) comprend de petits germes cristallins et des petites occlusions gazeuses. Cette matière minérale fondue sort de la cuve (12) par un orifice de sortie (24) pour pénétrer dans un panier centrifugeur rotatif (30) qui forme des fibres minérales creuses (32) présentant des occulusions gazeuses de l'ordre de 1 % à 10 % en volume, en centrifugeant ladite matière minérale fondue.

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