Fiberizable glass composition and preparation method

Abstract

The embodiments of the invention provide a fiberizable glass composition prepared from an ingredient composition. The ingredient composition comprises, but not limited to inorganic crystalline minerals, inorganic vitreous minerals, inorganic chemicals and the like.

Description

Field of invention: [0001] The present invention relates to glass compositions, and in particular to glass compositions for forming fibers. Background of the invention: [0002] Large-scale commercial production of continuous glass fibers involves melting batches consisting primarily of crystalline or non-crystalline minerals, followed by cooling and spinning. The part of energy cost for heating and spinning process accounts for the main part of the production cost, and most of this part of energy consumption is just to maintain high temperature, and the energy is eventually lost and wasted. [0003] The composition of medium-alkali glass (C glass) defined by the Chinese building materials standard JC 935-2004 is: 66.5%-67.5% SiO 2 , 5.8-6.6wt% Al 2 o 3 , 9.2-9.8wt% CaO, 3.9-4.5wt% MgO, 11.6-12.4wt% R 2 O, where K 2 O≦0.4wt%, no more than 0.4wt% Fe2O3; C glass has acid resistance, but poor alkali resistance, because it contains alkali (R 2 O) is high, and alkali metal ...

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Problems solved by technology

The energy cost for heating and spinning process accounts for the main part of the production cost, and most of this energy consumption is just to maintain high temperature, and the energy is eventually lost and wasted

[0003] The composition of medium-alkali glass (C glass) defined by the Chinese building materials standard JC 935-2004 is: 66.5%-67.5% SiO 2 , 5.8-6.6wt% Al 2 o 3 , 9.2-9.8wt% CaO, 3.9-4.5wt% MgO, 11.6-12.4wt% R 2 O, where K 2 O≦0.4wt%, no more than 0.4wt% Fe2O3; C glass has acid resistance, but poor alkali resistance, because it contains alkali (R 2 O) is high, and alkali metal ions are easily precipitated in a humid environment to form an alkaline environment and further erode, greatly reducing its mechanical properties

[0004] The composition of alkali-resistant glass (AR glass) defined in the Chinese building materials standard JC 935-2004 is: 59.2-60.8wt% SiO2, not more than 1wt% Al2O3, 4.0-5.0wt% CaO, 13.9-16.1wt% R 2 O with 2.2-2.8 wt% K 2 O, no more than 0.5wt% Fe2O3, 5.5-6.5wt% TiO2, and 13.7-15.3wt% ZrO; AR glass has strong corrosion resistance, but due to the large amount of expensive ZrO and TiO contained in the glass composition 2 , the molding temperature is as high as 1300°C, making its manufacturing cost extremely high, which is more than twice that of ordinary glass fiber, making it impossible to promote and apply it on a large scale

[0005] Both C glass and AR glass are alkali-containing glasses, and R 2 The O content is much higher than 1.2% (alkali-free glass requires R 2 O≦1.2%), C glass has always occupied a part of the commercial glass fiber because of its acid resistance, suitable for fine fiber spinning and much lower cost than AR glass, and its special composition and melting characteristics design, it is a "material" "Longer" glass (compared to E glass, ECR glass and AR glass), the roots must be cooled by water pipes to form when drawing, and it is impossible to achieve large drain plate and high flow drawing, resulting in energy consumption in the commercial production process. The cost ratio is high, and the investment in precious metals for 10,000 tons of production capacity is large. These shortcomings restrict its development.

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