Glass continuous melting furnace and melting method

Abstract

The invention relates to a glass continuous melting furnace and a melting method. The invention belongs to the technical field of optical glass smelting production equipment. The method mainly solvesthe problems that the local refractive index difference exists in the fluorine-phosphorus glass continuous smelting furnace and the internal stripes of the product are thickened. The device is mainlycharacterized by comprising an oxidation crucible, a homogenizing crucible, a clarification tank, a cooling crucible and a working crucible which are made of a platinum material, a melting crucible ismade of a high-aluminum ceramic material; the oxidation crucible, the homogenizing crucible, the clarification tank and the cooling crucible are respectively provided with a first gas inlet pipe, a second gas inlet pipe, a third gas inlet pipe and a fourth gas inlet pipe, the opening of the first air inlet pipe is arranged below the liquid level of the glass, the openings of the second air inletpipe, the third gas inlet pipe and the fourth air inlet pipe are arranged above the liquid level of the glass; the method comprises the following steps: (1) enabling the melting crucible to be in buttjoint with the oxidation crucible; (2) opening a crucible cover for loading, introducing O2 into the first gas inlet pipe, the second gas inlet pipe, the third gas inlet pipe and the fourth gas inletpipe; (3) melting, homogenizing, clarifying, and then slowly cooling; and (4) performing leakage injection molding. The method is used for continuous smelting production of the fluorine-phosphorus glass, and the internal quality of the product is improved, the yield of the fluorine-phosphorus glass product is improved, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of optical glass melting production equipment, in particular to a glass continuous melting furnace and a melting method, in particular to a glass continuous melting furnace and a melting method for continuous melting of fluorophosphorus glass. Background technique [0002] Fluorophosphate optical glass is a special optical glass with low refraction and low dispersion, which can eliminate secondary spectral chromatic aberration, improve the imaging quality of optical lenses, and has a low softening point, which can be made by one or two presses Aspheric lens is an excellent optical material for producing advanced digital products. However, fluorophosphorus glass is highly volatile and corrosive due to its high fluoride content. [0003] During the melting process of fluorophosphorus glass, all stages have a slight erosion effect on the platinum crucible wall, and the most serious stage is the melting stage o...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a glass continuous melting furnace and melting method for continuous smelting of fluorophosphorus glass, which is used to solve the problem of fluorophosphorus glass eroding the platinum crucible wall, avoid the generation of foreign matter in the product, and improve the yield of the product , and realize the uninterrupted continuous melting production of fluorophosphorus glass

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