Glass melting device and melting method therefor

Abstract

The present invention provides a melting device for melting glass complex powder into high-quality molten glass and a melting method therefor. The glass melting device comprises an outer crucible, a bubbler tube, an discharge tube and a heating device, and further comprises an inner crucible with a convex curved surface body structure, wherein the bubbler tube is inserted into the outer crucible; the inner crucible is arranged on the bottom in the outer crucible and a plurality of through holes are formed inthe convex curved surface of the inner crucible. By changing the structures of devices such as the outer crucible, the inner crucible, the bubbler tube, the discharge tube and the like, the glass melting device can improve a flow path of the molten glass, optimizes the whole flow and residence time, effectively reduces an area in which the molten glass flows slowly around the inner crucible, improves the residence time concentration degree of the molten glass in the melting device and improves the uniformity of the glass components, thereby ensuring physical and chemical performances such as the refractive index, the the Abbe number and the like of a glass product to be more uniform and stable.

Description

technical field [0001] The present invention relates to a melting device and its melting method for glass production, in particular to the protection of the melting device used in the process of melting glass compound powder into molten glass, the optimization of the velocity field of the molten glass and the Improved technology to obtain stable and uniform glass physicochemical properties. Background technique [0002] As we all know, the glass melting process has the following five basic processes: 1) A series of physical and chemical reactions occur between the batch materials during the heating process to form a low-temperature eutectic of silicates or similar compounds; 2) The temperature continues to rise When the temperature is high, the viscosity of the eutectic decreases, and a uniform transparent glass liquid is gradually formed inside. At this time, there are still a lot of bubbles in the glass liquid; 3) After the temperature of the initial molten glass continues...

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Problems solved by technology

[0004] At present, when using precious metals to make small-scale melting devices, a single-layer crucible structure is generally used, and refractory materials are added, and a heating device is installed in the refractory material. This structure has the advantages of saving precious metals and reducing production costs. However, due to its structure It is too simple and has the following two disadvantages: on the one hand, when the powder is melted in the device to form glass liquid, the residence time distribution in the device is poor, which often leads to some glass melting quality problems, such as insufficient glass melting. Stones, stripes and other defects; on the other hand, when the powder contains strong reducing components, the reduced elemental substance is likely to damage the precious metal structure, or the raw material impacts the bottom of the crucible, causing damage to the bottom of the crucible and affecting the service life

[0005] CN204079751U discloses a double-layer crucible body design in which the inner crucible has a concave spherical surface, so as to improve the quality of glass bubbles and improve the quality stability of glass bubbles, and prevent the impact of added glass raw materials on the outer crucible body, but this device does not solve the problem of processing The gap between the inner crucible and the outer crucible caused by the process, high temperature crucible creep and other problems will cause deformation and affect the service life, further destroying the diversion effect of the bottom hole of the inner crucible on the glass liquid, and reducing the melting of the glass. quality

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