Medicinal neutral borosilicate glass melting furnace capable of homogenizing and clarifying

Abstract

The invention provides a medicinal neutral borosilicate glass melting furnace capable of homogenizing and clarifying. One or more rows of bubbling systems are arranged at the bottom of the glass melting furnace; a bubble discharging kiln ridge is arranged at the downstream of the bubbling system; the bubbling system and the bubble discharging kiln ridge are both arranged along the vertical direction of the longitudinal center line of the glass melting furnace; a perforated brick is arranged in the middle of the bubble discharging kiln ridge, a kiln ridge cushion brick is arranged at the bottomof the bubble discharging kiln ridge, kiln ridge tiles are arranged in the upstream side and the downstream side of the perforated brick respectively, a cooling water bag is placed in the middle of the perforated brick, and homogenization and clarification of medicinal neutral borosilicate molten glass are jointly achieved through the bubbling system and the bubble discharging kiln ridge. Compared with an existing melting furnace vertical stirring system and a bubble discharging furnace ridge built by inverted-U-shaped bricks, the problems of homogenization and subsequent clarification causedby high viscosity of medicinal neutral borosilicate glass liquid can be effectively solved, and the purposes of energy conservation and efficiency improvement in the production process of the medicinal neutral borosilicate glass are achieved.

Description

technical field [0001] The invention relates to the technical field of glass production, in particular to a medicinal neutral borosilicate glass melting furnace capable of homogenization and clarification. Background technique [0002] According to the relevant pharmaceutical packaging standards issued by the State Food and Drug Administration, pharmaceutical packaging materials refer to packaging materials and containers that directly contact pharmaceuticals, and glass materials are widely used in biological products, Injections and other fields. At present, the glass materials involved in pharmaceutical packaging materials can be divided into borosilicate glass and soda-lime glass according to their composition, while neutral borosilicate glass has a small expansion coefficient, strong resistance to extreme cold and extreme heat, and mechanical strength. High, strong impact resistance, good chemical stability, high acid and alkali resistance and water resistance, etc., gr...

AI Technical Summary

Problems solved by technology

On the one hand, in the manufacturing process of neutral borosilicate glass, due to the different densities of raw materials such as silica and boron oxide, there will be stratification of molten glass in the melting furnace, which will affect the quality of the final product

On the other hand, although neutral borosilicate glass has excellent performance, due to its high content of boron and silicon, the bonding energy between glass network structures is strong, which is reflected in the high liquid phase viscosity of glass liquid at high temperature.

[0004] At present, vertical stirring systems are used in other types of glass manufacturing industries to solve the problem of glass liquid stratification. However, due to the high viscosity of neutral borosilicate glass liquid, it is difficult to use the stirring system to cover the entire melting furnace, making the bottom of the melting furnace The delamination problem of glass liquid still can't be solved

Moreover, most of the stirring rods of the existing stirring system are made of platinum, which is expensive and the maintenance cost is very high.

The high-viscosity glass liquid also makes it impossible for the generated bubbles to float up and discharge by themselves, so it is difficult to transfer to the production line of neutral borosilicate glass

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