A kind of vacuum defoaming method for improving the clarification quality of molten glass liquid

Abstract

The invention relates to a degassing method for improving the clarification quality of molten glass, which is characterized in that it comprises the following steps: a group of stirring rods (11) are arranged on the decompression shell (5), and the lower ends of the stirring rods are connected with stirring teeth ( 12), the stirring teeth are set in the molten glass (19); the stirring rod is driven by the power transmission device (21) to rotate, the stirring rod drives the stirring teeth to rotate in the molten glass, and the stirring teeth will dissolve in the molten glass after rotating gas discharge. The invention has the advantages that the effect of vacuum degassing can be improved by forced stirring of the molten glass under reduced pressure, the molten glass can be homogenized, and the clarification quality of the molten glass can be improved.

Description

technical field [0001] The invention relates to a method for improving the quality of float glass, in particular to a vacuum degassing method for improving the clarification quality of molten glass liquid. Background technique [0002] With the continuous improvement of my country's float technology level, the current production of flat glass in my country has reached a considerable scale, and the quality of float glass has reached the technical level of developed countries. With the substantial increase in the application of glass deep processing, microbubbles in float glass have become one of the important defects affecting glass quality. [0003] In the past, in order to improve the quality of glass, glass manufacturers performed clarification treatment on high-temperature molten glass before forming. The clarification treatment was based on the clarification process of removing bubbles generated in molten glass. Methods for clarification include: [0004] a. The method...

AI Technical Summary

Problems solved by technology

[0004] a. The method of reducing air bubbles and improving glass quality by increasing the temperature of the molten glass, this technical solution consumes a lot of energy, which not only increases the production cost, but also is not conducive to the realization of energy saving and emission reduction

[0005] b. Adding clarifier to the glass raw material, this method can achieve a certain degassing effect, but the arsenic and antimony elements contained in the clarifier will bring certain pollution, and at the same time, the addition of the clarifier will introduce secondary Bubbles, therefore, the clarification effect of molten glass is not complete, which affects the quality of formed glass

[0006] c. Simple mechanical stirring, although this method can destroy the foam existing on the molten glass, it will cause turbulent flow of the molten glass flow, resulting in the generation of new bubbles and degrading the quality of the glass

After extensive searching, no ideal technical solution has been found

Images