Ladder type decompression de-foaming device for increasing clear quality of molten glass

Abstract

The invention relates to a ladder type decompression de-foaming device for increasing the clear quality of molten glass. The device comprises a melting tank (1), wherein the melting tank (1) is connected with a decompression de-foaming tank (3) through an ascending pipe (2); a set of exhaust vents are formed in the decompression de-foaming tank (3); an outer shell (4) is arranged on the outer side of the decompression de-foaming tank (3); a vacuum pump (5) is connected with the outer shell (4); a heat-insulating material (6) is filled between the outer shell (4) and the melting tank (1); and the decompression de-foaming tank (3) is connected with a reflux tank (8) through a descending pipe (7). The invention has the advantages that the device is used for performing ladder type decompression on the molten glass; after the pressure is reduced, the foam diameters of the foams in the molten glass are gradually increased and the foams quickly overflow, so that the de-foaming and clearing effects are achieved; and compared with a traditional fixed target negative pressure method, the device can more fully separate air bubbles from the molten glass, the clear quality of the molten glass is increased, and the energy consumption is greatly lowered.

Description

technical field [0001] The invention relates to the technical field of clarification of molten glass, in particular to a stepped decompression degassing device for improving the clarification quality of molten glass. Background technique [0002] Traditional molten glass is prepared under normal pressure, and the entire clarification process of molten glass is also completed under normal pressure. The molten glass obtained by melting raw materials is stored under normal pressure and at a specified temperature for a certain period of time. , so that the air bubbles in the molten glass are grown and floated up by the clarifying agent, and the air bubbles are removed. For glass that is difficult to clarify and has a high viscosity, there is also the following degassing method under reduced pressure: the entire degassing process of molten glass is completed under reduced pressure, and the degassing area is kept at a fixed negative pressure state, and the raw materials are melted...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the disadvantages of higher energy consumption, unsatisfactory glass clarification quality and more bubbles in the clarification process of molten glass at the present stage, and propose a stepped decompression degassing method for improving the clarification quality of molten glass device

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