Composite defoaming agent and application thereof in production of bottle and can vessel glass

Abstract

The invention discloses a composite defoaming agent and an application thereof in production of bottle and can vessel glass. Specifically, the composite defoaming agent comprises a main component anda solvent component, and the main component comprises a defoaming agent and a bubble wall thinning agent. The invention also discloses a method for producing the bottle and can vessel glass by using the composite defoaming agent and the application of the composite defoaming agent in production of the bottle and can vessel glass. According to the composite defoaming agent disclosed by the invention, new small bubbles are generated through the bubble wall thinning agent applied to the bubble wall of floating molten glass, so that the effect of thinning the bubble wall is achieved; meanwhile, byreducing local viscosity and surface tension of the bubble wall, bubble breakage is promoted, so that breakage of a bubble layer on the surface of molten glass in different temperature areas of a kiln can be accelerated without increasing the highest temperature of the bottle and can vessel kiln, the bubble discharging efficiency of the molten glass is improved, and the influence of bottle and can vessel glass bubble defects is reduced.

Description

[0001] This application is a branch of an invention patent application with the application number "201710389033.3", the application date of "May 23, 2017", and the invention title "A Composite Defoamer and Its Application in the Production of Glass for Bottles and Containers". case application. technical field [0002] The invention belongs to the technical field of melting in the production process of glass for bottles, containers, and more specifically relates to a composite defoamer and its application in the production of glasses for bottles, containers and containers. Background technique [0003] In the production process of bottle and container glass, because raw materials such as silica sand, feldspar, soda ash and nitrate will release CO during pyrolysis and melting 2 , NO / NO 2 、H 2 A large amount of gas such as O will form a large number of bubbles in the molten glass. The bubble layer almost covers the non-ingredient coverage area in the glass kiln for bottles ...

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Problems solved by technology

[0005] However, although the use of clarifying agent can promote the increase of a large number of bubble diameters to float to the surface of the glass liquid, since the surface tension of the glass liquid itself does not change, except for a few bubbles with particularly large diameters, they will rupture after floating to the surface of the glass liquid. After the bubbles float to the surface of the molten glass, they will gather together and stack up to form a foam layer. The existence of the foam layer prevents the floating efficiency of the bubbles in the molten glass on the one hand, and on the other hand, it will form between the molten glass and the burning flame on the upper part of the kiln. A layer of reflective and heat-insulating layer, which affects the absorption of heat by the glass liquid

By continuously heating the glass liquid to promote the discharge and rupture of the bubbles, on the one hand, the existence of the foam layer will affect the heating efficiency; In order to ensure the bursting of all bubbles on the surface of the molten glass, the temperature of the molten glass must be heated to a high level, which will consume a lot of energy. At the same time, the long-term ultra-high temperature will also affect the overall life of the glass furnace for bottles and containers.

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