Composite debubbling agent applicable to liquid crystal glass production

Abstract

The invention discloses a composite debubbling agent applicable to liquid crystal glass production. The composite debubbling agent mainly comprises a main component and a solvent component, wherein the main component comprises a titanium compound-containing bubble breaker, a bubble wall thinning agent consisting of tin oxide and magnesium sulfate, and a solvent combustion efficiency optimizer pentadiiron; the solvent component contains diesel, aviation kerosene, heavy oil or a mixture thereof according to any ratio; the flash point of the solvent is higher than or equal to 38 DEG C; the main component is dissolved in the solvent or suspended in the solvent in the state of solid particles. Through the formation of new small bubbles on the walls of floating bubbles in glass liquid, the effect of thinning the bubble walls is achieved; moreover, through reduction of the local viscosity and the surface tension of the bubble walls, bubble breakage is promoted so as to achieve the purpose that breakage of the bubble layers on the surface of the glass liquid in different temperature zones of a kiln can be accelerated, without needing to raise the maximum temperature of the liquid crystal kiln, so that the bubble removing efficiency of the glass liquid is improved and the influence caused by liquid crystal glass bubble defects is reduced.

Description

technical field [0001] The invention belongs to the technical field of melting in the production process of liquid crystal glass, and more specifically relates to a composite defoamer suitable for the production of liquid crystal glass. Background technique [0002] In the production process of liquid crystal glass, because silica sand, sulfate, chloride and other raw materials will release SO in the process of pyrolysis and melting 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 liquid crystal glass furnace. The thickness of the bubble layer is 10mm to 100mm. The existence of bubble defects in the molten glass seriously affects liquid crystal glass products. The pass rate has become an important factor affecting production efficiency. [0003] Usually, in order to reduce the bubbles in the molten glass, the radius of the bubbles can be increased by adding...

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Problems solved by technology

[0004] 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 bursting 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 glass liquid, the temperature of the glass liquid must be heated to a very 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 liquid crystal glass furnace.

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