A kind of composite clarifier for producing light guide plate glass by float method

Abstract

The invention belongs to the technical field of float glass manufacturing and specifically relates to a compound clarifying agent for a light guide plate glass produced through a float glass process. The compound clarifying agent for the light guide plate glass produced through the float glass process provided by the invention is used for producing the light guide plate glass through the float glass process; 2.5-6g compound clarifying agent is added into 100g light guide plate glass; and the compound clarifying agent comprises the following raw materials by weight percent: 45-80% of diluent, 0.4-1% of sulfate, 21-47% of nitrate and 1-3% of cerium oxide. The compound clarifying agent provided by the invention, compared with a single clarifying agent, has a better clarifying decolorizing effect, can be more effectively applied to the float glass process and used for producing the light guide plate glass through the process and is capable of solving the problem of difficulty in removing air bubbles in the process of producing the light guide plate glass through the float glass process.

Description

technical field [0001] The invention belongs to the technical field of float glass manufacture, and in particular relates to a composite clarifier for producing light guide plate glass by float method. Background technique [0002] Light guide glass is a revolutionary light guide material, not only can be used in the field of TV, but also has the opportunity to be widely used in other fields; light guide glass requires high light transmittance, high refractive index, high heat resistance and other properties, At the same time, it is required to have better mechanical properties, which puts forward stricter requirements for glass quality. [0003] In order to meet the above requirements, in glass production, the method of adding glass clarifiers is generally used to clarify the glass liquid; glass clarifiers are important auxiliary raw materials in glass production, and most clarifiers can be used at high temperatures. Vaporization or decomposition releases gas, so that the ...

AI Technical Summary

Problems solved by technology

For the light guide plate glass, because of its low iron content, about 60ppm, if the traditional sulfur carbon clarifier is used, the amount of Glauber’s salt must be reduced, otherwise the SO remaining in the glass liquid 3 It cannot be completely absorbed by the glass liquid, but it is not conducive to the clarification of the glass liquid

But when the amount of Glauber's salt is very low, it can't help the molten glass, and the addition of carbon powder will also have a great impact on the iron content in the glass; Sulfur carbon clarifying agent is not the best choice

[0005] In the production of glass, when sodium pyroantimonate is used as a clarifying agent, sodium pyroantimonate decomposes to release oxygen at high temperature, and enters into the bubbles in the glass liquid, reducing the partial pressure in the bubbles and making it continue to absorb gas , the volume increases and is excluded from the glass liquid, and the clarification effect is better; however, when sodium pyroantimonate is used as the clarifier, a part will remain in the glass body in the form of antimony oxides, which will be lost in the production process of float glass. Introduce reducing protective gas N into the tin bath 2 +H 2 When the molten glass with sodium pyroantimonate as clarifier passes through the tin bath, the oxides of antimony will be reduced to free antimony in the reducing atmosphere of the tin bath, which will precipitate on the surface of the glass plate and seriously affect the quality of the glass; therefore, the Clarifying agents are not suitable for float process

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