Method for electrically heating glass

Abstract

The invention discloses a method for electrically heating glass. The method includes the following steps: (1) raw material selecting: selecting glass with relatively clean surface as a raw material; (2) impurity removal and cleaning: soaking the glass selected in the step (1) in a liquid containing a surfactant, taking out the glass after soaking for 2 to 3 hours, and washing the glass with purified water; (3) pulverizing: adding the glass after impurity removal and cleaning in the step (2) into an ultra-micro pulverizer, and fully pulverizing to prepare glass powder; (4) drying treatment: adding the glass powder prepared in the step (3) into a powder dryer, drying, and continuously drying for 1 hour between 90 and 110 degrees; (5) preheating: introducing the glass powder dried in step (4)into a melting furnace, and heating the glass powder to 600 to 700 degrees by using a heating rod to reduce the viscosity of the glass powder. The method has the characteristics of good heating effect and high purity of the molten liquid.

Description

technical field [0001] The invention relates to the technical field of electric heating glass, in particular to a method for electric heating glass. Background technique [0002] Glass electrofusion is to introduce current into molten glass through electrodes. After electrification, the molten glass between the two electrodes generates Joule heat under the action of alternating current, so as to achieve the purpose of melting and temperature adjustment. The conductivity of molten glass is achieved by the migration of charges through its internal ions. The alkali metal ions in the silicate glass melt are relatively active, and they are the carriers of electric current. However, there are a small amount of alkali metal ions in quartz glass and boric acid glass melt, so their conductivity is poor. In soda-lime glass melt, apart from the number of ions, the strength and radius of ions also affect their conductivity. [0003] However, in the existing process of heating glass w...

AI Technical Summary

Problems solved by technology

[0003] However, in the existing process of heating glass with electric power, there are problems of poor heating effect and low purity of melt

If the glass does not remove the impurities on the surface, the melting point will become higher during the melting process, and the purity of the molten glass will decrease; in the solid state, the chemical bonds inside the glass are stable, and there are no ionic substances, so Weak conductivity, unable to conduct electric heating

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