Composite defoaming agent suitable for soda-lime-silica glass and using method thereof

Abstract

The invention relates to a composite defoaming agent for eliminating bubbles in the glass production and a using method thereof, and relates to a composite defoaming agent suitable for soda-lime-silica glass, which is prepared by mixing a main component and a solvent, wherein the mass ratio of the main component to the solvent is 1: 2-25; the main component is prepared from the following raw materials including titanium powder, titanium dioxide, tetrabutyl titanate, ammonium molybdate, vanadium oxide, tungsten oxide, lead oxide, borax,which in percentage by mass: 1-15 weight percent of titanium powder, 1-30 weight percent of titanium dioxide, 50-79 weight percent of tetrabutyl titanate and 1-20 weight percent of ammonium molybdate, 0.5-5 weight percent of vanadium oxide, 0.5-5 weight percent of tungsten oxide, 0.5-5 weight percent of lead oxide and 1-20 weight percent of borax, wherein the sum of mass percentages of raw materials is 100 percent. The composite defoaming agent has the advantages of good defoaming effect, high temperature resistance and good compatibility, and can be used for quickly eliminating bubbles in the glass production process.

Description

technical field [0001] The invention belongs to the technical field of melting in the glass production process, and in particular relates to a composite defoamer used for eliminating air bubbles in glass production and a use method thereof. Background technique [0002] With the popularity of glass oxy-fuel combustion furnaces, the adverse effects of oxy-fuel combustion also need to be resolved urgently. Due to the high oxygen content, fuel combustion will produce a large amount of carbon dioxide and water vapor, which will cause a large number of tiny foams on the surface of the glass liquid. The foam layer almost covers the non-batch covered area in the float glass furnace, and the thickness of the foam layer is 5mm-100mm, or even thicker. On the one hand, the appearance of the foam layer hinders the efficiency of heat transfer from the flame space to the molten glass, which increases the production energy consumption. On the other hand, it also causes the air bubbles in...

AI Technical Summary

Problems solved by technology

Although its defoaming effect is good, tetrabutyltin is toxic and should not be used on a large scale

[0004] Chinese patent application CN107056044A discloses a compound defoamer suitable for the production of liquid crystal glass, which contains pentaferric iron in its main component. The improvement of the defoaming effect, on the contrary, the addition of pentamethylene diferron will lead to the increase of the iron content in the liquid crystal glass, which will affect the transmittance of the glass

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