Kiln device for melting heating of glass

Abstract

The invention discloses a kiln device for melting heating of glass. By a plurality of molybdenum rod electrodes which are vertically and uniformly distributed at the bottom of a pond and a combusting gun on a side wall of a kiln pond, electrical combined heating is formed, and the problem of unevenness of the temperature of vitreous humour of a glass kiln is solved. The temperature nearby the molybdenum rod electrodes, particularly the top ends of the molybdenum rod electrodes, is high; because the energy density nearby the molybdenum rod electrodes is high, nearby vitreous humour has high energy; the temperature of the vitreous humour with the unit mass nearby the molybdenum rod electrodes is increased, the vitreous humour flows upwards along the surfaces of the electrodes, and then moves along the center or a cold region, the vitreous humour of the cold region returns to a hot region due to change of static pressure, liquid flow flows from the surfaces of the electrodes, after meeting liquid flow which flows upwards at the top ends of the molybdenum rod electrodes, the speed and direction of the liquid flow are changed, the liquid flow can even return, a natural flowing direction and a forced flowing direction form an angle, then spiral combined flow which is homogenized with glass is formed, and evenness of the temperature of the vitreous humour is facilitated.

Description

technical field [0001] The invention relates to the technical field of glass heating and melting, in particular to a kiln device for glass melting and heating. Background technique [0002] In the flat panel display glass furnace, since the glass composition is mainly alkali-free silicate, the resistance of the glass liquid is relatively large, and the electric hybrid furnace is generally selected for the structure of the glass furnace. The molten glass in the glass furnace is generally heated by a tin electrode inserted horizontally. Although the tin oxide electrode has good chemical stability, high refractoriness, and small thermal expansion coefficient, it has poor thermal shock resistance. When the temperature is higher than 1500 ° C, it will volatilize The speed increases, and the glass liquid is a non-wetting interface, and the wear particles produced under the high-temperature glass erosion will stay in the glass liquid and pollute the glass liquid. In industrial pro...

AI Technical Summary

Problems solved by technology

The molten glass in the glass furnace is generally heated by a tin electrode inserted horizontally. Although the tin oxide electrode has good chemical stability, high refractoriness, and small thermal expansion coefficient, it has poor thermal shock resistance. When the temperature is higher than 1500 ° C, it will volatilize The speed is increased, and it is a non-wetting interface with the glass liquid, and the wear particles produced by the high-temperature glass erosion will stay in the glass liquid and contaminate the glass liquid

In industrial production, although it is convenient to install electrodes with horizontal side inserts, the current density at the end of the electrodes is much higher than other parts, resulting in uneven temperature distribution of the glass liquid in the glass furnace, and the electrodes are easy to corrode

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