METHOD FOR CONTINUOUS GLASS MELTING UNDER CONTROLLED CONVECTION OF GLASS MELT AND GLASS MELTING FURNACE FOR MAKING THE SAME

摘要

Energy sources, such as industrial glass burners (11), heating electrodes (10) and other suitable heating energy sources operate on the molten glass melt (6) containing undissolved particles, especially glass sand and bubbles, in the longitudinal axis of the melting space, or in a direction parallel with this longitudinal axis, until creation of one or more longitudinal temperature barriers in the glass melt (6) and until the arising of the cross temperature gradient [K.m-1] which generates spiral-type flowing of the glass melt (6) with a rotary movement across the melting space, and in fact perpendicularly to the longitudinal axis of the melting part. This spiral-type flowing proceeds in the direction from the front wall (2) to the submerged cross refractory barrier (7) in the glass melt (6), or in the direction from the front wall (2) to the cross row (9) of the energy sources. The transversal temperature gradient [K.m-1] of each spiral-type flowing is always set as higher than longitudinal temperature gradient [K.m-1] between the front wall (2) and the submerged cross refractory barrier (7) in the glass melt (6), or between the front wall (2) and the cross row (9) of the energy sources, as a consequence of which it is possible to utilise 0.6 to 0.8 multiple of the total melting space. The ratio of the cross temperature gradient [K.m-1] to the longitudinal temperature gradient [K.m-1] is higher than 1 and lower than 30, preferably it is within the range from 5 to 20. Energy sources, such as heating electrodes (10) and/or industrial glass burners (11) in the melting space are arranged for creation of one or more longitudinal temperature barriers in the glass melt (6) and for generation of the spiral-type flowing of glass melt (6) with a rotary movement across the melting part, in fact perpendicularly to the longitudinal axis of the melting part, and for the setting of the cross temperature gradient [K.m-1] of the spiral-type flowing higher than the longitudinal temperature gradient [K.m-1].