Glass is an inorganic non-metallic material that is widely used and has a wide range of applications. It can be used in construction, daily use, art, instruments and other fields, and its types are very rich. In addition to the commonly used tempered glass and printed glass, there are also optical glass, dimming glass and other types with higher technical requirements.
1. Working principle of float glass tank furnace
The working principle is that the two liquids have different specific gravities, one floats on the top and the larger specific gravities are below. Float glass is formed in the tin bath, that is, the molten glass liquid flows continuously into the tin bath from the overflow channel and the flow channel, spreads on the tin liquid surface and drifts forward under the traction of the transmission roller. Under a certain temperature system, it relies on surface tension and gravity to complete flattening and thinning. After cooling, the glass is lifted by the transition roller table, leaves the tin bath and enters the annealing kiln, and then undergoes cross-cutting, inspection, and packaging. The special process produces float glass with good quality, many varieties, high output and long operation cycle. Characteristics of float glass: smooth surface without ripples, good permeability; flexible matching of specifications to reduce slicing losses; materials for manufacturing various processing levels can be provided.
2. What is a glass all-electric melting furnacae?
Glass all-electric melting furnace - also called all-electric melting furnace, also called electric melting furnace. When people discovered that high-temperature glass can conduct electricity, electricity can be used as a heat source to melt glass, that is, electric melting furnaces are used to melt glass. Electric melting furnaces have gradually begun to partially replace flame kilns. Glass pool kilns heated by flame surfaces have a long history. Although many improvements have been made in structure during long-term use, there are still some serious shortcomings: such as low thermal efficiency, kiln body The structure is complex, the volume is huge, and the working environment is bad. In the late 1940s, electric melting furnaces were actually used for commercial production. From the use effect, the advantages of electric melting furnaces are outstanding, which are: high melting rate, simple structure, high degree of automation and good working environment. Its main principle is to use electric energy as heat source. Generally, silicon carbide or molybdenum disilicide resistance heating elements are installed on the side wall of the kiln chamber for indirect resistance radiation heating. Some crucible kilns for melting special glass use induction heating, which relies on eddy currents induced in the kiln and glass liquid for heating. The tank kiln directly uses the glass liquid in the kiln as a heating resistor, which can be heated at different levels of the glass liquid. Multiple groups and layers of electric furnaces are arranged at different locations to heat the glass liquid, and the temperature system is controlled by adjusting the power consumption. When this method is used, the temperature of the space above the glass liquid surface is very low (called the cold furnace top), so the energy is basically consumed in melting glass and heat dissipation of the kiln wall. There is no heat loss caused by flue gas and no pollution to the environment when the flue gas is discharged. The heat utilization rate is high, and there is no need to set up a combustion system and a waste heat recovery system. The battery kiln can be automatically controlled, with fewer management personnel and good working conditions, but the power resource consumption is large. It is suitable for melting refractory glass, volatile glass and dark glass. The large battery kiln can produce 150t of bottle glass per day.
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