Molybdenum News Center

Plate electrode is rare in the electric melting. When it is used in the melting tank, the flow control effect is different from the conventional hot (or heat dam) controlled the main components of the electrode plates are parallel electric power line, a more uniform release of energy between the two electrode plates, the plate electrode melting furnace if there is a hot, nor is it a point, but a region. It is not to strong convection homogenization and clarification of glass (compared with the stick electrode), but can still produce high-quality borosilicate glass. Melt pool plate electrode structure is: Molybdenum and molybdenum rod coupling plate, tail superalloy cited by electricity, and water jacket protection. Molybdenum plate thickness and melting furnace should be a function of the glass variety, the choice of thickness and furnace refractory life should be balanced. At present, the domestic development of bimetallic dry cold electrode material used for artificial pick spout channel and electrically heated, its thickness in soda-lime glass, when the furnace is generally greater than 4 years 8 ~ 15mm, the hard glass of 6 ~ 8mm. Plate-like electrode has a greater area of ​​choice, the basis of the current density 0.6A/cm2 extrapolated.

 

No difference between the water-cooled and water-cooled electrode of molybdenum long life that the former barrier electrode cooling water at a high temperature in the electrode, the electrode during operation does not substantially consumed. Electrodes fixed in a stainless steel protection tube furnace brazing the cold side wall welded shut. The hot end of the furnace of molten glass flow into protective casing, sealing the hot end, so molybdenum electrodes in ensuring the protection of the casing, and the air is completely isolated from the electrode oxidation does not occur. Outside the protective casing coated with several layers of glass cloth, of stainless steel at high temperatures can prevent the skin from the scales.

 

No water-cooled cooling water barrier because molybdenum electrodes, the electrodes operate at high temperatures, less heat loss, saving water saving. This electrode structure is particularly suitable for small melting furnace, because there is no water cooling, the kiln temperature uniformity. Currently, many of the glass furnace, in order to improve the working conditions, the temperature increase near the wall of the kiln, the kiln average temperature increase zone near the kiln wall mounted electric boosting means certain, in this case, the electrode water cooling is suitable, but non-water-cooled with a long life of the electrode is desirable. Long life without water cooling structure oxidation of molybdenum are very reliable, with this structure, the electrode may be three or more stable operation. Factory at 1380 ℃ using a non-water-cooled plate-molybdenum electrodes eight months of shape complete, but protective casing has been cut in half. Knock off the three-phase interface, can be seen in the protective casing protection and new, like molybdenum rod, molybdenum rods in the three-phase interface of a square cross-section of sharp edges, clear, no traces of oxidation. Protective casing itself is intact under the action of the molten glass.

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