Molybdenum News Center

According to various furnace design and production process requirements, the electrode has a plate electrode, the electrode rod and ball electrodes three structures. In actual use, the electrode may be designed to carry two types of continuous type or a long life. Continued progress in the electrode during operation of the furnace, continuous consumption of the electrodes, in order to ensure the normal working length, and intermittently pushing the electrode to the kiln, and long life required molybdenum electrode base electrode is not consumed during operation, and the electrode life the life of the furnace quite. 

 

Although molybdenum electrodes plates, rods, balls three structures, but the three structures in the kiln installation conditions are the same. The entire electrode is divided into four regions, A-electrode body in the kiln, is covered by the molten glass; B-electrode, the molten glass, air-phase joint surface, called the three-phase interface; C-heat-affected zone; D-low temperature . Temperature close to the temperature of the three-phase interface of the molten glass, the region due to the combined effects of the media and air electrode corrosion is most serious. Heat-affected zone effect of heat conduction, temperature up to 800 ℃ ~ 1000 ℃, in a kiln due to the cooling effect of the low temperature region, the temperature can be reduced to 150 ℃ ~ 200 ℃. Molybdenum oxide kinetics analysis, the three-phase interface and the temperature of the heat-affected zone in excess of molybdenum oxidation temperature, oxidation requires absolutely reliable measures. Oxidative cleavage of molybdenum furnace demolition site analysis found that the position of the electrode breakage, without exception, are in front of the heat-affected zone, close to the vicinity of the three-phase interface, there are many breaks MoO3 powder. Heat-affected zone and prevent oxidation of the three-phase interface of two ways, i.e., the temperature of these two regions the temperature drops below the molybdenum oxide, or they may be completely isolated from the air. 

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