Molybdenum News Center

Molybdenum Glass Melting Electrode Used In Glass Furnace

After World War II, molybdenum electrodes have been widely used in the glass industry. Molybdenum electrode not only can well infiltrate in molten glass, having small contact resistance, but also the electrode surface can withstand higher current density, approximately 1 ~ 3 A/cm². Besides, the electrode has low heat loss. What’s more, it is not easy to color the glass, while at the high temperature it is easily oxidized to produce MoO3 at 600 ℃, but MoO₃ will not react with the glass, having low effect on glass. China domestic glass furnace electrode materials are mostly molybdenum electrodes and proper using molybdenum electrodes can increase the life of electrode and glass furnace.

If molybdenum electrode surface temperature is higher than 2000 ℃, having great loss on electrode, and the surface temperature is associated with the surface current density, and therefore, the greater the surface current density, the faster the loss. Using in glass furnace, the molybdenum electrodes should adopt lower surface current density, which is conductive to improve the glass quality and extend the life of the electrode. The surface density of the molybdenum electrode is 1.0 ~ 0.7 A/cm² most moderate, the maximum should not exceed 2A/cm². In addition, molybdenum electrodes use for high iron content glass or "E" glass production has small consumable. The length of molybdenum electrodes into furnace has some influence on electrode. Unsuitable length will cause rapid oxidation at high temperatures reducing electrode’s service life.

Molybdenum electrode usually manufactures by powder metallurgy method and after sintering and hot processed can obtain molybdenum electrode. Molybdenum electrode is generally made of rod-shaped and plate-shaped electrode is rarely. Common rod-shaped electrode diameters are between 32~50mm and the length is generally between 1~2m. The electrodes may be made with blunt end ligation thread, which is good for electrodes installation. 

• < Prev
• Next >