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【Know Molybdenum】 Optimization of Molybdenum Electrodes for Glass Melting Furnace

Various studies have shown that the failure mode for molybdenum electrodes of glass melting furnace is a complex phenomenon. It depends on chemical composition of the electrode, current density and chemical composition of the glass melt, etc. Its performance optimization can be achieved with surface finish, impurity content control and so on. 

1. Surface Finish

Size tolerance and surface smooth of electrode can be ensured by machining and grinding surface to avoid surface contamination when it is installed in the holder. 

2. Control of Impurity Content

The production of moly electrode requires high-quality molybdenum powder. Impurities will cause cracks or hidden cracks of electrode; C and N contents will cause bubbles in the glass liquid, which will affect the quality of finished glass; metal elements such as Ti, Ni, Cu, CD will make the glass colored.

3. Control of Molybdenum Powder Particle Size

It is concluded that the molybdenum powder with medium particles and close to normal distribution is the best material for producing high-quality molybdenum electrode products, according to the production experience and data analysis.

4. Sintering of Moly Electrode

In order to reduce the temperature difference between inside and outside of blank molybdenum electrode, slow and smooth temperature rise and stage heat preservation system are adopted to prevent hidden cracks caused by excessive thermal stress. Appropriate holding temperature and holding time can ensure fine and uniform grain structure.

5. Forging of Moly Electrode

Adopting appropriate forging process, especially appropriate forging temperature, final forging temperature, deformation and deformation.

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