Threaded molybdenum electrodes
Threaded molybdenum electrodes (glass electro-fused molybdenum electrodes)
Solid molybdenum rods with external threaded connection ends, mainstream model of glass kiln furnaces
comparison of product parameters
| Products name | Glass electro-fused molybdenum electrodes |
| Products Grade | Mo1 High-purity molybdenum |
| Molybdenum content | Mo ≥ 99.95% |
| Total impurity content | ≤0.05% ,Impurities, especially oxygen and carbon, are excessive. Under high temperatures, they are prone to cracking, oxidation, and burning damage, which is the core reason for electrode failure |
| Main impurities controlled | C ≤ 0.01%, O ≤ 0.008%, N ≤ 0.005%, Fe, Ni, Si ≤ 0.005% |
| Density | 10.2 g/cm³ |
| Melting point | 2620℃ |
| Working temperature | Long-term use 1100 - 1700℃ (glass melting condition) |
| Tensile strength | ≥ 450 MPa |
| Resistivity | 5.7 × 10⁻⁸ Ω·m |
| Thermal expansion coefficient | 5.3 × 10⁻⁶ /℃ |
| Surface condition | Turning and polishing, no cracks, peeling, burrs; one end processed with external threads for assembly |
| Specifications | Diameter Φ20 - 70mm, length customized according to customer drawings, thread size customizable |
Production Process Flow
High-purity molybdenum powder
1
>>
Isostatic pressing
2
>>
High-temperature sintering
3
>>
Forging / Rolling densification
4
>>
Rough machining of the rod
5
>>
Precise threading processing
6
Surface grinding and oil removal
7
>>
Full inspection of appearance and flaw detection
8
>>
Dimensional inspection
9
>>
Packaging
10
>>
Dispatch
11
>>
After-sale Services
12
1. Powder metallurgy sintering： Obtain molybdenum billet.
2. Forging densification： Improve density, mechanical properties, and reduce pores; (Forged molybdenum > Sintered molybdenum, the lifespan gap is significant)
3. CNC machining： Precision machining of the outer circle of the rod, one end processed with external threads to ensure thread assembly accuracy.
4. Grinding and oil removal： Remove processing oil stains and burrs.
5. Inspection： Dimensional, appearance, flaw detection, and internal cracks and pores check.
Core points to focus on during purchase
1. Material grade and density
Prioritize forging MO1, with a density that must meet the standard; ordinary sintered molybdenum has a low density and many pores, and the electrode will quickly bulge and break when exposed to glass melt.
2. Thread processing accuracy
The thread is the receiving force and conductive part. Poor tolerance will make assembly difficult, and the contact resistance will increase, causing overheating and burning damage during operation.
3. Dimensional tolerance： Diameter, total length, thread specification, thread segment length, must match the installation dimensions of the kiln furnace.
4. Purity indicators (oxygen content is particularly critical)
High oxygen content makes the electrode prone to oxidation and powdering under high-temperature conditions, significantly reducing the electrode lifespan.
5. Surface quality： No cracks, scratches, pores, or folding defects. Small cracks will rapidly expand and fail at high temperatures.
6. Actual working condition parameters： Glass type, working temperature, current load, to match the appropriate diameter grade.
7. Delivery cycle： Large-diameter forged molybdenum electrode production cycle is long and will be longer than the conventional size production cycle.
Points to note during procurement
1. ❌ Pit 1： Low-cost sintered molybdenum imitates forged molybdenum electrodes
Sintered molybdenum has a low cost and many internal pores, and will be damaged in a short period. When purchasing, be sure to confirm： forging process, density ≥ 10.15 g/cm³
2. ❌ Pit 2： Excessive impurity oxygen content
3. ❌ Pit 3： Rough thread processing, non-compliant tolerance
The thread tooth shape is not standard, and it cannot be installed on site or has poor contact and overheating and burning damage; provide thread drawings when placing an order, clearly define the thread standard.
4. ❌ Pit 4： Only focus on diameter, ignoring the effective working length
Total length, the effective length buried in the glass melt, thread segment length are incorrect, and it will be impossible to assemble on site. Must provide complete drawings, do not just report the diameter.
5. ❌ Pit 5： Ignore transportation protection
Molybdenum electrode rods are long and the threads are prone to damage, and the threads are damaged, the entire electrode will be scrapped; The manufacturer should provide protective sleeves for the threads and use shock-proof packaging for the wooden boxes.
6. ❌ Pit 6: Select specifications without confirming the working conditions
The corrosion degree of different glass formulas varies greatly, and the lifespan of the same diameter electrodes differs significantly. It is necessary to inform the supplier of the kiln furnace conditions to facilitate the recommendation of specifications.
7. ❌ Pit 7: No factory inspection upon arrival
Upon receiving the goods, check the diameter, total length, threads, and appearance, and check for minor cracks; if possible, conduct density sampling to avoid defective products being directly put into the kiln furnace and causing production halt losses.
Contact person :Tracy
Our address
Baoji city, shaanxi province , China
Phone Number
+86-18291730106
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