News · 2026-05-09
MoSi2 Heating Element Furnace Start-Up and Maintenance Notes
MoSi2 heating elements are brittle at room temperature and plastic at high temperature, so start-up, installation and replacement methods matter. These notes provide a buyer-facing checklist for installation and maintenance review.
Installation and holder notes
| Installation or operation item | Technical guidance | Buyer note |
|---|---|---|
| U type installation | Vertical hanging from the furnace crown is recommended. | This helps avoid mechanical stress on the hot zone. |
| Element holder | The holder bears the element weight and determines position. | Install carefully so the element is plumb. |
| Taper position | The lower taper part should extend into the furnace chamber. | Do not leave it in the furnace crown, which may cause local overheating. |
| Connection strap | Use aluminum braid wire or multi-layer aluminum foil. | The outside clamp secures the element and is not used as the conductor. |
| Clamp temperature | Generally not higher than 200℃. | Keep at least 50mm between the lower clip end and the upper brick surface. |
| Current limit note | 6/12mm should not be used long term at 170A; 9/18mm should not be used long term at 300A. | Send voltage, current and element diameter for review. |
Furnace start-up voltage steps
| Furnace type | Temperature range | Voltage step |
|---|---|---|
| Small furnace, power below 100kW | 20-150℃ | 1/3 working voltage |
| Small furnace, power below 100kW | 150-500℃ | 2/3 working voltage |
| Small furnace, power below 100kW | 500℃ to working temperature | Full working voltage |
| Large furnace, power 100-500kW | 20-300℃ | 1/3 working voltage |
| Large furnace, power 100-500kW | 300-700℃ | 2/3 working voltage |
| Large furnace, power 100-500kW | 700℃ to working temperature | Full working voltage |
New or long-idle furnaces should be dried before use. For large furnaces, stronger monitoring is recommended during the drying process.
Maintenance and replacement notes
When checking a damaged MoSi2 element, isolate the element from other straps before checking continuity. After replacement, block the gap with ceramic fiber and restart the power to the element bank carefully.
For a symptom-led inspection covering powdering, break position, deformation, terminal overheating and repeat failures, use the MoSi2 failure troubleshooting evidence checklist before the old element is removed.
Review MoSi2 heating element specifications, U type MoSi2 heating elements and W type MoSi2 heating elements, then send the furnace temperature, element grade, dimensions and electrical data through the RFQ form.
FAQ
How should U type MoSi2 heating elements be installed?
Vertical hanging from the furnace crown with a support clamp is recommended.
Why should MoSi2 elements avoid long low-temperature operation?
Long-term operation at 400-700℃ may cause powdering because of strong low-temperature oxidation.