The following is the operational standard for graphite electrode installation for reference and implementation:
Graphite Electrode Installation Operation Standard
I. Pre-Installation Preparation
1,Electrode Inspection
Check the electrode surface for cracks, chips, or transport damage. Ensure the threaded holes and connector threads are intact.
Clean the electrode threads and contact surfaces to remove dust, oil, or debris.
Verify that the electrode specifications (diameter, length, grade) meet process requirements.
2,Tool and Equipment Inspection
Ensure lifting equipment (crane, clamp) is functioning properly, with no wear or deformation.
Prepare specialized wrenches, torque wrenches (set to manufacturer-recommended values), insulating washers, etc.
Inspect the furnace for residual electrodes or debris at the bottom.
3,Safety Measures
Operators must wear heat-resistant gloves, face shields, safety shoes, and other PPE.
Confirm that the furnace is powered off and locked (LOTO procedure) to prevent accidental energization.
II. Installation Procedure
1,Lifting and Alignment
Use a dedicated clamp to lift the electrode vertically, avoiding impacts or tilting.
Align the centerlines of the upper and lower electrode threads before slow insertion. Never force threading.
Hand-tighten initially to ensure smooth engagement before using tools.
2,Tightening Process
Tighten in stages (e.g., 50% torque first, then 100%) to ensure even force distribution.
After tightening, check vertical alignment (deviation ≤1% of electrode length) and adjust if necessary.
Install electrode clamps or supports to prevent loosening.
3,Joint Treatment
Apply anti-oxidant (e.g., graphite paste) to the joint to minimize oxidation.
Install insulating washers (if required) to prevent current leakage.
III. Post-Installation Verification
1,Electrical Inspection
Measure insulation resistance between the electrode and furnace body (typically ≥1MΩ).
Check the contact surface between the copper clamp and electrode for tightness, oxidation, or arcing marks.
2,Test Run
Conduct a no-load power test to observe current stability.
Gradually heat to process temperature and monitor electrode heating uniformity.
IV. Safety Precautions
Never disassemble or install electrodes before they cool to room temperature.
Do not strike electrodes with metal hammers to avoid brittle fractures.
During team operations, follow unified commands to prevent lifting accidents.
In case of abnormalities (e.g., electrode glowing, crack propagation), shut down immediately.
V. Maintenance & Documentation
Regularly inspect electrode wear and adjust length or replace as needed.
Record installation torque, operator details, and any anomalies.
Dispose of waste electrodes per environmental regulations to prevent dust pollution.
Appendix: Common Troubleshooting
Thread Jamming: Lubricate with graphite powder; avoid forced tightening.
Electrode Breakage: Shut down, remove fragments, and inspect the furnace.
Strict adherence to this standard extends electrode lifespan and ensures operational safety. Specific parameters must comply with the manufacturer's technical manual and equipment process requirements.