Start with evidence, not a dosage change
Separate feed, grinding, classification, ventilation, quality-target and dosing causes before changing the grinding-aid dosage.
Diagnostic checklist
- Confirm feed interruptions and weigh-feeder accuracy
- Compare clinker/addition grindability and moisture
- Inspect ball charge, liners or VRM grinding condition
- Check separator and recirculating load
- Verify ventilation and temperature
- Confirm dosing pump delivery and product identity
Minimum comparison data
Keep timestamps for material composition, t/h, power, kWh/t, Blaine, residue, temperature, separator settings, product batch and actual dosage. Quality samples should match the process-data period.
Escalation path
- Stabilize safe operation.
- Confirm instruments and dosing calibration.
- Restore a documented baseline.
- Change one variable at a time.
- Request a technical review when the root cause remains unclear.
Standards & method references
- ASTM C465 — Processing additions for hydraulic cement manufacture
- ISO 679:2009 — Cement strength test method
- ISO cement, gypsum, lime and mortar standards catalogue
The applicable standard, edition and local regulatory requirement must be confirmed for each project. A reference does not claim product compliance.