1. Define the decision before dosing
State the primary objective—throughput, kWh/t, fineness, residue, handling or strength—and the quality limits that must remain equivalent. Define the measurement boundary for electrical energy.
2. Record a stable untreated baseline
| Area | Minimum data |
|---|---|
| Feed | Clinker, gypsum and additions; moisture; feed rate. |
| Mill | Mill type, circuit, motor power, t/h, kWh/t, temperatures and relevant control settings. |
| Separator / transport | Separator speed, airflow or differential pressure, recirculating load where available. |
| Cement | Blaine, residue, PSD where available, water demand, setting and 1/3/7/28-day strength. |
3. Calibrate dosing
Confirm the product grade, current density and pump/feeder calibration. For liquid product, verify actual collected mass or volume over a timed interval. Use the dosage calculator to translate g/t into kg/h.
4. Run controlled dosage steps
- Change only the grinding-aid dosage unless the test plan explicitly requires another variable.
- Allow sufficient residence and circuit-stabilization time.
- Record continuous process data and time-match cement samples.
- Do not accept higher t/h if fineness, residue or strength falls outside the agreed limit.
- Check for overdosing symptoms and dosing-line stability.
5. Compare economics without double counting
Calculate chemical cost, measured energy benefit and any genuinely saleable extra output separately. Do not count a throughput increase as revenue unless the plant can sell the additional cement and has no downstream constraint.
6. Trial record to retain
- Product name, batch and COA
- Dosage steps and calibration record
- Raw material and cement composition
- Timestamped process data
- QC samples and test results
- Operating observations and deviations
- Approved conclusion and next action
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.
Prepare the purchase review
Keep the evidence and assumptions with a named grade enquiry. These buyer guides complement the technical material above.
Build a trial review record
This blank worksheet organizes information for a supplier discussion. It is not an operating procedure, safety assessment, acceptance specification or permission to run a mill trial. The plant technical team must approve the actual plan and acceptance criteria.
Entries stay in this page until you download them. They are not saved by the website or sent to a supplier. Save before leaving or reloading; the download contains only the entries you chose to include. Do not enter confidential plant data on a shared device.
Keep three documents separate
- This page: the general review record and comparison boundary.
- IN-5 checklist: questions for the named grade, not a substitute for plant approval.
- Trial report checklist: checking whether a report supports the purchasing decision.
Review IN-5 product information before requesting the current grade documents.