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

The applicable standard, edition and local regulatory requirement must be confirmed for each project. A reference does not claim product compliance.

Cement Grinding Aid Mill-Trial Protocol