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Blaine and Production

Grinding finer always costs tonnes. This puts a number on it. Tell it what you make today and how fine it is, and it will tell you what you would make at a different fineness — and the other way round, what fineness your current output can actually hold. Press YOUR MILL TODAY to type it in.

Why this matters now

Clinker reduction, high electricity prices and tighter cement specifications put the grinding circuit under pressure. The fastest gains usually come from finding the real constraint before changing equipment or operation.

What this tool helps decide

Turn plant measurements into a checked engineering decision and an editable report.

What subscription adds

Build a connected grinding audit: save every mill separately, reload previous measurements, compare changes over time and issue an editable report for the plant team.

Connected to the industry conversation around clinker-factor reduction, grinding energy, blended cement and quality control reported in World Cement, CemNet and Global Cement.See process-tool plans

The trade-off, for your mill

Where you are now

One operating point you trust — a shift where the tonnage and the lab result were both solid. Everything is measured against this.

Production you get today Tonnes per hour of finished cement.

Blaine you get at that tonnage cm² per gram.

Where you want to be

Blaine you want cm² per gram. Higher means finer, and always fewer tonnes.

Or: the tonnage you are actually running Tonnes per hour. The tool works backwards from this to tell you what Blaine that output can hold. Leave 0 to skip.

By residue instead

If your lab reports residue rather than Blaine, formula #5 answers the same question from a sieve. Leave both at 0 to skip.

Residue you get today% retained.

Residue you want% retained. Lower means finer.

AT THE FINENESS YOU WANT

AT THE TONNAGE YOU RUN

By power form #4b

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By exponential #4

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Between the two methods

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Change from today

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Blaine that output holds

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Round-trip check

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Production by residue #5

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Tonnes lost per 100 Blaine

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What this means

Is the mill actually capable of it?

This says what the trade-off costs. Whether the drive can carry the extra circulating load that comes with grinding finer is a separate question.

Check the drive

How the numbers are worked out

Two formulas, both yours, both shown. NPB = OPB / exp((NB − OB) × 0.49 / 1000) is formula #4, the exponential form. NPB = OPB × (OB/NB)^1.3 is #4b, the power form. They answer the same question different ways and normally land 3 to 4 % apart. That gap is the honest width of the answer, so both are on the board rather than one being picked for you.

Backwards. #4b rearranged gives NB = OB × (OPB/P)^1/1.3 — the Blaine your current tonnage can hold. That is exact algebra on the same formula, not a second model, and the tool proves it by feeding the answer back through #4b and checking the tonnage returns to where it started.

By residue. NPR = OPR × (2 − log OR) / (2 − log NR) is formula #5, for when the lab reports a sieve rather than a Blaine.

These are calibration relationships, not physics. They are anchored to the operating point you type in. Anchor them to a shift you actually trust, and re-anchor whenever the circuit changes.