Today
A conservative ratio absorbs variation
- Water-to-stucco is sized for the worst expected stucco.
- The same ratio can stay in place when stucco quality is better.
- Dispersant dosage is often tuned by experience and trial.
Stop drying waterthe slurry did not need.
Wallboard slurry often carries more gauging water than hydration requires, so the dryer can keep the board processable. INSUS models how much water the current stucco, admixture package and product need for stable flow and set, then recommends a safer floor for process engineers to review. Board quality stays a hard constraint.
01
Stoichiometric water is far below a flowable slurry.
02
Extra gauging water becomes dryer evaporation load.
03
Recommendations stay with process engineers.
The problem
Water is added for flow,then removed with gas.
Slurry needs enough water to stay flowable and fill the liners. That amount is usually well above what chemistry needs to hydrate plaster. Plants often keep a conservative ratio sized for the worst expected stucco. The challenge is finding the lowest ratio that remains safe for today's stucco, admixtures and product, rather than carrying the same margin batch after batch.
01Water added for slurry flow
02Board forms and sets
03Excess water evaporated
- 01Water added for slurry flow
- 02Board forms and sets
- 03Excess water evaporated
The shift
From a fixed ratioto a modelled floor.
Process engineers stay in charge of the mixer. What changes is whether the water setpoint follows the current stucco and product instead of a permanent worst-case margin.
With INSUS
The water setpoint follows the current process
- Recommended ratio is calculated for the current stucco and product.
- Flowability and set-time requirements stay hard constraints.
- Water and dispersant can be evaluated together against combined cost.
How it works
From stucco propertiesto a safe water setpoint.
This fits OptiStudio as operational decision support beside existing mixer controls. Day one is advisory: recommendations do not write dosing setpoints automatically.
Connect
Bring recipe, stucco and QC data together
Read-only links to mixer water and stucco metering, dispersant and admixture dosing, stucco lab results, MES production data, line speed, slurry temperature, dryer gas and board-quality results.
Understand
Learn how slurry behaviour changes on this line
Learn how water ratio, dispersant, stucco properties, temperature and admixtures have related to flowability and set behaviour on this plant's history.
Predict
Estimate the minimum ratio that meets constraints
Estimate the lowest water-to-stucco ratio expected to satisfy flowability and set-time conditions for the current stucco and board product, and the moisture load that would enter the dryer.
Advise
Balance water against dispersant cost
Rank water and dispersant options against dryer gas demand while respecting flowability, set time, board weight, hardness and paper-bond constraints. People approve any change.
Verify
Check advice against actual QC and gas
Compare recommendations with set time, board weight, dryer gas, reject rate, hardness and bond. Constraint breaches are treated as model failures, not acceptable trade-offs.
Getting started
Start with one lineand the records you already keep.
For wallboard plants that already meter mixer water and stucco, run stucco lab tests and track board QC and dryer gas. Delivered through OptiStudio as advisory process decision support. Expert Services can help with discovery and shadow-mode validation. No new sensors are assumed where recipe metering and QC already exist.
- What we need. Water, stucco and admixture dosing records; stucco consistency and free/combined water results; line speed, slurry temperature, dryer gas; and board QC such as set time, weight, hardness and paper bond.
- What you see first. A modelled minimum-safe water-to-stucco ratio for high-volume products, with constraint margin for flowability and set time visible on every recommendation.
- How it grows. After shadow-mode validation on one line and a few products, extend across the portfolio as metered dryer gas and QC outcomes support it.
Related for gypsum
Other gypsumstarting points
Mixer water ratio sits beside calciner consistency and dryer zone thermal optimisation on the same board line.
- 01Stucco Calcination ConsistencyEstimate stucco water demand from calciner and feed data so consistency is managed at the calciner, not only compensated at the mixer.
- 02Board Dryer Zone Thermal OptimizationRecommend dryer zone settings from gas, humidity and board moisture history to remove residual water with less fuel.
- 03Gypsum industryThe wider picture for calcination consistency, slurry water and board dryer energy.
Questions wallboard process teams ask us
Conservative water-to-stucco ratios keep slurry flowable but leave excess water for the dryer to evaporate. This use case recommends a safer floor for the current stucco and product without relaxing quality constraints.
Mixer water and stucco metering, admixture dosing, stucco lab results, slurry temperature, line speed, dryer gas consumption and board QC such as set time, weight, hardness and paper bond.
No. Mixer metering and stucco QC already exist as part of the wallboard recipe and quality process.
Not during the pilot. Integration is read-only decision support. Process engineers review and approve recommendations. Any later automation would need line-specific validation.
Board quality is treated as a constraint. Set time, weight, hardness and paper bond are monitored. Recommendations that breach validated limits are rejected.
Calcination consistency estimates stucco quality at the calciner. This use case works at the mixer and recommends gauging water. Narrower stucco spread creates headroom; the mixer advisor decides how much of that headroom to use.
Through OptiStudio as operational decision support for slurry water. Expert Services can support discovery, data linkage and shadow-mode validation against your own dryer gas and QC baseline.
Gypsum · Slurry & dryer energy
Pay gas to remove water you actually needed.
See what stucco, recipe and production history say about the lowest water-to-stucco ratio your line can safely run, and how much dryer load that could remove.