§ Commissioning & Optimization

From first slurry to beyond nameplate — without the 18-month ramp.

A structured four-phase program for greenfield lines, brownfield restarts, and tired plants that never reached the capacity the OEM promised. We bring the chemistry, the instrumentation discipline, and three decades of pin-mixer hours. You keep the line.

First saleable board

≤ 72 h

from first wet end run

Time to nameplate

10–12 wk

vs industry 18–28 wk

Capacity unlocked

+8–18%

above commissioned nameplate

Kiln gas

–6 to –14%

GJ per t finished board

Edge waste

–30 to –50%

vs ramp-up baseline

Density CV

< 1.5%

across a 24 h roll

Fig. · Commissioning timeline

T-12 → ongoing optimization

§ The Four Phases

Phase 0

T-12 → T-2 weeks

Pre-Commissioning & Slurry Lab Setup

On-site stucco characterization (BHP, Vicat, free water, soluble salts), water hardness mapping, foam quality bench (Ross-Miles + drainage half-life), and a frozen Standard Operating Recipe (SOR) the line will start with. We commission the slurry QC lab in parallel with mechanical hand-over.

▸Stucco fingerprint (4 calciner sources, Δ purity, Δ BHP, Δ soluble Na/Mg/K)
▸Water profile vs retarder demand curve
▸Frozen SOR v0 + alarm bands for density / set / edge hardness
▸Trained slurry chemist + 2 line operators (NGL certification)

Phase 1

Day 0 → Day 14

First Slurry, First Board, Stable Roll

We sit at the pin-mixer with the start-up crew. Goal: first acceptable board within 72 h, continuous saleable roll within 14 days at 60–70% of nameplate line speed. The constraint at this stage is almost never chemistry — it is forming station geometry, knife clearance, kiln zone gradient, and edge hardness. We co-tune all four.

▸Pin-mixer commissioning protocol (RPM ladder, dwell, water staging)
▸Forming/edge calibration with live density + edge hardness logging
▸Kiln zone curve fitted to actual board (not vendor curve)
▸First-pass yield > 92%, paper bond > 90% fibre tear at 14 d

Phase 2

Week 3 → Week 12

Ramp to Nameplate Capacity

Speed climbs in 5–8 m/min steps. Each step is held until density CV < 1.5%, set time σ < 12 s, and kiln exit moisture < 0.7%. We rebalance retarder/accelerator pairs, re-tune foam draw vs target density, and shift dispersant dose as W/S drops. Patent-derived strategies (USG bimodal foam, Saint-Gobain edge densification) are introduced one variable at a time so the cause of every gain is traceable.

▸Line-speed ladder with locked recipe per step
▸W/S reduction roadmap (typ. 0.78 → 0.68, –12% kiln gas)
▸Foam system tuned to bimodal void distribution
▸100% of nameplate speed at saleable quality by week 10–12

Phase 3

Month 4 → ongoing

Optimization Beyond Nameplate

The interesting work. Most lines have 8–18% hidden capacity locked behind kiln gas, edge waste, or chemistry inertia. We instrument the bottleneck (almost always the kiln), then push board weight down, line speed up, or both — without losing flexural or nail-pull. Monthly review with the plant manager against a contractual KPI scorecard.

▸Board weight –4 to –9% at equal mechanical class
▸Kiln specific energy –6 to –14% (typ. 1.55 → 1.36 GJ/t board)
▸Edge trim waste –30 to –50%
▸Sustained OEE > 88% on a 24/7 schedule

§ The Ramp Curve We Target

Fig. · Ramp curve to nameplate

weeks vs % nameplate capacity

The industry-typical curve is what happens when chemistry, mechanical commissioning, and process control are tuned sequentially by three different vendors. We compress it by running them concurrently with one accountable team in the slurry lab.

§ Field-Tested Failure Modes

The four problems we are called in to fix more than any others. If you recognize one of these, the optimization program pays for itself inside a quarter.

Fig. · Failure-mode flows · field-tested

cause → intervention → outcome

§ Engagement Models

Greenfield

Full Commissioning

Phase 0 → Phase 3, 9–14 months on site. Resident slurry chemist plus rotating process specialists. KPI-tied milestone billing.

Brownfield

Capacity Unlock

90-day diagnostic + 6-month implementation. Target: +10% nameplate or –10% kiln gas, whichever the plant chooses. Success fee on verified gain.

Retainer

Continuous Optimization

Monthly slurry review, quarterly on-site trial, hotline access for shift incidents. Pairs with NGL chemistries supply contract.

§ Next step

Send us your stucco fingerprint and last 30 days of line data. We return a 12-page ramp diagnostic in 10 working days.

Request a diagnostic Open the Plant Toolkit