- Complete pulp mills
- Chemical pulping
- Wood handling
-
Cooking and fiber line
- Cooking
- Screening
- Washing
- Oxygen delignification
- Bleaching
- Services for cooking and fiberline
- Pulp drying
-
Chemical recovery
- Evaporators
- Recovery boilers
- White liquor plant
- Process support and optimization
- Rebuilds and upgrades
- Heat and power production
- Services for chemical recovery
- Air emission control
- Other value-adding processes
- Dissolving pulping
-
Mechanical pulping
- Chip washing
- Chip treatment
- Refining and grinding
- Steam separation
- Washing
- Bleaching
- Screening and cleaning
- Services for Mechanical pulping
- Recycled fiber
-
Automation for pulp
- Analyzers and measurements
-
APC Advanced Process Controls
- Valmet WinGEMS
- Valmet Debarking Optimizer
- Valmet Batch Cooking Optimizer
- Valmet Continuous Cooking Optimizer
- Valmet Washing Line Optimizer
- Valmet Oxygen Stage Optimizer
- Valmet Bleaching Optimizer
- Valmet Evaporation Optimizer
- Valmet Recovery Boiler Optimizer
- Valmet Recovery Boiler Leak Detector
- Valmet Recovery Boiler Sootblowing Optimizer
- Valmet Causticizing Optimizer
- Valmet Lime Kiln Optimizer
- Valmet Recovery Line Management
-
AQC Advanced Quality Controls
- TMP Predictive Quality Controller
- TMP Specific Energy Optimizer
- Paper Machine Blend Controller
- Paper Brightness Optimizer
- Power Contract Optimization
- Paper Quality Software Sensors
- Paper Quality Real Time Optimizer
- Sensor Validation
- IMonitor Performance Monitor
- Ponderosa Pulp Quality Software Sensors
- IMAS Process Control Data Server
- Mill information management
- Distributed control systems
- Quality management
- Boiler Diagnostics Systems
- Services for pulp
- Fiber Technology Center
- Pulp
- Mechanical pulping
- Screening and cleaning
Screening and cleaning
The pulp is screened at high consistency using screen baskets with narrow slots.
High pulp consistency minimizes white water usage and provides a low passing velocity through the slots, which optimizes screening efficiency. Shives and sand that do not pass the narrow slots, the rejects, are sent to the unrefined rejects chest for further treatment in the reject refiner. The accepted fibers from the screens are taken to thickening at the disc filter.
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