Up & Running articles
Up & Running articles
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Field Report - Press diaphragm causes work stoppage, a case study
A chronic press load/unload diaphragm rupturing problem crippled the operation of the press at a mill. Plate and diaphragm misalignment were only part of the problem. Further analysis pointed to nipping roll diameter changes and incorrect diaphragm specifications.
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Floor protection in recovery boilers with decanting floors
Optimizing both the floor protection methods and materials and the cooling, washing and cleaning practices can yield significant savings in mill outage time and corresponding increases in mill production and reduced risk of mechanical damage due to mechanical cleaning or hydro blasting during floor cleaning.
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Field Report - Yankee creping problems and regrinds, a case study
In this case study, creping problems on a Yankee correlated with frequent regrinds. Analysis by the OEM specialist discovered misalignment, and made procedural recommendations to resolve the problems.
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Field Report - Yankee dryer operation and maintenance
The Yankee dryer is one of the most essential parts of the tissue machine. This pressure vessel serves as a base for creping, pressing and drying of the paper sheet. Condition and performance of the Yankee should be monitored regularly.
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Field Report - Troubleshooting headbox corrosion, a case study
Imperfections in a headbox's finish interfere with fiber flow through its chambers, resulting in sheet uniformity problems and a poor end product. A process and condition test can identify problems caused by corrosion, fiber orientation and machine limitations.
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Using wood powder as fuel in lime kilns
A Valmet white paper discusses the use of wood powder as a replacement lime kiln fuel, as well as the factors that must be considered when evaluating using wood powder as kiln fuel and the lessons learned from operating with wood powder. Södra has contributed to this paper based on their experience at Södra Värö mill with a wood powder firing system that was installed in 2014.
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Field Report - Avoiding workplace injuries
Most workplace injuries (almost 60%) are the result of common, everyday missteps such as overexertion and slips/trips/falls - not from violent events, crashes or exposure to harmful substances.
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Field Report - Know your safety color codes
Color coding is a brilliant safety idea because workers can tell at a glance - almost without thinking - that they’re facing a hazard and how bad that hazard is.
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ServoNavitas - your toolbox for refiner segment technology
Refining is the key process when producing both mechanical pulp and fiberboard. Valmet continuously develops refiner segment technology to improve customer competitiveness. As a result of this development we present a new unidirectional segment concept called ServoNavitas.
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Field Report - Monitoring roll condition
Paper machine rolls require a wide variety of maintenance and repairs throughout their running lives. The most effective method for preventing and alleviating problems is to continuously monitor roll performance and conditions.