News - Količevo Karton d.o.o., (Mayr-Melnhof Group)



News - Količevo Karton d.o.o., (Mayr-Melnhof Group)

Količevo Karton d.o.o., (Mayr-Melnhof Group)

News - Količevo Karton d.o.o., (Mayr-Melnhof Group)

Newsgrafik #117525

Goals achieved with coater section rebuild in Mayr-Melnhof Kolicevo  (Company news)

With good planning, suitable equipment and professional personnel, good results are achieved as planned – even in challenging board machine rebuild projects.

Photo: Rok Sustar from MM Kolicevo (left) and Timo Nurmiainen from Valmet know the importance of pilot trials; they give the opportunity to test the papermaking process and coating chemistry

All the targets for the project were achieved. Runnability is better than before, and the efficiency is better, too,” says Rok Sustar, Technologist and Assistant to the Production Manager at Mayr-Melnhof Kolicevo mill in Slovenia. After more than a year, this positive atmosphere has not changed: the mill personnel are content with and confident about the improved coating section.

Before the rebuild, board machine BM 3 of Mayr-Melnhof Kolicevo Karton was facing challenges with runnability and efficiency. The coating section required improvements since the speed of the board machine was going to be increased and the existing coating technology was not suitable any longer. This resulted in the decision to rebuild the coating section.
Pilot trials before the decision

Before the rebuild decision was made, the coating concept, coating color chemistry, and performance were tested at the Paper Technology Center in Järvenpää, Finland. Rok Sustar is convinced that finding the correct solution is easier with the chance to run a pilot. The decision does not have to be based on assumptions and conjecture when there is concrete proof before your eyes. “You can see the benefits and witness the good runnability,” Rok Sustar says.

Professional project

With clear targets in mind, a multilayer curtain coater and a blade coater started up after a very short shutdown period in the summer of 2015. A supply system for the two layers of the curtain coater was also installed. Sustar explains that the Valmet personnel were really professional. He continues: “The installation went according to plan. It was a short installation time, and there was a lot to do – like building it and testing it with water – but everything went well. The compact size of the curtain coater was also a real advantage in the rebuild.”
“In ten minutes, it was working”

When everything is well planned, you are likely to get good results quickly. All the movements and hydraulics were tested at the workshop before the equipment was sent to the customer site. “In ten minutes, the board was saleable,” Sustar states.

The coating section has been easy to operate and more reliable since the rebuild. Curtain coating has a contactless coating application, which is good for runnability and reduces web breaks. “There is less second-rate board and fewer breaks at the coating section. Also, the day-to-day handling is a lot easier than before,” says Sustar.
High coating color quality with supply system

To achieve high coating color quality, curtain coating requires a completely airless coating. This sets high standards for the OptiSupply machine circulation and its degasser. “The degasser in the supply system is working very well. We always reach the pressure we want to,” says Sustar. The maintenance requirements are relatively moderate: “We clean the degassers every two months in the longer shutdowns. They’re quite easy to clean. It takes less than two hours to open them, clean them with high pressure water, and close them – this includes everything.” A short, automatic cleaning sequence is used during the briefer shut-downs.
Asking for better and better

The Kolicevo mill has noticed that their customers are ever more demanding for higher quality and lower prices. Continuous improvement must be a constant state of mind for each producer.

A cost-effective rebuild with fast results is the only alternative. Any shutdown is a direct loss of income for the board producer. For good results, you need the correct concept choice, good planning, and proper raw materials to achieve the desired targets. A rebuild is always a challenge, but the risks are minimized with a good and reliable partner. “Valmet personnel are really professional,” summarizes Sustar.
(Valmet Corporation)

Newsgrafik #114499

Modernisierung der Nasspartie im Werk Kolicevo  (Firmennews)

Erfolgreicher Umbau der kleineren Kartonmaschine 2 (KM2) im slowenischen MMK Werk Kolicevo – Produktqualität, Produktivität und Umwelt profitieren.

Gesteigerter Wirkungsgrad KM2
Im März 2016 wurde der Umbau der Nasspartie der KM2 in eine state-of-the-art 3-Lagen-Langsiebmaschine erfolgreich und planmäßig abgeschlossen. Ergänzende Investitionen betrafen die Modernisierung der Vakuumsysteme und mehrere Antriebe, die eine höhere Geschwindigkeit und somit eine gesteigerte Produktivität der KM2 ermöglichen und auch energieeffizienter arbeiten.

Versorgungssicherheit durch Vorproduktion
Durch die vorausschauende Vorproduktion nachgefragter Standardqualitäten konnte in der Umbauphase die nahtlose Kartonversorgung der Kunden selbstverständlich wie gewohnt garantiert werden. Dank der exzellenten Planung wurde nach einem nur zweiwöchigen Stillstand der Vollbetrieb wieder aufgenommen.

Höhere Produktqualität und erweitertes Sortiment
Am wichtigsten jedoch: Das Ergebnis zeigt sich überzeugend in neuen, starken Kartonqualitäten sowie einer konstant gleichmäßigen, stabilen Oberfläche und einem optimierten Steifigkeitsverhältnis (längs / quer) bei den bestehenden Qualitäten. So besticht etwa unsere, bei Pharma- und Hygieneprodukten geschätzte, GT2 Kartonqualität Belpak™ mehr denn je durch ausgezeichnete Steifigkeitswerte. Bei gleicher Grammatur und Dicke überzeugt Belpak™ nun durch eine 5-10 % höhere Stabilität.

Durch den Umbau wird das Werk Kolicevo auf den modernsten technologischen Stand gebracht und weiß durch Qualität auch weiterhin überzeugen.
(Kolicevo Karton d.o.o.)

Newsgrafik #111990

Valmet started up new coaters at Mayr-Melnhof Kolicevo board machine in Slovenia  (Company news)

Valmet has successfully started up new coating technology, featuring multilayer curtain coating, at Mayr-Melnhof Kolicevo board machine 3 (BM 3) in Slovenia. Valmet's delivery included a new OptiCoat Layer curtain coater with supply system and a new OptiCoat blade coater.

Compared to other curtain coating solutions OptiCoat Layer is compact in size and straightforward to install. This enables lower investment cost and shorter shut-down time. The start-up was very smooth, thanks to the pre-assembly and pre-testing. This and the good cooperation between Valmet and experienced Kolicevo mill resulted in high-quality production right after the start-up.

"The assembly was finished on time and the start-up was done by just pushing the button. We are happy that the high targets set for this project have been met. The cooperation with Valmet was very good, on an open base during the whole project and startup phase, preventing all possible disturbances, before they even could occur," says Technical Mill Manager Rado Kunavar from Mayr-Melnhof Kolicevo.

Benefits with curtain coating
Mayr-Melnhof has been using curtain coaters from different suppliers for several years. Due to the compact design of Valmet's coater, the coating trials performed in Järvenpää and the good cooperation during the sales phase, they decided to choose Valmet this time. The selected coating concept including the 2-layer curtain coating makes it possible to reduce coat weight resulting in cost savings.

OptiCoat Layer uses slide dye curtain coating, which enables versatile use of coating color substances and layer thicknesses. The method also provides flawless coating coverage. The supply system includes the necessary degassing equipment. Effective degassing is essential in curtain coating since even the smallest air bubbles affect the stability of the curtain.

"2-layer coating has been tested with dry edges, and equipment works as expected. It has proven to be very good that we chose the degassing system from Valmet. We are very pleased with it," says Production Manager Aljaz Hafner at Mayr-Melnhof Kolicevo.
(Valmet Corporation)