World first. Again.

Smurfit Kappa Nettingsdorf has been something of a trailblazer through the years. It was one of the first paper mills ever to use a shoe press and one of the first to try out “continuous batch” pulp cooking. And now, they have another world first to report …

Because it is now the only mill in the world with batch pulp cooking that also uses recycled secondary steam for woodchip pre-steaming. It also marks a major expansion by ANDRITZ in the world of batch cooking.


Smurfit Kappa wanted to lower the mill’s environmental impact by reducing consumption of steam, as well as improving pulp yield. But part of it was simply that Nettingsdorfer’s ethos is to be innovating all the time (remember the shoe press?). Pulp Mill Manager, Gunter Leitgeb, explains that “Continuous improvement is in our DNA. We all have to find new ideas and implement them. We get measured on it.”

This was good news for ANDRITZ. Paavo Tolonen, Fiberline Director, ANDRITZ Pulp & Paper Services, says, “We are really convinced that this technology will work everywhere. But we needed to try it out in the real environment. It was important for us to find customers willing to share the risks in doing something new.” Leitgeb explains, “ANDRITZ did everything to make us feel comfortable, with studies and guarantees. It helped us to do something new.”

Left to right: Paavo Tolonen, Director Fiberline, ANDRITZ; Günter Leitgeb, Pulp Mill Manager, Smurfit Kappa Nettingsdorf; Robert Petroschinsky, Mechanical Design and Construction Engineer, Smurfit Kappa Nettingsdorf; Helmut Adlboller, Assistant Pulp Mill, Smurfit Kappa Nettingsdorf and Mia Rantasalo,  Project Manager, ANDRITZ


And this really is something new.

The “continuous batch” system at Nettingsdorfer is basically batch pulp cooking, but with continuous liquor circulation, via a highly-developed system of interdependent tanks. Leitgeb says that before the recent upgrade with ANDRITZ, “our heat recovery system was already very good, near the world’s best. But we still had waste energy. We still had to cool our liquid emissions with cold water.” And on the quality front, the firm wanted to reduce the shives and the amount of uncooked chips by enhancing impregnation, which leads to improved pulp strength, a key selling point for kraftliner. The project also made it possible to compact the chips more, enabling the mill to increase chip density in the digester by 10% and creating flexibility for process optimizations. In short, the goals were to raise pulp quality and yield, while reducing energy consumption, and thereby cost and environmental impact. All while improving safety. Tolonen summarized, “In general, batch cooking has better flexibility with pulp quality and wood furnish, but worse energy consumption. The idea here was to combine (the best of) both.”


“ANDRITZ did everything to make us feel comfortable, with studies and guarantees. It helped us to do something new.”

Pulp Mill Manager
Smurfit Kappa Nettingsdorf


Tolonen also argues that this project reveals huge potential for other batch pulp mills. “A lot of batch mills have no secondary heat recovery or chip presteaming. And there has been little development of the digester screens for decades. We have developed continuous pulping technology for batch pulping.” He argues that although ANDRITZ is a relatively new entrant into the batch pulping space, it has “huge knowledge and decades of experience that we can bring to batch cooking.”

Leitgeb continues, “I would definitely suggest doing an audit with ANDRITZ, because they look for something new, not just safe. They go digging. They put their experience together with the mill and they are very advanced, with a lot of knowledge and experience. He concludes, “If you have liquids that can flash, then definitely go for it. You get benefits in safety, environment, quality, production, availability, and raw material savings. I can’t see a negative.”


“We are really convinced that this technology will work everywhere.”

Director, Fiberline

Black liquor is flashed in new ANDRITZ efficient flash tank utilizing FlashLance™-technology.

Modified Help™ discharge with center steaming provides excellent impregnation result.

Vapor reboiler generates fresh steam utilizing the energy of hot black liquor (Flash steam) and fractionates the flash steam condensate to turpentine rich and clean condensates.

Laos - Empire of the sun

Sun Paper Holding Laos started up its 300,000 t/a greenfield pulp mill near the small town of Xepon, Savannakhet Province, Laos, last year after just 20 months from the signing of supplier contracts. ANDRITZ was chosen to supply various key technologies for the project.

Read more

Holmen Hallsta: It’s all about customer satisfaction

When integrated Swedish mill Holmen Paper Hallsta wanted to further enhance its book paper production process, it called on ANDRITZ to carry out a rather unique project of utilizing two second-hand twin wire presses, and an existing, pre-used screw press to increase capacity and improve pulp quality for its PM 12.

Read more

Market Trends: PULP TRENDS

“The good times are returning” according to Oliver Lansdell, Director, Hawkins Wright, provider of market intelligence and analytical services to the international pulp, paper, and biomass industries. And it seems the pulp industry, in particular, is enjoying something of a renaissance. There are various reasons for this optimism, including increasing demand for virgin fiber content in tissue and hygiene products, the exciting growth of renewable packaging, and strong demand in niche applications such as wood-based textile fibers and other new markets in the bioeconomy.

Read more

HELIOS shines bright at SCA Östrand

The largest engineering project northern Sweden has ever seen was completed recently with the doubling of capacity at SCA Östrand’s softwood kraft pulp mill. The project – named Helios after the God of the Sun in Greek mythology – is now setting a new global benchmark in high-performance pulp production. ANDRITZ supplied some of the latest key technology to the completely rebuilt mill.

Read more
Contact us