Paper360 - May/June 2017 - 35

The mill is energy self-sufficient and now
boasts usage of 95 percent bio-and recycled
fuels, maximizing energy efficiency and minimizing fossil CO2 emissions. It also produces
310,000 tpy of unbleached kraft pulp from
local, sustainably sourced and certified spruce
and pine.
Says Mill Director Jarkko Tehomaa,
"Varkaus was a wise place for a conversion to
containerboard, because an investment of EUR
110 million, 10 times less than a greenfield
mill, delivered a first class packaging facility. Our new board machine was designed to
balance perfectly with the existing integrated
pulp mill and power plant. Well located from
a raw material supply point of view, the necessary infrastructure and competence was
in place. We also gained a lot from the Stora
Enso Ostroleka (Poland) start-up team, who
recently completed a major start-up of new
test liner line."
On a practical and tactical note, Tehomaa
says, "The paper machine's existing trim width
was just right for the new end-products."
Tehomaa suggests that Varkaus benefits from
the Stora Enso global sales network, which is
now being enhanced in Europe and globally.
"Our team is close to end users who demand
strong containerboard that prints well. We are
part of image-making for fruit and vegetable
brands, as well as a range of industrial products. That's why our range of brown and white
top grades, light and heavy, are the right fit for
diverse local converting."
CORE SUPPLIERS
In addition to Stora Enso's own experts,
Pöyry engineering was instrumental in the
conversion, including machine and process

Team discussion at the dilution screen back layer.

Jukka Lyyra and AFT's Risto Nykanen observe Varkaus BM 3. The machine has a trim width of 7.8
meters, just like Stora Enso Ostroleka.

optimization from Valmet and Honeywell.
In total, about 70 suppliers were involved for
various specialization tasks.
Valmet handled construction and installation of the paper machine's new headbox and
shoe press and revamped the paper machine's
dry end. In addition, they supplied the mill
with a new quality control system.
Honeywell was in charge of modernizing
control, security, and management systems.
Everything in the paper mill runs from two
integrated control rooms. Only one control
room runs the pulp mill and power plant.
LESS IS BETTER FOR WET
END SYSTEMS
The compact system for approach flow
and screening from AFT first proved itself at
several other Stora Enso mills. According to

Jukka Lyyra, area manager, paper machine,
mill conversion project at Stora Enso, "We knew
we could count on AFT for their POM system,
screens, and cleaners. There was no need for the
traditional storage tanks and deculator, because
AFT's POM runs smoothly with much lower
water and energy usage. There's been no contaminant build-up. Less time for grade changes.
Less air to disrupt the paper machine headbox
process. Fewer defects and subsequent complaints from customers. We don't think about
it-AFT's POM is almost dull, it's so reliable!
That's the best kind of system in a board mill,
because there's always an issue somewhere."
In fact, Varkaus was the first Stora Enso mill
to install an early model of the POM system
back in 2001. "Some of the old-timers saw the
value of a minimalist approach. Now, POM has
been perfected, including easy monitoring in
our control room."
The AFT delivery includes a wet end system of two POMp degassers, a POMLock seal
water drop leg and cleaning for the top ply,
and a 3-stage back ply screening room combining three MaxFlow units in the primary
and coarse positions and a tertiary MaxSaver
screen to maximize fiber recovery.
"Because the wire section is a bit short, the
team had concerns about drainage capacity
and higher speed. That's why the two POMp730
degassers made sense for deaeration," says
Risto Nykanen, AFT project manager.
Adds Lyyra, " Just the right amount of degassing without the civil engineering, capital, and
running costs of a deculator was a wise move.
We have full functional capacity and the flexibility we need in a very compact space."
Paper360º MAY/JUNE 2017

35



Table of Contents for the Digital Edition of Paper360 - May/June 2017

Setpoint
Over the Wire
Leadership for a Changing Industry
An Ode to Small
The Graying of the Paper Industry
Suppliers Reach Out to Mill Leaders
Making a Difference: 2017 TAPPI/PIMA Awards
RISI’s Asian CEO of the Year
TAPPISAFE Offers Solid Benefits for Mills, Contractors
Reinventing Varkaus
Failure Isn’t Just an Option—It’s Unavoidable
Blower Technology Proves Its Worth
TAPPI Journal Summaries
Global Study: Most People Highly Value Paper and Print
The Changing World of OCC
TAPPI News
ASPI News
Index of Advertisers
Paper360 - May/June 2017 - intro
Paper360 - May/June 2017 - ebelly1
Paper360 - May/June 2017 - ebelly2
Paper360 - May/June 2017 - cover1
Paper360 - May/June 2017 - cover2
Paper360 - May/June 2017 - 3
Paper360 - May/June 2017 - 4
Paper360 - May/June 2017 - 5
Paper360 - May/June 2017 - Setpoint
Paper360 - May/June 2017 - 7
Paper360 - May/June 2017 - Over the Wire
Paper360 - May/June 2017 - 9
Paper360 - May/June 2017 - 10
Paper360 - May/June 2017 - 11
Paper360 - May/June 2017 - An Ode to Small
Paper360 - May/June 2017 - 13
Paper360 - May/June 2017 - 14
Paper360 - May/June 2017 - 15
Paper360 - May/June 2017 - The Graying of the Paper Industry
Paper360 - May/June 2017 - 17
Paper360 - May/June 2017 - Suppliers Reach Out to Mill Leaders
Paper360 - May/June 2017 - 19
Paper360 - May/June 2017 - Making a Difference: 2017 TAPPI/PIMA Awards
Paper360 - May/June 2017 - 21
Paper360 - May/June 2017 - 22
Paper360 - May/June 2017 - 23
Paper360 - May/June 2017 - 24
Paper360 - May/June 2017 - 25
Paper360 - May/June 2017 - 26
Paper360 - May/June 2017 - 27
Paper360 - May/June 2017 - RISI’s Asian CEO of the Year
Paper360 - May/June 2017 - 29
Paper360 - May/June 2017 - 30
Paper360 - May/June 2017 - 31
Paper360 - May/June 2017 - TAPPISAFE Offers Solid Benefits for Mills, Contractors
Paper360 - May/June 2017 - 33
Paper360 - May/June 2017 - Reinventing Varkaus
Paper360 - May/June 2017 - 35
Paper360 - May/June 2017 - Failure Isn’t Just an Option—It’s Unavoidable
Paper360 - May/June 2017 - 37
Paper360 - May/June 2017 - Blower Technology Proves Its Worth
Paper360 - May/June 2017 - 39
Paper360 - May/June 2017 - TAPPI Journal Summaries
Paper360 - May/June 2017 - 41
Paper360 - May/June 2017 - Global Study: Most People Highly Value Paper and Print
Paper360 - May/June 2017 - 43
Paper360 - May/June 2017 - 44
Paper360 - May/June 2017 - 45
Paper360 - May/June 2017 - The Changing World of OCC
Paper360 - May/June 2017 - 47
Paper360 - May/June 2017 - TAPPI News
Paper360 - May/June 2017 - ASPI News
Paper360 - May/June 2017 - Index of Advertisers
Paper360 - May/June 2017 - cover3
Paper360 - May/June 2017 - cover4
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