WOOD PROCESSING INDUSTRY NEWS
Boosting chip capacity without increasing the capital budget
mill produces 460,000 t/a of softwood, hardwood and dissolving pulps. Raw materials are pine, spruce and birch. The site was originally home to a sawmill, which was purchased from the Soviet Union by Enso-Gutzeit in 1955. A pulp mill was started up at the site in 1967 and, in 1992, a project to build a new fibreline, sawmill, planing mill and modern waste water biological treatment plant created Enocell. In 2009, the mill was closed for six months due to the poor economic situation. In 2012, Stora Enso converted one of the two batch fibrelines to the production of dissolving pulp, proving that the mill is capable of adapting to market conditions with great flexibility and resiliency. However, as production ramped up, Enocell developed a problem in its woodyard. As
L
ocated in Eastern Finland, not far from the Russian border, Stora Enso’s Enocell
part of the 1992 project, two Andritz debarking, chipping and screening lines were installed. Some of the equipment in these lines had been updated and some is original. One of the original pieces was the CS-800
chip screen on Line 2. The Andritz CS-800 is a gyratory screen, consisting of a screen frame with three screening decks. The screen frame is suspended by four steel cables. The screen is simple to
operate and considered to be a rugged piece of equipment. There is an electric drive with a single shaft with counterweights in the middle. This gives the screen its freely vibrating horizontal circular motion to
Chipping and grinding in the forest
A highly competitive market for wood chips is driving innovation and several new cost-reduction solutions were presented at SkogsElmia, including a grinder from CBI in the United States. The Magnum Force 5400 Multiflex is designed for use in the forest and everything is mounted on a truck trailer. The crane is mounted on the truck itself. “It’s American strength combined with European trailer expertise,” said the company’s founder, Swede Anders Ragnarsson. The innovation solves a common problem experienced when a grinder is driven on to a forest road and the material to be ground is heaped on both
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sides of the track. To feed it in from both sides, the entire unit has to be turned around. This takes time and reduces efficiency. What CBI has done is to build
a complete unit on the trailer with the ability to rotate both the infeed and radial discharge in both directions. The trailer can stay in one place and grind all
the material in one operation. Because the radial discharge can also rotate, it is easier to fill several containers one after the other. Power comes from a 765 hp engine, giving a capacity of up to 140 tonnes per hour. “The rear wheels of the trailer can also be moved by remote control, which reduces the turning radius and makes it easier to drive the entire rig in the forest,” added Ragnarsson. The unit is built to be driven on public roads in conformity with European regulations.
It measures 2.55 metres wide and 4.00 metres high. More information from
www.cbi-inc.com
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