Pulp Paper & Logistics
INDUSTRY NEWS 17 VALMET
the rebuild refining process is now more flexible with quicker response, though. Visualizing the process allows equipment operation and the process to be more easily monitored. The time it takes to change the grades (between kraftliner and fluting) has been considerably reduced, which is extremely important for BM2. The capacity of the refining system has also increased significantly.”
Raw material savings The achieved refining resulting from the physical and mechanical properties of the finished product are promising. The main strength parameters, such as burst strength and compression strength, are showing increases. “This has provided us an opportunity to carry out tests with a higher proportion of semi-cellulose in the kraftliner and fluting furnish and reach good quality values for end product with lower cost furnish,” Tufanov explains, who also mentions that the opportunity to change the refining degree range without damaging the fibre has considerably increased since the installation of the new refiners.
“Valmet’s solution was
inviting because of Valmet’s proven track record in energy efficiency. We also felt that new refiners would give us better control over the refining process and improve the quality of the final product. The innovative refining principle was a factor as well.”
Increased production flexibility During the upgrade of the stock preparation system, BM1, which produces kraftliner at a maximum speed of 730 m/min, received four OptiFiner Pro refiners for refining unbleached softwood kraft pulp. BM2 produces fluting and uniliner at a maximum speed
of 550 m/min, and received four OptiFiner Pro refiners for refining both softwood and also a mixture of soft- and hardwood as well as new slot screening equipment for base ply stock. “Basically, the stock
preparation process for BM1 and BM2 has not changed,” says Tufanov. “The control of
Up to 20% energy savings Board production director Dmitriy Hrapach explains the importance of further cost savings in the form of less refining energy, as their aim is sustainable and efficient production. “The new equipment met all our expectations,” says Hrapach. “We achieved the target values for both energy efficiency and the quality of furnish components. The reduced power consumption in refining is considerable. For BM1, we 4
July/August 2016
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36