Kemi
Simulation guarantees quality Efficient, steady and sustainable pulp production, providing premium pulp for a range of customer needs, is a key element of Metsä Fibre’s bioproduct mill concept. Matti Toivonen , SVP, Technology at Metsä Fibre, points to Kemi’s goal to use the best available technque to produce better pulp with improved quality consistency. The data collected from the production process and its use play an im- portant role in production efficiency and product quality. “We collect data throughout the production process, starting at the woodyard. We then use this data to anticipate potential disturbances and further improve the reliability of mill operations. This helps us guarantee the premium quality of products,” he says. A variety of modelling tools is used to assist the simulation of produc- tion processes, the optimisation of water consumption, the running of various alternatives and the assessment of their impact on the quality of end products. Development work will continue in Kemi after the mill’s start-up in ac- cordance with the principles of continuous improvement. “We will tweak new processes and fix any defects observed. The mill’s good performance is a combination of advanced technique and the em- ployees’ expertise and competence,” says Kittilä.
“In practice, around half the sulphuric acid required by the mill will be produced from the mill’s own odorous gases. The production of sulphuric acid is a major step towards a more closed chemicals cycle,” says Kittilä. The mill’s own sulphuric acid plant will reduce the volume of purchased chemicals. “The gasification of wood bark and production of sulphuric acid are good examples of technique that is more advanced than BAT require- ments. The wastewater treatment plant at the integrated mill will also achieve emissions levels lower than those in BAT requirements.”
World-class technique is used to minimise the environmental impact of operations.
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