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The Noak Technology Award 2015 to Jan Stener, Mineral Processing

Published: 23 November 2015

The Norrbotten Academy Technology Award has since 1996 been distributed to students at Luleå University of Technology for outstanding studies in the technical and natural sciences on basic, advanced or for special reasons postgraduate level. The prize is SEK 10 000.

Jan Stener uses in his research ultrasound technology normally used in areas like navigation or in healthcare to improve LKAB processes for separation of iron ore from other materials.

– It feels great to get the price for my research from the Norrbotten Academy. After living nearly 10 years in Norrbotten, it feels like home and I will be happy to stay here after my PhD studies. The money will come in handy; it becomes a shirt for the upcoming public dissertation, says Jan Stener, PhD student in Mineral Processing at Luleå University of Technology.

Technology Prize - Justification

Jan Stener is working at Luleå University of Technology with the project Wet Low Intensity Magnetic Separation - Measurements and Models sponsored by the Hjalmar Lundbohm Research Centre. He has developed methods for using ultrasound to "see" into opaque mineral suspensions with up to 9 vol% solids and with a penetration depth of up to 50 mm. It is then possible to determine velocity profiles and density variations in the pulp. Measurements have been made in progressively more complex environments; in an ideal flow cell, in a laboratory scale wet magnetic separator, and finally in pilot scale at LKAB. The results show that the measurement technique works.

Investigations in these thick suspensions, at varying ultrasonic frequencies, and with the achieved measurement depth are not published before. The measurement technique has attracted interest from the industry since it is generally applicable for measuring in narrow channels, where it is only possible to access the equipment from one side. It is also possible to use the technology as an overload sensor in the wet low-intensity magnetic separators.