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On-line chemical analysis of pulp and calcination processes

Reference number
Coordinator RISE Acreo AB - Rise Acreo AB, Kista
Funding from Vinnova SEK 399 985
Project duration October 2017 - March 2018
Status Completed
Venture Strategic innovation programme for process industrial IT and automation – PiiA
Call 2016-05369-en

Purpose and goal

The purpose of this feasibility study was to, through lab and field tests, investigate the possibilities of the LIBS-technique to continuously detect undesirable metal elements in two mass processes (dissolving pulp and lime mud). Further, the usability and benefit of the LIBS-technique for the two processes were investigated. A plan for a coming RoD-project was written that aims toward an industrial implementation of the LIBS-technique.

Expected results and effects

The LIBS-technique was able to detect the undesired elements in the material in the processes. As the number of samples were few, the accuracy in element quantity could not be estimated. Nevertheless, the conclusion is that the LIBS-technique can be used for on-line detection of undesirable elements in dissolving mass and mesa and provide information to control the production process. This process control will open possibilities for improved quality and a more stable process with less downtime.

Planned approach and implementation

Initially the quantities of the different undesirable elements were compiled for the two processes (dissolving pulp and mesa). Then lab measurements were made on collected samples from the two processes, and field measurements were made on the lime mud filter at Mörrums Bruk. The usability and benefit of the LIBS-technique were analysed and summarized. Finally, a plan for a coming RoD-project was written.

The project description has been provided by the project members themselves and the text has not been looked at by our editors.

Last updated 25 November 2019

Reference number 2017-03237

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