Characterization of limestone using synchrotron-based micro-tomography
| Reference number | |
| Coordinator | Umeå universitet - Institutionen för tillämpad fysik och elektronik |
| Funding from Vinnova | SEK 499 000 |
| Project duration | July 2019 - June 2021 |
| Status | Completed |
| Venture | Research infrastructure - utilisation and collaboration |
| Call | Industrial pilot projects for utilisation of neutron- and photon based techniques at large scale infrastructures - spring 2019 |
Purpose and goal
The project´s objective has been to evaluate and demonstrate the possibilities of applying synchrotron-based microtomography in relation to the production of quicklime and cement clinker. To achieve the goal, the processes´ most important raw material, limestone, has been studied at the radiation source at ALS, Berkeley.
Expected results and effects
The results show that synchrotron-based microtomography can be used to determine pore structure and pore size distribution, which affects the limestone´s behavior during high temperature refining. Furthermore, the method is suitable for the identification and distribution mapping of pyrite, a mineral that affects the product quality of the burnt lime. The method has been shown to have limitations when it comes to differentiating dolomite and calcite. In combination with other methods, the method is relevant for limestone intended for high-temperature processing.
Planned approach and implementation
The project has included three activities: 1) Selection and characterization of limestone material, which was carried out according to plan at the industry and at the university, 2) Sample preparation and tomographic examination at a synchrotron, which was carried out according to plan at ALS, Berkeley, however the project parties were not allowed to attend at ALS due to COVID-19 pandemic so the work has been performed by ALS own staff, and 3) Analysis of data, synthesis, compilation of data and final report, which to its extent was performed according to plan.