P-refining of MeOH sludge To produce synthetic fluorspar and to recover phosphorus
| Reference number | |
| Coordinator | Kungliga Tekniska Högskolan - Kungliga Tekniska Högskolan Inst f materialvetenskap |
| Funding from Vinnova | SEK 3 424 396 |
| Project duration | October 2023 - October 2026 |
| Status | Ongoing |
| Venture | Circular and biobased economy |
| Call | Increased resource efficiency, industry funding to a circular economy |
Purpose and goal
The overall objective of the project is to attain the development of technically feasible and commercially and environmentally sustainable synthetic fluorspar from phosphorus-containing metal hydroxide sludge for application in the metallurgical and phosphorus industries of high quality and economically viable for broader applications in other industries, such as mineral fertilizer.
Expected effects and result
This project responds to Sustainable Development Goals 9.4, 12.4 and 15.2. Pickling bath neutralization sludge is a residual waste that can be reduced by valorization as synthetic CaF2 and the P removed can be used as a mineral fertilizer. Providing an outlet for metal hydroxide sludge through the application of more sustainable technologies would benefit both the steel making and forestry industries.
Planned approach and implementation
KTH is the project coordinator and contributes to all 5 work packages. Alleima provides MeOH sludge samples and expertise in the use of synthetic CaF2 in metallurgy and contributes to the economic analysis (3-4). Fortum provides expertise in P removal from MeOH sludge and process scale-up (1-3). Sveaskog contributes with their expertise regarding P requirements as a fertilizer in the forest industry. All partners will actively contribute to the management and dissemination of the project (5).