Fjerning av kadmium fra gjødselprosessen

Offentlig prosjektsammendrag

Cadmium (Cd), a hazardous heavy metal, is present in various amounts in some phosphate rock (P-rock) sources. Phosphate rocks are used as raw material in the production of mineral fertilizer in Yara’s plants in Porsgrunn and Glomfjord. Due to the potential of cadmium ending up in the food chain when utilizing P-rock high in Cd, EU has implemented a limit on Cd content in phosphate fertilizer. Due to availability of P-rocks it is important for Yara to be flexible on raw materials. As such, development of a technology that extracts Cd from the process stream is imperative. In this project a Cd-removal concept for the plant in Glomfjord will be developed. This will allow Yara to use different types of P-rock and then in the future being able to utilize different sources of phosphate.