Videreutvikling av prosess- og produktkontroll i prilleindustrien

Offentlig prosjektsammendrag

Prilling compound fertilizer (NPK) has been a part of Yara since the introduction of the nitrophosphate process in the 1920’s. Currently, there are two main plants in Porsgrunn, producing nearly 2.5 million tonnes of NPK yearly. A bottleneck of compound fertilizer production is the prilling, the solidification of nitrophosphate melt into spherical droplets. Due to the large number of different raw materials and product grades, it is difficult to pinpoint exactly where the problems occur. This project aims at connecting raw material-, product-, and process parameters together in order to increase throughput, quality and process control. It also aims to reduce emissions by assessing cleaning a localized air-stream with a higher concentration of pollutants, rather than cleaning the entire airflow going through the tower.