Abstract: Ultrafine slag powder exhibits superior reactivity and is a critical component in concrete preparation. To meet the production requirements of TRMS 45.2 vertical roller mill slag grinding ultrafine slag powder, a technical transformation was implemented. This paper introduces the grinding process and main equipment configuration of the TRMS 45.2 slag vertical roller mill. During the transformation, high-efficiency cage rotors and an innovative static blade structure were adopted. The grinding area adjustments included modifying the liner plate angle, roller sleeve angle, roller sleeve corner radius, retaining ring height, and air ring area. Issues such as significant mill vibration, poor production stability, and non-compliant specific surface area of finished products encountered during production and commissioning were analyzed. Additionally, the influence of operational parameters including mill roller working pressure, powder separator speed, mill vibration, material layer thickness, mill air temperature, and mill air volume on production performance and parameter determination was evaluated. By optimizing the production process parameters, system power consumption was reduced to approximately 64kW·h/t, achieving transformation goals of producing 60t/h of ultrafine slag powder with a specific surface area of at least 600m2/kg and ensuring stable production operations.
