Model for Predicting the Concentration of Phosphorus Removed as Impurity during HydroProcessing of Iron Oxide Ore Designated for Production of Orthopedics Devices . C. I. Nwoye. 1*, I. E. Mbuka1, M. Obi2 and K. Okeke3 1. Department of Materials and Metallurgical Engineering Federal University of Technology, Owerri, Imo State. 2