Abstract: The application of XRF portable analyzer in rapid analysis of the main element of ferroalloy has extended the application of this type of instrument to outside the mineral investigation field.The analysis method of ferrochromium and ferronickel samples is discussed and the mathematical model for using binary ratio technique to analyze dual samples is set up.The result shows that it is feasible to use the dual ratio technique to analyze the contents of alloy elements and of the main element Fe in ferrochromium and Ferronickel samples.

Key words: XRF portable analyzer, Content of main element Fe, Rapid determination