The previous experiment of flotation conditions was carried out by use of orthogonal experimental method for the mineral processing production of 2004 year in Fengshan Copper Mine. Through the comprehensive analyses and comparison of experimental results, a fairly good flotation technology was fount out. Based on flotation technology, the good technical and economical indexes of mineral processing were achieved in the proving experiment and the practice in the first half of 2004 year, that copper recovery reached 90.54% and grade of copper concentrate reached 26.65%, all were markedly increased comparing with the past years.