Abstract: The scientific “combination of the four same kinds” and subject implementation plans were worked out in the light of production characteristics and present distribution of enterprises in ferrous metal mining and separating industry.Through collection of the historical measured data and field measurement data on 114 enterprises in China′s ferrous metals mining and separating industry，analysis and calculation of the test data as well as the reliability demonstration，a large number of pollutant generation and discharge coefficients were obtained.The total number of the original historical coefficients was 879; the total number of the calculated individual emission coefficients was 303.Meanwhile the determination of the pollutant generation and discharge coefficients in China′s black metal mining and separating industry plays an important role for the guidance of the first census of industrial pollution in China.

Key words: Ferrous metal mining and separating industry, Coefficient of the pollutant generation and discharge, Combination of the four same kinds, Field measurement