The statistics data of charging structure as well as scrap

hot metal and electric pawer consumption per ton steel of two batches 1249 heats of a 50t arc furnace at Shijiazhuang Iron and Steel have been analyzed by using Statistics Package for Social Science (SPSS) software and iron-steel ratio to describe binary charging structure. The results showed that with charging iron-steel ratio increasing the electric power consumption per ton steel decreased. And the quantity relation between specific electric power consumption per ton steel (SEC)and iron-steel proportion (ISP)for two batches was obtained by curve regressive method

that is SEC= 402 e

-0.59ISP

for first batch and SEC= 327 e

-0.49ISP

for second batch

as iron-steel proprotein increased from 0.56 to 1. 11

the electric pawer consumption per ton steel decreased by 53 kWh/t.