1.新型节能风机的推广当前我国金属矿山采矿电耗约为10×10~9KWh,其中用于通风约3×10~9KWh。30多年来,大部分矿山一直采用70B_2主扇和JF系列局扇。由于我国金属矿山通风网路阻力较低需风量大,这些风机性能不能与大部分的通风网路相匹配,平均运行效率只有30～40％,每年浪费大量电能。如果把风机的效率提高到70％左右,一年可节电1～1.5× 1. The promotion of new energy-saving fan At present, China’s metal mine mining power consumption is about 10 × 10 ~ 9KWh, of which about 3 × 10 ~ 9KWh for ventilation. For more than 30 years, most of the mines have been using 70B_2 main fans and JF series fans. Due to the low air flow resistance of metal mine ventilation network in our country, the performance of these fans can not be matched with most of the ventilation networks, and the average operating efficiency is only 30-40%, which istes a lot of electric energy every year. If the efficiency of the fan increased to about 70% a year can save 1 ~ 1.5 ×