中频感应炉的发展得益于静力变频器的使用，这种变频器和磁力变频器比较，其效率高达95%～98%。作为感应炉使用的变频器额定功率不断提高，近来，9 000 kW变频器已投产，把它联接在容量为12 t的炉子上，熔化铁液的生产率可达18 t/h；将中频感应炉功率密度每吨熔化能力提高到1 000 kW，能使熔化期缩短到35 min。感应炉的熔化率是随炉子的容量变化而变化，一般中频感应炉熔化铸铁的熔化率为0.4～35 t/h。 The development of the medium frequency induction furnace thanks to the use of static frequency converter, the inverter and magnetic force transducer, its efficiency is as high as 95% ~ 98%. As used in the converter power rating of induction furnace, recently, have been put into operation in September 000 kW inverter, join it in capacity of 12 t on the stove, the productivity of molten iron liquid can reach 18 t/h; Will power density per tonne of medium frequency induction furnace melting capacity up to 000 kW, can make the melting period reduced to 35 min. Induction furnace melting rate is changing along with the capacity of the furnace, the general medium frequency induction furnace melting cast iron melting rate is 0.4 ~ 35 t/h. 例如，使用2 t容量的炉子，可得到2～2.38 t/h的熔化率，使用12 t的炉子则可达到18～21 t/h的熔化率；而采用工频感应炉熔化冷料的熔化率，1.5 t炉为0.75 t/h、3 t炉为1.5 t/h、5 t炉为2.5 t/h，10 t炉只有4 t/h。可见中频感应炉的熔化率远远超过了工频感应炉，这就为在选择铸铁生产熔炼设备时可以以小代大，使用较小容量的中频感应炉代替较大容量的工频感应炉创造条件，中频炉取代工频炉既减少了用地，又降低了投资，也保证了铁液的连续供应，对于连续作业、生产能力较大的铸铁生产均十分有利。将中频感应炉用于连续铸造或离心铸造球墨铸铁管生产的铁液熔炼，用它取代冲天炉，或与高炉、冲天炉进行双联，其生产能力将可得到充分发挥。例如，国内有1个离心球墨铸铁管生产厂家，就是采用了 10 t中频感应炉与高炉双联工艺，对铁液进行升温和调整成分，将贮存的高炉铁液从1300 ℃升温到1520 ℃，大约需要27 min。该炉频率100～200 Hz，功率为2 500 kW。 Use 2 t capacity of the furnace, for example, can be 2 ~ 2.38 t/h melting rate, use the 12 t furnace can reach 18 ~ 21 t/h melting rate; With power frequency induction furnace melting slag melting rate, 1.5 t furnace is 0.75 t/h, 3 t furnace is 1.5 t/h, 5 t furnace is 2.5 t/h, 10 t furnace only 4 t/h. Visible medium frequency induction furnace melting rate is more than the power frequency induction furnace, it's for when choosing cast iron smelting equipment to small generation, using a smaller capacity of intermediate frequency induction furnace instead of large capacity of power frequency induction furnace to create conditions, medium frequency furnace instead of power frequency furnace is reduced the land, and reduce the investment, and ensures the continuous supply of iron liquid, continuous operation, the production capacity of large cast iron production are very favorable. The intermediate frequency induction furnace used for continuous casting or centrifugal cast ductile iron pipe production of iron smelting, use it to replace the cupola, or double with blast furnace, cupola, its production capacity will be available to give full play to. , for example, have a centrifugal ductile iron pipe manufacturers, is to use a 10 t medium frequency induction furnace and blast furnace duplex process, increasing the heat and adjust the composition of iron liquid, liquid storage of a blast furnace iron from 1300 ℃ temperature to 1520 ℃, it will take about 27 min. Whereas 100 ~ 200 Hz frequency, power of 500 kW. 中频感应炉电效率和热效率高，不但提高了熔化率、缩短了熔化时间，其单位电耗也相应降低。与工频感应炉相比，其电耗可从700 kW.h/t降低到515～580 kW.h/t。有关资料表明，在考虑炉渣的熔化和过热所需能量损失的情况下，中频感应炉冷启动时，单位电耗约582 kW.t/h，热炉操作时，单位电耗为505～545 kW.h/t，如果连续加料操作，则单位电耗仅为494 kW.h/t。 Intermediate frequency induction electric furnace efficiency and high thermal efficiency, not only increased the fusion rate, shorten the melting time, the unit power consumption is reduced. Compared with the power frequency induction furnace, its power consumption can be from 700 kW/h t reduce to 515 ~ 580 kW. The h/t. Relevant data show that in consideration of slag melting under the condition of the energy loss and overheating, medium frequency induction furnace cold start, the unit power consumption is about 582 kW. T/h, hot furnace operation, the unit power consumption is 505 ~ 545 kW. H/t, if continuous feeding operation, the unit power consumption is 494 kW. The only h/t.