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nature : two between the electrode and the arc heating materials to a class of EAF. Divided into single-phase and three-phase two. More electrode materials used graphite rods. For the first two short electrode contacts must separate its forthcoming gap, producing powerful arc that the cathode to the anode of free electron emission, air ionization arc formation. To prevent the arc off, the regular circuit access choke. Arc maximum temperature of up to 4,000 ° C By heating methods can be divided into three types. (1) indirect heating furnace, arc formed between the electrodes to radiation heat transfer to the materials. (2) direct heating furnace, arc and the electrode materials forming. (3) Electric Arc Furnace resistance electrode inserted material from the arc current and thermal materials issued by the thermal heating of materials. -- Primers heaters warming fast, high temperatures, generally it may melt materials, regulate and control convenience, but power consumption, electrode wear and tear, more complex equipment. For high-temperature materials and the melting powder, but also for making a hollow ball and rockwool products, the high-temperature furnace.
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