1.1 Equipment model: Three phase steelmaking electric arc furnace;
1.2 Equipment purpose: According to the user's process, it is used in conjunction with AOD furnace to provide initial molten steel, which can be used for the smelting of alloy steel;
1.3 Process flow:
Feeding → Closing and energizing → Arc piercing through the well → Main melting (oxygen assisted melting) → (temperature measurement and sampling) Melting and refining → (temperature measurement) Steel tapping → Furnace repair → Next process
1.4 Production Capacity:
One time feeding, steel output of 8t, main melting time (clear) under oxygen blowing ≤ 45min, power transmission time (1600 ℃) ≤ 50min, and cycle time ＜ 75 min.
Energy consumption index: maximum energy consumption limit (kW • h/t molten metal) ＜ 660
1.5 Factory related parameters and energy medium conditions:
1.5.1 Power supply conditions:
a. AC 10kV power supply system
Voltage: 10kV ± 10% Phase: 3 Frequency: 50±0.5Hz
Working principle:
Its work is based on a three-phase AC power supply, which transmits electrical energy to the electrode system through a specific power supply system. Electrodes are usually carefully made of carbon materials or graphite, responsible for connecting current and maintaining a stable state of the arc, while the electrode support system ensures that the electrode is firmly in place. In the arc zone, driven by a three-phase power supply, an arc is formed between the electrode and the furnace material to be melted inside the furnace. This arc is essentially a high-temperature plasma with extremely high energy, which can quickly heat the metal charge above its melting point, causing it to melt and complete subsequent metallurgical reactions. At the same time, by precisely adjusting the lifting and lowering of the electrodes, the length of the arc can be flexibly adjusted, thereby effectively controlling the amount and distribution of heat input into the furnace.
b. Low voltage distribution system
Voltage 380V/220V+10% frequency 50Hz three-phase five wire system computer connected separately
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Three Phase Steelmaking Electric Arc Furnace With Advanced Technology Images
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