DC Electric Arc Furnace
DC Electric Arc Furnace
Direct current electric arc furnace and DC submerged arc furnace that directly heat the furnace charge with 4000 °C arc heat. XCK series, 0.5 to 100 ton capacity, furnace inner diameter 2000 to 6200 mm.
Specifications
- XCK-0.5
- Dia 2000mm | Capacity 0.5/1t | Transformer 630kVA | Voltage 200-98V | Reactor 120kVA | Circle 500mm | Electrode 150mm
- XCK-1.5
- Dia 2200mm | Capacity 1.5/3t | Transformer 1250kVA | Voltage 210-104V | Reactor 200kVA | Circle 650mm | Electrode 200mm
- XCK-3
- Dia 2600mm | Capacity 3/8t | Transformer 2200kVA | Voltage 210-104V | Reactor 250kVA | Circle 750mm | Electrode 250mm
- XCK-5
- Dia 3200mm | Capacity 5/12t | Transformer 3200kVA | Voltage 221-110V | Reactor 320kVA | Circle 850mm | Electrode 300mm
- XCK-10
- Dia 3500mm | Capacity 10/16t | Transformer 5000/6300kVA | Voltage 240-121/260-139V | Reactor 360kVA | Circle 1000mm | Electrode 350mm
- XCK-15
- Dia 3700mm | Capacity 15/20t | Transformer 6300/9000kVA | Voltage 260-139V | Reactor 340kVA | Circle 1000mm | Electrode 350mm
- XCK-20
- Dia 4000/4200mm | Capacity 20/32t | Transformer 9000/12500/16000kVA | Voltage 260-139/340-195/375-200V | Circle 1000/1050mm | Electrode 350/400mm
- XCK-30
- Dia 4600mm | Capacity 30/45t | Transformer 16000/25000/32000kVA | Voltage 375-200/570-350/650-350V | Reactor 4000/6800kVA | Circle 1100mm | Electrode 450mm
- XCK-50
- Dia 5000mm | Capacity 50/60t | Transformer 25000/32000/35000kVA | Voltage 570-350/650-350/670-370V | Reactor 4000/6800/7800kVA | Circle 1100mm | Electrode 450mm
- XCK-80
- Dia 5800mm | Capacity 85/95t | Transformer 35000/40000/50000kVA | Voltage 650-350/690-390/800-500V | Reactor 6800/8500/9800kVA | Circle 1100/1250/1300mm | Electrode 450/500mm
- XCK-100
- Dia 6200mm | Capacity 100/120t | Transformer 35000/50000/63000kVA | Voltage 670-320-370/800-650-400/920-720-480V | Reactor 7800/9800/13000kVA | Circle 1100/1300/1350mm | Electrode 450/500/600mm
Direct current electric arc furnace: both DC electric arc furnaces and DC submerged arc furnaces are industrial furnaces that directly heat the furnace charge with the heat of the arc light. The XCK series covers furnace inner diameters from 2000 to 6200 mm and rated capacities from 0.5 to 100 tons, with maximum capacities up to 120 tons.
Equipment structure
Furnace shell: welded from 20 mm thick steel plate (Q235) and circular in shape. Furnace cover: the inner side of the upper part of the Q235 furnace cover is welded with slag-hanging nails that can carry refractory insulation materials, and the cover is a semi-sealed integral support frame. Electrode lifting device and electrode cross arm: composed of an electrode cross arm, a column, an electrode lifting trolley and guide wheels. Short network system: connected to the secondary output terminal of the electric furnace transformer through the rectifier power cabinet, reactor, water-cooled cables, conductive cross arm and graphite electrode. Hydraulic system: composed of the hydraulic pump unit, accumulator and control valve group. Cooling water system: composed of pressure gauges, thermometers, butterfly valves, water distribution radiators, return water tank and pipelines; the external cooling water source is connected to the workshop inlet pipe, with a pressure of not less than 0.3 MPa and an inlet water temperature not exceeding the ambient temperature.
Process description
Materials are sent into the semi-enclosed furnace body, where the alternating current is converted into direct current by the rectifier transformer and the rectifier power supply cabinet. The current enters the furnace through the electrode, and the electrode short-circuits with the furnace bottom to generate an arc light with an ultra-high temperature of 4000 °C. The mixed raw materials are continuously melted through arc heat, resistance heat and reaction heat. Throughout the smelting process, the intensity of voltage and current on the electrode is set according to the smelting process parameters, and the power input differs at different periods. The electrode is inserted into the raw material inside the furnace for submerged arc operation, and the gas overflows evenly from the gaps on the material surface. The well-mixed charge is automatically added into the furnace as the material surface descends, keeping the material surface inside the furnace at a set height. A ramming machine is used to drill holes and pound materials according to furnace requirements. When the material in the furnace melts to a certain extent, the furnace eye is opened with a furnace eye opener and the molten material is released for casting onto the casting mold. Demolding follows after the iron box cools.
Application cases
Typical applications include copper smelting (copper water production and finished copper ingots), zinc smelting and zinc ingot casting, material melting, and supporting ingot casting lines. The complete set includes the electrical cabinet, rectifier power supply, cooling tower, circulating water pool, water-cooled furnace cover and dust removal system.