25T Electric Arc Furnace

The 25t electric arc furnace is a furnace cover rotating, top loading, eccentric bottom tapping type. The electrode lifting adopts an electrode liftin

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25t Electric Arc Furnace

25t electric arc furnace Introduction

The 25t electric arc furnace is a furnace cover rotating, top loading, eccentric bottom tapping type. The electrode lifting adopts an electrode lifting mechanism and PLC control. The design principle of the 25t electric arc furnace is to ensure that the equipment is advanced and mature in technology, reliable in operation, and suitable for the characteristics of the metallurgical industry. Comprehensive production practices at home and abroad in recent years have proven that electric arc furnaces can meet the requirements of high quality, high output, low consumption, production process automation, safety and environmental protection.

25t Electric Arc Furnace Application

This 25t electric arc furnace is used for ordinary structural steel, high-quality steel and advanced alloy structural steel.

25t Electric Arc Furnace Equipment Performance and Technical Parameters

Furnace shell inner diameter Φ4000mm
Rated capacity 25t
Maximum capacity 33t
Transformer rated capacity 12.5MVA top line
Transformer primary voltage 6300V
Transformer secondary voltage to be determined V
Transformer voltage regulation method: no-load electric
Frequency 50
Graphite electrode diameter Φ400mm
Electrode distribution circle diameter Φ800mm
Maximum moving distance of electrode 2800mm
Maximum electrode moving speed (ascending/descending) 6000/4500mm/min (manual)
Furnace tilting angle 20° (steel tapping) 12° (slag tapping)
Furnace cover lifting height 400mm
Slag discharge door size (width×height) 1000×800mm×mm
Furnace lid swing angle 62°
Water consumption 300m3/h Hydraulic device working pressure 12MPa
Hydraulic medium water glycol
Water inlet pressure of water cooling device 0.2~0.3/0.45 MPa open loop/closed loop
Compressed air pressure 0.4-~0.6 MPa
Operation mode left, right
Oxygen blowing volume 50 NM3/ton of steel
Furnace door oxygen gun 1 set
Smelting time 100min Number of feedings: 2 times

25t Electric Arc Furnace Usage Conditions

Ambient temperature +5~+40℃.
The altitude does not exceed 1000m.
The monthly average of the daily maximum relative humidity in the wettest month of the use area is ≤90%.
There is no conductive dust, explosive gas or corrosive gas that can seriously damage metal and insulation.

Electric Arc Furnace Furnace Body

The furnace body consists of a furnace shell, a furnace door mechanism, a taphole mechanism, etc. The diameter of the furnace shell is Φ4000mm. The furnace shell is a truncated cone structure welded by steel plates, and the furnace shell material is 20g.

Arc Furnace Tilting Device

The Arc Furnace tilting furnace device consists of a driving track, a tilting furnace cylinder, a tilting platform and its horizontal support mechanism, and a furnace cover unscrewing support mechanism.
The furnace body is installed on the tilting platform, and the electric furnace slag removal and steel tapping operations are completed through the tilting furnace device. The tilting track is a steel plate welded structure, its bottom surface is fixed to the foundation, and the upper surface is provided with meshing holes. The tilting furnace platform is made of steel plates and is used to support the furnace body and the upper structure of the electric furnace. The meshing holes on the arc-shaped track below the tilting furnace platform cooperate to realize the rolling forward and backward tilting movements of the furnace body.

Arc Furnace Water-cooled furnace cover

The water-cooled furnace cover is a sealed fully water-cooled tubular furnace cover, which is welded with 20g seamless steel pipes to form an efficient water-cooling forced circulation with uniform flow and no dead points. The inner wall is welded with self-hanging slag nails, except for three In addition to the electrode holes, there must be holes that can be filled with alloys; the lifting and lowering of the furnace cover are realized by hydraulic sprockets (the design should have sufficient lifting force).

25t Electric Arc Furnace Water-cooled Furnace Cover Technical Parameters

Furnace cover lifting height (mm): 300~500
Furnace lid lifting speed (m/min): 3
Water-cooled furnace cover life: 3000 times

Furnace Lid Lifting and Rotating Mechanism

The furnace cover rotating mechanism consists of a driving cylinder, a rotating arm, a turntable bearing and a large rotating shaft. The above-mentioned components constituting the rotating device are connected to each other and then installed under the tilting platform to realize the rotation of the furnace cover.
There are rotating frame locking mechanisms on both sides of the rotating frame. When the furnace cover rotates back to the position directly above the furnace body, it is locked by the two locking mechanisms. In this way, the upper structure of the entire rotating frame is supported on the tilting platform, and the electrode lifting mechanism is used for arc smelting. More stable and reliable.

Furnace Electrode Lifting Mechanism

The electrode lifting mechanism is composed of a conductive cross arm, an electrode clamping mechanism, a column, a plunger hydraulic lifting cylinder, etc.

SanRui 25 T Electric Arc Furnace Technical Advantages

Use scrap steel basket for feeding;
Copper-steel composite conductive cross arm and large-section water-cooled cable;
The furnace cover adopts frame type tubular water-cooled furnace cover;
The furnace structure adopts an integral tilting platform;
Tap out the steel from the tapping trough;
The slag tank discharges slag;
Computer and PLC control, the electrode regulator adopts constant impedance adjustment technology);
Use mobile hood for dust removal;
The self-consumable furnace door carbon and oxygen gun injection technology is adopted to shorten the smelting cycle and reduce power consumption.

Sanrui provides engineering consulting, R&D, design, equipment supply, system integration and software preparation, construction, installation, commissioning, project management, technical services and training, production guidance, operation and maintenance, spare parts supply and other comprehensive engineering and technical services.

Send us your project details and our team of engineers will design a steelmaking electric arc furnace solution based on your needs.

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