2000kg Electric Arc Furnace Melting Furnace for Silica Sand, Precious Metal
1. Overview
The electric arc furnace adopts ordinary power, top loading with unscrewing furnace cover, and the
tapping channel to tap steel. The structure adopts semi-hydraulic and furnace cover unscrewing type.
The pit-type layout can reduce the requirements for the height of the factory building.
2. Main features of the electric arc furnace
This electric arc furnace for steel making adopts basic furnace lining or acidic furnace lining for smelting oxides,
precious metal enrichment and other varieties.
This electric arc furnace equipment has the following main features:
▲ The electric arc furnace equipment is set with unscrewing furnace cover, top-loading, semi-hydraulic mechanism,
tapping through the tapping chute, and installation in the pit.
▲ Using copper tube type conductive cross arm.
▲ Use large cross-section water-cooled cables.
▲ Adopt integral furnace shell structure.
▲ The bottom of the electric arc furnace adopts a dish-shaped structure, which improves the reliability of the equipment
and prolongs the service life.
▲ The furnace cover rotation adopts the large turntable technology, which reduces the displacement of the
water-cooled cable, reduces the impedance, reduces the electric loss, reduces the power consumption, and
reduces the occupied area.
▲ The most advanced PLC electrode regulator is used to ensure the accuracy and reliability of the electrode
system to the greatest extent.
▲ The electrode lifting circuit is equipped to prevent the electrode from breaking and ensure the efficient operation
of the furnace.
▲ The voltage regulation method of the transformer is no-load electric voltage regulation.
▲ Secondary winding: Compression of the transformer body: Coil compression adopts special spring oil cylinder
pressure nails, all coils are assembled as a whole and vacuum-dried.
▲ The transformer can be overloaded by 20% for a long time, and has sufficient mechanical strength to ensure that
it can withstand frequent short-circuit impacts.
▲ The transformer is of forced oil circulating water cooling (OFWF) method, adopting a trouble-free forced oil circulating
water cooler.
▲ Transformer core materials are made of high-quality products.
▲ Transformer oil adopts 25# oil.
▲ The transformer is equipped with heavy gas, light gas, and pressure releaser protection functions, and the on-load
switch is equipped with heavy gas protection functions.
4. Main technical parameters
| NO. | Item | Unit | Value | Remark |
| 1 | Electric arc furnace rated capacity | T | 2 | |
| 2 | Shell diameter | mm | Φ2200 | Tapping chute |
| 3 | Lifting height of furnace cover | mm | 200 | |
| Furnace cover unscrew angle | ° | ～83 | ||
| Furnace cover lift and rotation | Hydraulic driving | |||
| 4 | Graphite electrode diameter | mm | 200 | |
| Electrode pole center diameter | mm | 620 | ||
| Electrode lifting stroke | mm | 1100 | ||
| Electrode up/down max speed | m/min | 3/2.5 | ||
| control method | Pinion-rack drive | |||
| Electrode arm form | Copper tube type conductive cross arm | |||
| 5 | Tapping Angle | ° | 45 | maximum |
| Slag inclination | ° | 15 | maximum | |
| 6 | Electric furnace transformer rated capacity | KVA | 1250 | Can be overloaded by 20% |
| primary voltage | KV | 10/6.3 | ||
| No cutoff pressure | V | 210-104 | 5- level non-excitation electric voltage regulation | |
| secondary current | A | 4000 | ||
| Transformer cooling form | Strong oil circulating water cooling | |||
| 7 | hydraulic system working pressure | MPa | 6 | |
| working medium | Wear-resistant hydraulic oil | |||
| 8 | cooling water system | Industrial water (including transformer cooling water) | ||
| Inlet pressure | MPa | ＞0.3 | ||
| Inlet water temperature | ℃ | ≤32 | ||
| water temperature | ℃ | ＜50 | ||
| Cooling water consumption | m3/h | ～20 |
EAF-1.5T electric arc furnace Supply Scope
| No. | Item | Content and scope | Q’ty |
| 1 | Mechanical part | ||
| 1.1 | Furnace body (φ2200) | Furnace shell, tapping chute, furnace door mechanism, etc. | 1 set |
| 1.2 | Water-cooled furnace cover ring | Water-cooled furnace ring, etc. | 1 set |
| 1.3 | Electrode lifting Mechanism | Three sets of columns, guide wheel device and insulating parts, gear-rack-reducer | 1 set |
| 1.4 |
Cover lifting and rotary mechanism |
Furnace cover rotating frame, furnace cover rotating mechanism, furnace cover lifting mechanism | 1 set |
| Furnace cover rotary slewing bearing | 1 set | ||
| 1.5 | Furnace tilting Mechanism | Tilting cradle, horizontal support, tilting platform, furnace cover rotation and unscrewing support | 1 set |
| 1.6 | Cooling system | Water distributors, return tank, pipeline valves and related instruments | 1 set |
| 2 | High current part | ||
| 2.1 | Conductive cross arm | Conductive copper tube type conductive cross arm 3 pieces,clamps, holding rings, etc. | 1 set |
| 2.2 | Short network system | Flexible compensators, conductive copper pipes, cable joints, brackets and fasteners, insulating parts, etc. | 1 set |
| Current Transformer | 3 pcs | ||
| 2.3 | Water-cooled cable | Large cross-section water-cooled cable | 1 set |
| 3 | Hydraulic system | ||
| 3.1 | Hydraulic station | Oil tank, high pressure oil filter, integrated valve block, cooling device, accumulator | 1 set |
| 3.2 | hydraulic cylinder | tilting cylinder | 1 |
| Electrode clamping cylinder | 3 | ||
| Furnace cover lifting rotary cylinder | 1 | ||
| 4 | Electrical parts | ||
| 4.1 | Furnace Transformer | HSSP-1250KVA, transformer accessories and oil-water cooler | 1 set |
| 4.2 | high pressure system | 10KV (6KV ) vacuum switch cabinet | 1 set |
| 4.3 | Low-voltage electric control foundation and automatic control system | Low-voltage power cabinet, electrical control cabinet, PLC main operation table and field operation box | 1 set |
