5000kVA FeSi Submerged Arc Furnace Ferrosilicon electric furnaces are divided into reduction electric furnaces and refining electric furnaces. Reduction electric furnace, also known as submerged arc furnace or submerged arc furnace, adopts the submerged arc operation of inserting electrode into furnace charge. The reduction electric furnace has open, closed (or semi closed), and the furnace body has various forms such as fixation and rotation. Electric refining furnace is used to refine medium carbon, low carbon and micro carbon ferroalloys. The capacity of electric furnace is generally 1500 ~ 6000 KVA, which adopts the form of open fixing or tilting with cover. The former is similar to the reduction furnace and can be equipped with continuous self baking electrode; The latter is similar to electric arc steelmaking furnace, using graphite or carbon electrode.
1, Use of ferrosilicon
Ferrosilicon is an essential deoxidizer in steelmaking industry, and it is also added as alloying agent. In the steelmaking industry, about 3-5kg 75% ferrosilicon is consumed for every 1t of steel produced.
2, Main parameters of 4000kva electric furnace
1. Electrode diameter: φ 680mm
2. Shell diameter: φ 5300mm
3. Furnace diameter: φ 3800mm
4. Furnace depth: 1800mm
5. Furnace shell height: 3400mm
6. Diameter of polar circle: φ 1800±50mm
7. Working stroke of electrode: 1000mm
8. Electrode maintenance stroke: 1600mm
9. Taphole: 2
10. Rated capacity of transformer: 4000kva
11. Primary side voltage: 35kV
12. Rated current at secondary side: 20620a
13. Secondary voltage: 100 \ 104 \ 108 \ 112 \ 116 \ 120 \ 125V
Secondary common voltage 112V
100-112v constant current 112-125v constant power
| SN |
Description |
Unit |
Data |
Remark |
| 1 |
Rated transformer capacity |
kVA |
5,000 |
Three phase |
| 2 |
Primary voltage |
kV |
10 |
|
| 3 |
Secondary voltage |
V |
100 - 130 |
|
| 4 |
Rated secondary current |
A |
22,206 |
|
| 5 |
Electrode type |
|
|
Self baking |
| 6 |
Electrode diameter |
mm |
Φ750 |
|
| 7 |
Electrode pitch circle |
mm |
Φ1,900±100 |
Adjustable |
| 8 |
Electrode traveling stroke |
mm |
1,000/1,400 |
Operation/maintenance |
| 9 |
Electrode lifting mode |
|
|
Hydraulic cylinder |
| 10 |
Electrode traveling speed |
m/min |
0.5 |
|
| 11 |
Contract shoe nos. per electrode |
pcs. |
6 |
Forged copper |
| 12 |
Furnace shell diameter |
mm |
Φ6,500 |
|
| 13 |
Furnace shell hight |
mm |
3,700 |
|
| 14 |
Furnace bath diameter |
mm |
Φ4,600 |
|
| 15 |
Furnace bath depth |
mm |
1,800 |
|
| 16 |
Tapping hole number |
nos. |
2 |
|
| 17 |
Semi-closed hood diameter |
mm |
Φ6,900 |
|
| 18 |
Semi-closed hood height |
mm |
1,900 |
|
| 19 |
Hydraulic system working pressure |
MPa |
8 |
|
| 20 |
Hydraulic medium |
|
46# |
Mineral oil |
| 21 |
Cooling water working pressure |
MPa |
0.3 |
|
| 22 |
Cooling water circulation flow rate |
m3/h |
170 |
|
Industrial Silicon Furnace Application: Submerged arc furnace will be mainly applied for reduction of metallurgical ore to produce the FeSi, FeMg, FeCr, Ferrotungsten, SiMg and Titanium slag alloy, which will be the important material for metallurgical and chemical industries. Features of the equipment: For submerged arc furnaces, the lining will be made of carbon or magnesia refractory material. The electrode is self-baking. The electrode will be inserted into the charging material.' The material will be molten by arc and current. The charging material will be continuously adding. The tapping will be batch type. It is a continuously operation industry furnace.
Main equipment for submerged arc furnaces
1. Furnace Shell
2. Furnace Cover
3. Fume exhaust system
4. Electrode System: electrode holder, electrode lifting device and electrode clamping/
releasing device
5. Charging System
6. Hydraulic System
7. High Current System
8. Water-cycling system
9. Tapping System
10. Transformer
11. L.V & H.V system
| SN |
Equipment |
Qty |
Unit |
Remark |
| 1 |
Furnace shell and I beam supporters |
1 |
set |
Steel plate welded |
| 2 |
Fume hood and chimney |
1 |
set |
Steel plate welded |
| 3 |
Electrode holder device |
3 |
sets |
|
| 4 |
Electrode lifting & clamping device |
3 |
sets |
|
| 5 |
Hydraulic power pack |
1 |
set |
|
| 6 |
Pneumatic valve stand |
1 |
set |
|
| 7 |
Air compressor |
2 |
sets |
1 work, 1 standby |
| 8 |
Cooling water distributor |
1 |
set |
|
| 9 |
Short net & water cooled cables |
1 |
set |
Copper tube |
| 10 |
Insulating parts |
1 |
set |
|
| 11 |
Raw materials distributing & charging device |
1 |
set |
6 nos. material bins |
| 12 |
5,000kVA/20kV furnace transformer |
1 |
set |
China make |
| 13 |
20kV H.V. switchboard |
1 |
set |
KYN28-24kV |
| 14 |
L.V. control panels |
1 |
set |
|
| 15 |
PLC and HMI system |
1 |
set |
Siemens S7-300 |
Rotary furnace body system of industrial silicon furnace
The furnace shell diameter of large ferrosilicon and industrial silicon electric furnace is large, and the furnace size is large. The adoption of rotating furnace body technology can effectively improve the permeability of furnace charge, avoid the sintering of furnace charge into shell, expand molten pool, improve smelting conditions and improve smelting quality.
Lower controller of industrial silicon furnace
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