8000kva Submerged arc furnace for industrial silicon melting furnace 8000kva
1. Equipment feature
1.1 Water cooled short net: includes water cooled copper tube bus-bar, water cooled cables, forged copper contact pad, etc.
1.2 Pressure ring type electrode holder: hydraulic type pressure holder keeps copper pads and electrode contacting good.
1.3 Hydraulic electrode lifting and pneumatic electrode clamping.
1.4 Semi-closed type lower fume hood.
1.5 Furnace top materials distribution and charging device.
1.6 PLC and HMI automation control system.
2. Main parameter
2.1 Furnace transformer Rated capacity 8,000kVA
Primary voltage 20kV, 3 phase, 50Hz
Secondary voltage 146-197-248 V S
Secondary current 29.3kA
Tap changer onload typeImpedance voltage ≤ 6% @ 197V tap Connection Dd0,
2.2 Furnace Electrode type Soderberg
Diameter of electrode Φ1,250mm
Electrode PCD diameter Φ3,100 +/- 100mm
Electrode traveling speed 0.5m/min.
Electrode traveling stroke 1,500mm (2,000mm for maintenance)
Furnace shell (D/H) Φ9,200mm/5,600mm
Furnace hearth (D/H) Φ7,200mm/3,050mm
Tapping nos. 5 nos. / angle: 72°
Furnace body rotation speed 90-240 hour/360°
Hydraulic working pressure 12MPa
Cooling water quality Industry clean water Cooling water working pressure 0.3MPa
Cooling water circulation flow 400t/h
| SN |
Equipment |
Qty |
Unit |
Remark |
| 1 |
Furnace shell |
1 |
set |
Steel plate welded |
| 2 |
Fume hood and chimney |
1 |
set |
Steel plate welded |
| 3 |
Electrode holder device |
3 |
sets |
Pneumatic type |
| 4 |
Electrode lifting & clamping device |
3 |
sets |
Hydraulic type |
| 5 |
Hydraulic power pack |
1 |
set |
|
| 6 |
Pneumatic valve stand |
1 |
set |
|
| 7 |
Cooling water distributor |
1 |
set |
|
| 8 |
Short net with water cooled cables |
1 |
set |
Copper tube |
| 9 |
Insulating parts |
1 |
set |
|
| 10 |
Raw materials distributing & charging device |
1 |
set |
6 nos. material bins |
| 11 |
Tapping fume extraction device |
1 |
set |
|
| 12 |
8000kVA/20kV furnace transformer |
1 |
set |
|
| 13 |
20kV H.V. switchboard |
1 |
set |
KYN28-24kV |
| 14 |
L.V. control panels |
1 |
set |
GGD type panel |
| 15 |
PLC and HMI station |
1 |
set |
Siemens S7-1500 |
| 16 |
Arc burner |
2 |
nos. |
|
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
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