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Syed Rashid Ahmed ButtShaanxi Chengda Industrial Furnace Co., Ltd. completed the commissioning of electric arc furnace, the workers carefully cooperated with Chengda engineers to learn and operate the equipment, showing the deep friendship and excellent cooperation between the people of China and Pakistan. -
AboubacarAfter more than 1 month of intense production and debugging, 2 sets of heat exchange flue gas settling chamber equipment has been successfully put into operation ~ All the personnel involved in the project have worked hard! ~ -
Ji-hwan【 Warm congratulations 】 Shaanxi Chengda Industrial Furnace Manufacturing Company in South Korea, North Chungcheong County precious metal smelting furnace equipment installation and careful manufacturing and strict commissioning, looking forward to the future in more fields to achieve mutually beneficial win-win cooperation!
Contact Person :
Du
Phone Number :
13991381852
Large-Capacity White Fused Alumina Arc Furnace
| Place of Origin | China |
|---|---|
| Brand Name | Shaanxi Chengda |
| Certification | ISO 9001 |
| Model Number | Negotiate based on equipment processing capacity |
| Minimum Order Quantity | 1 unit |
| Price | The price will be negotiated based on the technical requirements and supply scope of Party A |
| Packaging Details | Discuss according to the specific requirements of Party A |
| Delivery Time | 2 months |
| Payment Terms | L/C,T/T,Western Union |
| Supply Ability | Complete production supply chain, supply on time, and meet quality standards |
Product Details
| Highlight | white fused alumina arc furnace,large-capacity arc furnace,ferroalloy refining equipment |
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|---|---|---|---|
Product Description
Large-Capacity White Fused Alumina Arc Furnace
Equipment Introduction & Parameters
Large-capacity white fused alumina arc furnaces are core thermal equipment for producing high-purity white fused alumina (α-Al₂O₃). Using industrial alumina powder as raw material, they melt, purify and recrystallize the material at temperatures above 2000℃ generated by electrode arcs. "Large capacity" generally refers to equipment with a transformer capacity ≥ 4000 kVA and single furnace output ≥ 5 tons, featuring high efficiency, low energy consumption and stable performance for large-scale production.
1. Core Equipment Structure
1.1 Furnace System
- Furnace Shell: Welded with 20g boiler steel plate, thickness 18–25 mm, circular structure without stiffeners, ensuring tightness and strength.
- Furnace Lining: Constructed with high-alumina refractory bricks or castables, resistant to temperatures above 2200℃, corrosion and erosion, with adequate permeability to prevent melt blowback.
- Furnace Cover: Water-cooled composite steel structure, cylindrical type, equipped with electrode holes, charging holes and observation ports, rotatable and liftable.
- Tilting Mechanism: Fixed type (block furnace) or hydraulic tilting type, tilting angle 0–45°, convenient for slag and block discharge.
1.2 Electrode System
- Electrodes: High-power graphite electrodes, commonly Φ300–Φ450 mm for large-capacity furnaces, arranged in an equilateral triangle.
- Lifting Device: Driven by variable-frequency motor, lifting speed 1.5–2.5 m/min, stroke 1600–2200 mm, with automatic constant-current / constant-power regulation.
- Clamping System: Belt-type or hydraulic chucks, water-cooled, ensuring reliable conductivity and clamping.
1.3 Electrical System (Core)
- Transformer: Special on-load voltage-regulating rectifier transformer, commonly 6000–10000 kVA (6–10 MVA) for large-capacity models.
- Short Network: Composed of water-cooled cables, copper bars and conductive cross-arms, arranged in triangular form with three-phase impedance unbalance < 8% to reduce energy consumption.
- Control System: Fully automatic PLC control, monitoring current, voltage, power, temperature and electrode position.
1.4 Auxiliary Systems
- Cooling System: Spray cooling for furnace walls, internal water cooling for furnace cover, electrodes and short network; water consumption 150–300 t/h, equipped with pressure and temperature alarms.
- Charging System: Top furnace bin / charging tank, automatic or semi-batch feeding.
- Flue Gas Dedusting: Fully sealed gas hood with bag filter to meet environmental emission standards.
- Oxygen Injection: Top-blowing oxygen device for auxiliary melting, stirring and impurity removal.
2. Typical Large-Capacity Specifications
| Item | 4000 kVA (5t) | 6300 kVA (8t) | 10000 kVA (12–15t) |
|---|---|---|---|
| Transformer Capacity | 4000 kVA | 6300 kVA | 10000 kVA |
| Rated Furnace Capacity | 5 tons/heat | 8 tons/heat | 12–15 tons/heat |
| Furnace Shell Inner Diameter | Φ2800 mm | Φ3400 mm | Φ4200 mm |
| Furnace Shell Depth | 1400 mm | 1700 mm | 2000 mm |
| Graphite Electrodes | Φ250 mm × 3 | Φ350 mm × 3 | Φ450 mm × 3 |
| Secondary Voltage | 180–390 V (22 steps) | 160–360 V (27 steps) | 140–320 V (33 steps) |
| Rated Current | Approx. 9200 A | Approx. 14500 A | Approx. 22000 A |
| Smelting Cycle | 6–7 hours | 7–8 hours | 8–10 hours |
| Unit Power Consumption | 1700–1900 kWh/t | 1650–1800 kWh/t | 1600–1750 kWh/t |
| Cooling Water Volume | Approx. 200 t/h | Approx. 250 t/h | Approx. 300 t/h |
| Furnace Type | Fixed / Tilting | Tilting | Tilting |
| Total Equipment Weight | Approx. 120 t | Approx. 180 t | Approx. 260 t |
3. Working Principle & Process
- Raw Material: Industrial alumina powder (Al₂O₃ ≥ 98.5%), with strict control of Na₂O, SiO₂ and Fe₂O₃ impurities.
- Arc Ignition: Electrodes lower down and energize to start arcing, raising furnace temperature to 2200–2300℃.
- Smelting: Batch feeding with closed-chamber method (thick material layer) for high thermal efficiency and low energy consumption.
- Refining: Holding for 4–6 hours to separate and remove impurities; β-Al₂O₃ (sodium impurities) segregated and eliminated.
- Cooling: Natural cooling for 24–36 hours after power-off to form dense white fused alumina clinkers.
- Post-Treatment: Crushing, sieving, acid washing and sorting to obtain finished product with Al₂O₃ ≥ 99%.
4. Performance Features
- High Purity: Product Al₂O₃ ≥ 99.0%, high whiteness and low impurities.
- High Output: 10000 kVA furnace achieves daily output of 30–35 tons, suitable for mass production.
- Low Energy Consumption: Higher thermal efficiency in large-capacity furnaces, unit power consumption 5–10% lower than small furnaces.
- Stability & Reliability: High automation, long furnace lining life, stable continuous operation.
- Environmental Protection: Fully sealed structure with high-efficiency dust removal, flue gas meets emission standards.
5. Main Applications
- Abrasives & Grinding Tools: Ceramic / resin abrasives, sandpaper, abrasive belts, grinding powders for precision grinding and polishing.
- Refractory Materials: High-grade refractory bricks, castables, nozzles, sliding plates for metallurgical, building materials and petrochemical high-temperature kilns.
- Functional Ceramics: Electronic ceramics, ceramic cutting tools, high-temperature structural components.
- Others: Precision casting sand, sandblasting media, anti-corrosion fillers, refractory fibers, etc.
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