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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
Aluminum Ash Treatment Equipment with 1550-1650℃ Melting Temperature, 750-850kWh/t Power Consumption, and 60-160t Daily Treatment Capacity
| 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
Product Description
Introduction to Equipment and Parameters
I. Process Principle
Using aluminum ash (containing Al₂O₃, metallic Al, AlN and a small amount of salts) and CaO (lime) as raw materials, solid-phase/liquid-phase reactions occur in an electric furnace at high temperature of 1550–1650℃:
- Main reaction: 3CaO + Al₂O₃ → 3CaO·Al₂O₃ (calcium aluminate)
- Side reactions: Oxidation/reduction conversion of AlN and metallic Al; volatilization and removal of salts
- Product: Pre-melted calcium aluminate (steelmaking refining slag, deoxidizer/desulfurizer)
II. Core Equipment Composition (Complete Production Line)
1. Pretreatment System
- Crushing and Screening Machine: Crushes aluminum ash to ≤50mm, removes iron and impurities
- Batching Station: Automatic metering of aluminum ash, CaO, reducing agent (coke) and modifier (MgO)
- Ratio: Aluminum ash 40–65%, CaO 35–45%, MgO 0–15%
- Mixer/Briquetting Machine: Mixes materials evenly; briquetting is available to increase melting speed
2. Core Equipment: Calcium Aluminate DC Electric Arc Furnace
Structure
- Furnace body: Round/square, steel shell + composite refractory lining (corundum-mullite/magnesia-chrome brick)
- Electrode: Graphite electrode (double/three electrodes)
- Power supply: DC rectifier power supply (1000–10000kVA)
- Furnace tilting mechanism: Hydraulic tilting (for slag discharge)
- Cooling system: Water cooling for furnace shell and electrode chuck
- Flue gas system: Purification of high-temperature flue gas, fluoride and salt mist
Main Models and Parameters (DC Furnace)
| Parameter | Typical Value (3000kVA / 6300kVA) |
|---|---|
| Transformer Capacity | 3000kVA / 6300kVA |
| Operating Voltage | 150–300V |
| Operating Current | 8–15kA / 15–25kA |
| Melting Temperature | 1550–1650℃ |
| Melting Cycle | 45–60min/heat |
| Daily Aluminum Ash Treatment Capacity | 60–80t / 120–160t |
| Power Consumption | 750–850kWh/t product |
| Electrode Consumption | 3–5kg/t (40% lower for DC than AC) |
| Lining Service Life | 300–500 heats |
Technical Advantages (DC vs AC)
- Electrode consumption reduced by 40%
- No reactive power compensation required, lower investment
- Noise reduced by 10–20dB
- Strong electromagnetic stirring, uniform composition and fast melting speed
- Insulating shell easily formed in case of power failure, protecting furnace lining
3. Post-treatment System
- Slag Discharge/Cooling: Tapping of hot slag → water quenching/air cooling → crushing
- Crushing and Screening Line: Jaw crusher + roller crusher + vibrating screen
- Finished particle size: 1–10mm, 10–50mm (for steelmaking)
- Overscreened powder returned to furnace for remelting
- Storage and Packaging: Finished product silo, automatic packaging (25/50kg/bulk bag)
4. Environmental Protection Supporting Facilities
- Flue Gas Purification:
- Quench tower (temperature controlled below 200℃)
- Bag filter (fluoride adsorption)
- Alkaline washing tower (removal of HCl, F⁻ and salt mist)
- Wastewater: Cooling circulating water + small amount of acid-base neutralization
- Solid Waste: Almost no secondary waste residue (full conversion)
III. Product: Calcium Aluminate (Finished Product Indexes)
- Main phases: 3CaO·Al₂O₃, 12CaO·7Al₂O₃
- Typical composition (wt%):
- Al₂O₃: 55–65%
- CaO: 30–40%
- MgO: 2–5%
- SiO₂: ＜3%
- F⁻, S, P: ＜0.1%
- Application: Pre-melted refining slag for steelmaking, high-efficiency desulfurizer, deoxidizer
IV. Technical Features
- Resource utilization: Turns aluminum ash into treasure, Al₂O₃ utilization rate >90%
- Harmless treatment: Decomposition of AlN, removal of salts, solidification of heavy metals
- High efficiency: Short single-heat cycle, high continuity and automation
- Low consumption: Significantly lower power and electrode consumption of DC furnace than traditional processes
V. Selection Suggestions
- Small-scale line: 1250–3000kVA DC furnace, daily treatment capacity 30–80t aluminum ash
- Medium-scale line: 3000–6300kVA DC furnace, daily treatment capacity 80–160t aluminum ash
- Large-scale line: 6300–10000kVA DC furnace, daily treatment capacity 160–300t+ aluminum ash
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