Introduction to Fly Ash Rock Wool Electric Furnace

Core Working Principle

1. Raw Material Preparation: Fly ash is mixed with modifiers (e.g., lime, feldspar) to adjust acidity coefficient (1.5–2.0) and melt viscosity.
2. Electric Melting: Three‑phase AC or DC power generates submerged arcs, heating the furnace to 1,350–1,550°C to fully melt the mixture into homogeneous molten slag.
3. Vitrification & Purification: High temperature decomposes dioxins (destruction rate >99.99%) and stabilizes heavy metals in the glassy phase.
4. Fiber Formation: Molten slag flows continuously to a centrifuge at 3.3–4.0 t/h to form rock wool fibers.

Main Structure

• Furnace Body: Steel shell with high‑purity MgO‑C refractory lining, resistant to high temperature and corrosive slag.
• Electrode System: 3 graphite electrodes (φ400–600 mm) with automatic lifting; powered by a dedicated transformer.
• Power Supply: Transformer capacity 3,000–10,000 kVA (common: 5,000–7,500 kVA).
• Tilting & Tapping: Hydraulic tilting (max 45°) and bottom tapping for continuous slag discharge.
• Control System: PLC/DCS for automatic temperature, power, and flow regulation.
• Auxiliary Systems: Dust collection, waste heat recovery, and flue gas treatment.

Typical Technical Parameters

Product Specifications (Rock Wool)

Key Advantages

1. Harmless Disposal: Destroys dioxins and stabilizes heavy metals, fully complying with fly ash treatment standards.
2. Resource Recycling: Converts hazardous waste into high‑value insulation material.
3. Energy Efficient: Electric heating reduces energy consumption by >40% vs. coke‑fired cupolas.
4. Stable Quality: Precise temperature control ensures uniform fiber properties.
5. Low Emission: Near‑zero dust and flue gas pollution.
6. Long Service Life: Continuous operation >8,000 hours annually.

Typical Application Process

1. Batching: Fly ash + modifiers → proportioning and mixing.
2. Charging: Continuous feeding into the electric furnace.
3. Melting: Submerged‑arc heating to form molten slag.
4. Refining: Slag homogenization and impurity removal.
5. Fiberization: Slag → centrifuge → rock wool fibers.
6. Post‑Treatment: Cooling, curing, and cutting into finished products.

Applications

• Waste Treatment: Harmless disposal of municipal solid waste incineration fly ash.
• Building Insulation: High‑performance rock wool for walls, roofs, and pipelines.
• Industrial Insulation: High‑temperature insulation for furnaces and equipment.

  Shaanxi Chengda Industrial Furnace Manufacturing Co., Ltd. is a high-tech enterprise specialized in the research, design, and manufacturing of various industrial furnaces, including AC and DC steelmaking electric arc furnaces, ladle refining furnaces, ferroalloy ore thermal furnaces, ferroalloy refining furnaces, electric slag remelting furnaces, non-standard metallurgical equipment, heat treatment equipment, and various related environmental protection dust removal equipment. The company's product design and manufacturing capabilities have reached 100 tons for electric arc furnaces, 160 tons for ladle refining furnaces, and a capacity range of 3600KVA to 35000KVA for ore thermal furnaces. In accordance with national industrial policies, we have designed high and low voltage compensation systems, dust removal systems, ferroalloy DC furnaces, and new energy equipment suitable for the actual operation of the equipment. For inquiries, please contact Mr. Du at 13991381852 or Mr. Chen

13709182307.