Mineral Wool, Rock Wool Furnace - AC Electric Arc Furnace(New)

Product Specification

 Mineral Wool, Rock Wool Furnace - AC Electric Arc Furnace(New)

Application of equipment:

This equipment is used to receive hot melt slag from ironmaking blast furnace, through a small amount of tempering (adjusting the mass of 10-15%), adjust the current and voltage to make the temperature of the flow port is stable, and use the patented equipment copper gate to control the flow of slag port, and continuously transport to the centrifuge to prepare mineral wool. By adjusting a small amount of mass (adjusting 10% of mass), the current and voltage are adjusted to make the temperature of the flow port stable, and the flow rate of the slag port is controlled by the patented equipment copper gate, which is continuously transmitted to the electric furnace equipment for preparing mineral wool.

Process overview:

  The slag bag containing industrial waste slag is transported to the electric furnace workshop with a slag truck or rail car, poured into the furnace, began to raise the temperature and adjust the composition, and determined by temperature measurement and sampling to meet the production requirements of mineral wool, and transported to the centrifuge and subsequent mineral wool production line to provide raw materials for the mineral wool production line.

Main parameters and performance:

1 Furnace capacity ~ 50t
2 Shell diameter Φ5200 ~ Φ5600
3 Shell height ~ 3500 mm
4 Electrode diameter Φ400mm
5 Electrode pole circle Φ1350 ~ Φ1400mm
6 Maximum electrode stroke 1800 mm
7. Transformer rated capacity 4000 KVA
Performance index:

(1) Slag production capacity: ~ 5 tons/hour (annual output of more than 30,000 tons)
(2) Slag temperature (mineral wool machine requirements) ~ 1500℃
(3) Original slag temperature ~ 1300℃ (to be measured)
(4) tons of cotton power consumption 350-500KWh/T;

3. Ton of cotton electrode consumption: 2.5-3.0Kg/t

1. Core Definition & Key Functions

1.1 Definition

1.2 Key Functions

• High-Temperature Melting: Quickly raises the temperature of raw materials to 1500-1700℃ through arc heating, ensuring complete melting of minerals and industrial solid wastes, and eliminating impurities to improve the purity of molten slag.
• Molten Slag Homogenization: Maintains stable furnace temperature and molten slag flow state through intelligent temperature control and stirring, ensuring uniform chemical composition and viscosity of molten material, which is critical for fiber formation quality.
• Energy Conservation & Emission Reduction: Adopts high-efficiency electric heating technology with thermal efficiency ≥75%, reducing energy consumption compared with traditional fuel-fired furnaces; equipped with flue gas purification systems to meet international environmental standards.
• Continuous Production Support: Features a large-capacity furnace body and automatic feeding/discharging system, enabling 24/7 continuous operation to match the large-scale production needs of mineral wool/rock wool.
• Waste Resource Utilization: Realizes the recycling of industrial solid wastes (metallurgical slag, tailings) as raw materials, reducing resource waste and environmental pressure, in line with circular economy development trends.

2. Core Structure & Technical Principles

2.1 Core Components

2.2 Technical Principles

1. Feeding Stage: Raw materials (basalt, metallurgical slag, etc.) are crushed and screened to a particle size of 5-30mm, then transported to the furnace body through the automatic feeding system.
2. Arc Ignition & Heating Stage: The power supply system outputs low-voltage, high-current electricity to the graphite electrodes; arcs are generated between the electrode tips and raw materials, releasing a large amount of heat to melt the raw materials.
3. Molten Slag Homogenization Stage: The molten slag is stirred by the electromagnetic force of the arc and the natural convection of the liquid, ensuring uniform temperature and chemical composition; the temperature control system maintains the molten slag at 1550-1650℃ (adjustable according to raw material characteristics).
4. Discharging Stage: The molten slag flows out through the tapping port or overflow port at a stable speed, and is sent to the centrifugal spinner or fiberizing equipment for subsequent fiber formation.
5. Flue Gas Treatment Stage: High-temperature flue gas is cooled by a heat exchanger (recovering waste heat for heating or power generation), then purified by dust collectors and desulfurization devices before reaching emission standards.

3. Key Technical Parameters

4. Product Features

• High Melting Efficiency: Arc heating directly acts on raw materials, with fast temperature rise and short melting cycle (15-30 minutes per batch), significantly improving production efficiency.
• Stable Fiber Formation Quality: Precise temperature control ensures uniform viscosity of molten slag, reducing fiber breakage and improving the tensile strength and thermal insulation performance of mineral wool/rock wool.
• Energy-Saving & Environmental Protection: Electric heating avoids smoke and harmful gas emissions from fuel combustion; the flue gas treatment system achieves near-zero pollutant emissions, meeting strict environmental requirements in Europe, North America, and other regions.
• Strong Raw Material Adaptability: Suitable for various raw materials such as basalt, diabase, metallurgical slag, and tailings; can adjust the melting process according to raw material composition to ensure product quality.
• Low Operation & Maintenance Costs: The electric heating system has a simple structure and low failure rate; graphite electrodes have a long service life, and maintenance is convenient, reducing overall operation costs.
• Large-Scale Production Compatibility: Modular design supports parallel operation of multiple furnaces, matching the production capacity of 5000-50,000 tons of mineral wool/rock wool per year.

5. Application Scenarios

• Mineral Wool/Rock Wool Production: Core melting equipment for thermal insulation material manufacturers, producing high-quality mineral wool, rock wool, and related products (such as insulation boards, blankets, pipes).
• Industrial Solid Waste Utilization: Treatment of metallurgical slag (steelmaking slag, non-ferrous metal smelting slag), tailings, and other industrial solid wastes, converting them into raw materials for mineral wool/rock wool.
• Thermal Insulation Engineering: Supporting equipment for thermal insulation projects in construction, petrochemical, power, and other industries, providing high-performance mineral wool/rock wool materials.
• New Building Materials Industry: Production of fire-resistant, sound-absorbing, and thermal insulation materials for green buildings, in line with global low-carbon building development trends.

6. Competitive Advantages

• Professional Process Optimization: Tailored for mineral wool/rock wool production, with optimized furnace structure and temperature control system to match the fiber formation process, ensuring product stability.
• International Certification & Compliance: Products have passed CE, ISO 9001, ISO 14001, and other international certifications, complying with technical and environmental standards in global markets.
• Customized Solutions: Provides personalized equipment design according to the user's raw material characteristics, production capacity, and product requirements, including furnace capacity, power configuration, and flue gas treatment systems.
• Comprehensive After-Sales Service: Offers one-stop services including equipment installation, commissioning, operation training, and overseas technical support; spare parts supply is timely to ensure uninterrupted production.