Product Overview

In recycled aluminum and aluminum alloy production, scrap feedstock can vary in form and composition. A melting furnace therefore needs to provide not only melting capacity but also suitable conditions for skimming, sampling, composition adjustment, and molten aluminum temperature control.

This rectangular tilting aluminum melting furnace uses a single-chamber hydraulic tilting structure and regenerative natural gas combustion. It is designed for melting aluminum and aluminum alloy scrap, followed by skimming, refining, sampling, composition adjustment, and temperature adjustment before casting.

Key Product Specifications

• Furnace Type: Tilting Aluminum Melting Furnace
• Structure: Rectangular, single chamber
• Tilting: Hydraulic
• Fuel: Natural gas
• Combustion: Regenerative combustion
• Melting rate: ≥4 t/h
• Unit gas consumption: ≤65 Nm³/t-Al
• Normal molten aluminum temperature: 690–760°C
• Maximum working temperature: 1200°C
• Molten aluminum level accuracy: ≤±2 mm
• Hydraulic system design pressure: 16 MPa

The melting rate and gas-consumption figures are performance guarantees under specified test conditions.

Aluminum Scrap Melting and Molten Aluminum Treatment

Melting and Melt Adjustment

The process includes furnace stirring, skimming, sampling and analysis, followed by composition and temperature adjustment. After treatment, the molten aluminum is prepared for the downstream casting process.

For users searching for an aluminum scrap melting furnace, this configuration is designed for applications where molten aluminum treatment continues after the initial melting stage.

Defined Melting Performance

The performance guarantee specifies a melting rate of ≥4 t/h and unit gas consumption of ≤65 Nm³/t-Al. The acceptance test uses 100% aluminum ingots and defines the test endpoint as molten aluminum reaching 720°C.

Actual melting performance can vary according to raw material condition, charging method, target temperature, and operating conditions.

Regenerative Natural Gas Combustion

Flue Gas Heat Recovery

The regenerative aluminum melting furnace uses a pair of regenerative burners that alternate between combustion and exhaust. Regenerative media absorb heat from the flue gas and reuse it to preheat combustion air during the reversing cycle.

The proposal specifies combustion-air preheating around 1000°C, main exhaust temperature around 200°C, and stated regenerative heat recovery efficiency above 85%.

These figures describe the heat-recovery design of the regenerative combustion system rather than the overall energy efficiency of the complete furnace under every operating condition.

Molten Aluminum Composition and Temperature Adjustment

After melting, the furnace supports stirring, skimming, sampling, analysis, composition adjustment, and temperature adjustment. The specified normal molten aluminum temperature is 690–760°C, with a maximum working temperature of 1200°C.

This allows the aluminum melting furnace to function as both a melting unit and a molten aluminum treatment stage before casting.

Hydraulic Tilting and Level Control

Two hydraulic tilting cylinders provide furnace movement, with proportional-valve control for continuous tilting-speed adjustment. Tilting speed can be coordinated with casting speed.

A laser rangefinder continuously detects molten aluminum level, while an encoder measures tilting angle. The electronic closed-loop system specifies molten aluminum level control accuracy of ≤±2 mm.