Non-Stick Aluminum Castable Specified for More Than 3,000 Cycles

Product Overview

Refractory lining is an important part of an aluminum melting tilting furnace because the lining is exposed to molten aluminum and elevated operating temperatures during repeated melting cycles.

The furnace described in the PDF uses a rectangular, single-chamber hydraulic tilting structure with regenerative natural gas combustion. It is designed for melting aluminum and aluminum alloy scrap, followed by skimming, refining, and temperature adjustment.

The refractory system uses different materials for the melting pool, furnace walls, roof, furnace door, and burner areas. Non-stick aluminum castable is specified for the melting pool bottom and walls, together with impermeable castable, lightweight insulation bricks, and aluminum silicate fiber materials.

Key Product Specifications

• Furnace Type: Tilting Aluminum Melting Furnace
• Structure: Rectangular, single chamber, hydraulic tilting
• 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
• Specified refractory lining life: >3,000 cycles
• Molten aluminum level accuracy: ≤±2 mm
• Hydraulic system design pressure: 16 MPa

The >3,000-cycle figure is specified in the proposal in connection with the refractory configuration and stated construction process. Actual service life depends on operating and maintenance conditions.

Non-Stick Aluminum Castable

Melting Pool Refractory Configuration

The aluminum melting furnace uses non-stick aluminum castable on the melting pool bottom and walls. Impermeable castable and lightweight insulation materials are also included in the lining configuration.

The furnace door uses high-strength steel-fiber castable, while high-strength refractory castable is specified around the burner ports. The furnace roof uses high-temperature castable together with insulation materials.

Refractory Service Life Above 3,000 Cycles

The proposal states that a mature refractory construction process can provide a lining service life of more than 3,000 cycles. This is a design specification in the technical proposal and should not be interpreted as a fixed service-life result under every production condition.

For overseas B2B buyers comparing refractory lining for aluminum melting furnaces, material type, molten-aluminum contact areas, insulation structure, and construction method are useful technical points for equipment evaluation.

Furnace and Thermal Parameters

The specified normal molten aluminum temperature is 690–760°C, with a maximum working temperature of 1200°C. Furnace wall temperature rise is specified at ≤55°C, excluding localized hot spots.

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

Melting and Hydraulic Tilting System

The performance guarantee specifies a melting rate of ≥4 t/h and unit gas consumption of ≤65 Nm³/t-Al, with testing based on 100% aluminum ingots and a melting endpoint of 720°C.

The hydraulic tilting system uses two tilting cylinders and proportional-valve control. A laser rangefinder continuously monitors molten aluminum level, while the electronic closed-loop system specifies level-control accuracy of ≤±2 mm.