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Detailed introduction
Versatile gas-fired crucible furnace for non‑ferrous metals (Al, Zn, Pb) below 850°C · Capacities 200–1000 kg · Low‑NOx burner & PID control
Primary Application
The natural gas crucible aluminum melting furnace is designed for melting non‑ferrous metals and their alloys with melting points below 850°C, such as aluminum, zinc, and lead. Its main advantages are high portability and flexibility, making it suitable for use as either a melting furnace or a holding furnace in foundries, laboratories, and small‑batch production environments.
Main Features
Sturdy steel shell: Manufactured from high‑quality steel plates, roll‑formed and welded, with internal channel steel reinforcement. The robust construction ensures long service life and withstands mechanical and thermal stresses.
High‑strength refractory lining: The circular furnace chamber is built with high‑strength shaped bricks, tightly packed without gaps. The bottom uses insulating bricks topped with castable refractory for excellent thermal insulation and durability. The burner area is made of high‑temperature castable refractory to resist heat and prolong service life.
Advanced insulation: Combines aluminum silicate fiber blankets, high‑temperature calcium silicate boards, and nano‑insulation materials with a total thickness of 200 mm. This minimizes heat loss to the outer shell, reduces energy consumption, and keeps the surface temperature low.
Leakage protection & waste heat recovery: The furnace bottom includes a molten metal drainage port and a leakage alarm. In case of crucible rupture, molten metal flows out safely, protecting the lining and burner. An upper flue gas recirculation port directs heat over the crucible top to preheat charge materials, utilizing residual heat efficiently. The exhaust stack uses high‑temperature stainless steel elbows for durability.
Imported low‑NOx burner: Ensures safe, reliable, and complete combustion with low failure rates and emissions compliant with environmental standards.
Precise digital temperature control: Two digital intelligent PID controllers with furnace thermocouple (4–20 mA output) provide accurate temperature regulation, high control precision, and low maintenance.
Flame failure safety: If ignition fails, the burner control panel and main control panel indicate a fault, and the system automatically shuts off the burner to prevent gas accumulation.
Summary: This gas crucible melting furnace combines robust construction, efficient insulation, and intelligent controls to deliver reliable, energy‑saving melting for non‑ferrous metals. Its portability and flexibility make it an ideal choice for foundries requiring adaptable melting solutions.
Technical Specifications
Crucible dimensions, furnace dimensions, burner power rating, and capacity for each model.
| No. | Crucible Size (mm) | Furnace Size (mm) | Burner Power (kW) | Capacity (kg) |
|---|---|---|---|---|
| 1 | 565×617 | Φ1320×h1100 | 110 | 200 |
| 2 | 640×640 | Φ1380×h1100 | 230 | 280 |
| 3 | 710×700 | Φ1460×h1150 | 320 | 350 |
| 4 | 775×750 | Φ1540×h1150 | 320 | 500 |
| 5 | 775×900 | Φ1540×h1350 | 320 | 600 |
| 6 | 826×900 | Φ1600×h1350 | 450 | 700 |
| 8 | 880×1050 | Φ1660×h1500 | 450 | 840 |
| 9 | 1040×900 | Φ1540×h1350 | 450 | 1000 |
* Other capacities and custom designs are available upon request.
Frequently Asked Questions (FAQ)
What is the warranty period for this furnace?
We offer a one-year comprehensive warranty covering all manufacturing defects and key components (including the burner, control system, thermocouples, and refractory lining). Extended warranty options are available upon request.What metals can be melted in this furnace?
This furnace is designed for non-ferrous metals with melting points below 850°C, including aluminum, zinc, lead, and their alloys. It is not suitable for copper or steel.How does the leakage alarm work?
The furnace is equipped with a molten metal leakage port at the bottom and an alarm system. If the crucible cracks and metal leaks, it flows out through the port, protecting the refractory lining and burner. The alarm triggers immediately to alert the operator.Is the furnace easy to move and relocate?
Yes, the crucible furnace is designed with portability in mind. Its compact structure and rugged steel shell allow it to be moved with appropriate lifting equipment, offering high flexibility for foundries with changing production needs.What type of burner is used?
We use an imported low-NOx burner that ensures complete combustion, high reliability, and low failure rates. It is equipped with automatic ignition and flame monitoring for safe operation.How is the temperature controlled?
The furnace uses two digital intelligent PID controllers with a furnace thermocouple (4–20 mA output). This provides precise temperature regulation, high accuracy, and low maintenance requirements.What insulation materials are used?
The furnace features 200 mm thick insulation combining aluminum silicate fiber blankets, high-temperature calcium silicate boards, and nano-insulation materials. This ensures excellent heat retention, energy savings, and low outer shell temperature.Can the furnace be customized for larger capacities?
Yes. We offer custom engineering solutions for capacities above 1000 kg, as well as special crucible dimensions and control configurations to meet specific production requirements.
Why Choose This Natural Gas Crucible Aluminum Melting Furnace?
Whether you need a portable crucible furnace for aluminum melting or a reliable gas-fired non-ferrous melting furnace, this unit delivers outstanding performance. Its low-NOx burner ensures environmental compliance, while the robust construction and intelligent controls provide years of trouble‑free operation. Ideal for foundries, laboratories, and small‑scale producers looking for a flexible, energy‑efficient, and safe melting solution.