Natural Gas Regenerative Furnace 20 Tons Aluminum Smelting Unit
Natural Gas Regenerative Aluminum Melting Furnace 20 Tons
Description
This 20-ton aluminum smelting unit is a reflective flame furnace engineered for melting, homogenizing and holding various aluminum alloys. Designed as a stationary rectangular model fitted with a tilting access door, it features a standard 630mm thick insulated furnace wall combined with a semi-monolithic cast lining structure, alongside an energy-efficient regenerative combustion system running on natural gas.
Parameters
| Furnace Form | Stationary rectangular smelting furnace |
| Inner Lining Construction | Integrated top casting + partial cast composite lining |
| Rated Loading Capacity | 20T |
| Overall Furnace Outer Dimensions | 5500x5500mm |
| Main Shell Steel Plate Thickness | 160+6mm |
| Total Insulation & Refractory Wall Thickness | 630mm |
| Standard Static Depth of Molten Aluminum | 650mm |
| Feeding Port Style | Inclined furnace mouth |
| Charging Opening Outer Dimensions | 2600x1400mm |
| Sill Width of Furnace Charging Gate | 500mm |
| Vertical Pillar Width for Charging Port | 500mm |
| Gate Lifting Configuration | Motor with weight balancing |
| Gate Sealing Mechanism | Gravity self-compression locking design |
| Applicable Power Supply | 380V/ 220V |
| Compatible Aluminum Alloy Grades | 1-8 series |
| Allowable Operating Temperature Range for Molten Bath | 1000-1200 |
| Design Fuel Source | Natrual gas |
| Fuel heat value requirement | >8400 kcal, offer pressure 0.08-0.1Mpa. Furnace mouth natural gas pipe: DN80. Max. Flowage 350Nm³/H |
| Combustion Equipment Model | Regenrative type burner |
| Burner quantity | 2 guns |
| Nominal Melting Efficiency | 4-6 tons/hour |
| Benchmark Gas Consumption During Melting Stage | 65 m³/ton |
| Maximum Allowable Surface Temp of Furnace Shell | ≤ ambient temperature +35℃ |
| Except for the parts of the mouth, around the furnace door, the surface of the flue, the opening of each monitoring point, the water outlet, except for increasing the intensity of the furnace shell | |
| Aluminum emissions | Outlet brick with fibrous sleeve |
| Out of aluminum liquid mouth height | 690mm higher than base |
| Aluminum liquid outlet flowage | ≥800kg /minute |
FAQ
How to choose between regenerative and direct fired natural gas aluminum melting furnaces?
1) Thermal storage type: equipped with dual thermal storage burners, recovering waste heat from flue gas to preheat the air, with a solar term of 20%~30% and a thermal efficiency of over 75%. It is suitable for large furnaces of more than 3 tons and 24-hour continuous casting of rods for mass production, saving gas costs in long-term production;
2) Direct fired type: With a simple structure, low procurement price, and simple maintenance, it is suitable for small furnaces weighing 1-3 tons, intermittent production, and small factories with less recycled materials;
Priority is given to recommending thermal storage products for long-term mass production projects exported overseas.
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