Aluminum Melting and Holding Furnace, Die Casting Process of Aluminum
1.General Introduction
The aluminum alloy melting and holding furnace has a compact
structure for both melting and holding aluminum liquid. The melting
chamber is formed by once-forming castable material, which has a
high strength and a long service life. The aluminum die casting furnace
is equipped with famous brand burner, which has functions of automatic
ignition and temperature control. The industrial metal melting furnace
also has an over-temperature alarm device.
2.Technical Parameters
| model | WDL-RJL-750 |
| quantity | 1 set |
| melting rate | 750kg/hour (continuous working manner, and rated working conditions met); holding chamber capacity 2250kg |
| fuel | natural gas; air supply pressure 5-7kPA |
| working temperature |
700-750℃ heating up rate about 60-80℃ per hour |
| Natural gas consumption | about 65-70m3/ton aluminum(at rated working conditions) |
| high pressure air | 0.5～0.7Mpa 1.5M3/h (dry compressed air, oil and water separated) |
| power supply | 380V 50HZ 5.5kW |
| rated working | conditions |
a) the content of the scale in the raw material is less than 5%, especially there is no
easily oxidized scales.
b) the melting material ratio: 50% recycled material, 50% aluminum ingot;
c) The furnace works in a continuous manner. The melting temperature is set at 720℃.
d) The fuel consumption is calculated based on 3 hours of consumption in a continuous
working manner.
e) natural gas heat value: 8600Kcal/m3;
f) The productivity is calculated based on the precondition that the furnace is charged
with 750kg/hour raw material, and aluminum liquid is discharged with a rate of 750kg/hour.
g) Melting loss rate of aluminum liquid is less than 1.5%.
3. Raw Material for Melting
a) aluminum ingot (average weight is below 8kg);
filling rate of melting chamber: 50% (the packing strap must be untied and the
ingot must be dispersed into the furnace);
b) recycled material (the size must be smaller than the charging cart)
filling rate of melting chamber : 50%;
4.Furnace Structure
4.1 The furnace shell is fabricated from steel plates and sectional steel. It has enough
strength and has preserved the space for expansion.
4.2 Aluminum outlet (pneumatic cylinder plug type)
The aluminum liquid is let out through a discharge chute to the follow up equipment.
There is a manual change-over valve, and the liquid outlet is opened or closed through
control of the pneumatic cylinder. (The liquid plug is consumptive parts.)
4.3 Slag gate and its spot inspection and cleaning gate
The door frame around the door body of each furnace door is made of cast iron,
the door surface is made of ordinary steel plate, and the refractory material inside
the door is made of insulating board and high temperature castable.
4.4 Charging hole cover
The frame of the feeding cover is made of ordinary steel plate, and the inside of
the cover is built with heat preservation board + high temperature castable. The
opening and closing of the top cover are driven by the cylinder.
4.5 Refractory lining
| Structure | The first layer | The second layer | The third layer | The fourth layer | |
|
Holding Chamber |
Bottom, top, door, furnace body |
Impermeable castable; High density and high aluminum brick Heat resistant clay brick; Heat resistant castable;
|
Mullite insulation brick; Super insulated ceramic fiberboard; Heat preservation material; Super board; |
Heat resistant castable ; Impermeable castable; Super insulated ceramic fiberboard; |
Nano insulation board; |
| Melting chamber and charging tower |
Charging tower; Burner surrounding area; tilting furnce bed; furnace cover; |
Refractory clay brick (Opposite the charging port); Super high strength castable; |
Ceramic fiberboard; Insulation concrete; refractory clay brick; |
Insulating ceramic fiberboard; |
Nano insulation board; |
Notes: In order to prevent the generation of oxide in the aluminum smelting furnace
and extend the service life of refractory, in addition to daily slag cleaning, please shut
down the aluminum melting and holding furnace every 6 months to clean the oxide in the furnace.
4.6 hydraulic tilting system
The furnace body is designed with tilting function. It is mainly comprised of the hydraulic cylinder,
control valves, and pipeline.
Aluminum Melting and Holding Furnace in our factory:
