Simply melt aluminum

Due to the relatively low melting temperature of aluminum, it is quite feasible to cast the light metal itself. However, this requires the right equipment for casting and safety. Below we have put together for you what you need for melting aluminum.

The melting point of aluminum varies

Aluminum is a light metal which has a relatively low melting point for metal. This is given as 660 degrees Celsius. However, the actual melting point of your aluminum may differ because the alloy is also critical. Most aluminum alloys have a melting point between 580 and 680 degrees.

The release of hydrogen when heating the Alus

In addition, when melting aluminum, take into account that the heating causes hydrogen. Particularly when improperly handled, when casting aluminum, it looks like it literally looks as if the liquid and at the same time solidifying aluminum would explode from the inside out.

In addition, there are toxic gases

It can splash up half a meter and more in large quantities. There is enormous health risk from burns. In addition, you should not underestimate the fact that toxic fumes are produced during molten aluminum. So melt the aluminum in a well-ventilated room or outdoors.

You should not do this when melting aluminum

Again and again, the melting of aluminum shows how careless and naive the process is. The release of hydrogen we have already mentioned. The use of a simple coal fire is not uncommon. The embers are then blown on a hair dryer or other device vigorously, so that great heat.

Melt aluminum with a controllable melting furnace

Of course, this is necessary when casting aluminum. But not uncontrolled. Therefore you should have a smelting furnace where you can precisely control the temperature. This will then set the temperature to a maximum of 750 degrees.

Melting is usually followed by casting. Also on the Internet there are "instructions", which are even handled with plaster molds. These fires in seconds and almost explosively, if you are unlucky. The use of plaster molds is therefore not recommended.

Procedure for aluminum melting and casting

Instead, you also need suitable material here. For aluminum castings oily sand is very suitable. In addition, you also need a release agent and the two forms for the molding sand. For the mold, a polystyrene mold or a wax mold is made for individual parts. Both are simply burned out during casting, so they can only be used once.

Accessories for melting aluminum

To melt the aluminum you need the following components:

  • Melting furnace, temperature exactly adjustable
  • Crucible for melting steel, thick-walled
  • a device for carrying and pouring the crucible
  • Salt for binding the slag

Accessories for casting aluminum

In addition there is the casting accessories:

  • Shapes for the sand
  • molding sand
  • Positive form for burnout
  • Talc as a release agent
  • conical wood cones, suitable for positive mold for sprue and riser

The sprue opening is used to fill the liquid aluminum. Here, the aluminum is filled evenly until it emerges from the riser.

Safety equipment for melting and casting aluminum

Now you also need safety equipment

  • Protective mask, optimal would be a welder mask or welding helmet
  • Leather gloves like the welder
  • Leather cloak like the welder
  • Work clothes, non-flammable
  • Work shoes, non-flammable

The melting of the aluminum

Now preheat your smelting furnace. Set the temperature to 750 degrees. Fill the crucible with aluminum and place it in the melting furnace. Now you have to wait until the oven has reached the temperature and the aluminum is liquid. Before pouring, sprinkle a spoonful of salt over the molten aluminum to bind the slag. Now you can start casting the aluminum.

Tips & Tricks

You can find out in detail and in detail what should be considered when casting aluminum.

Video Board: Very Simple Aluminum Furnace