The use of the furnace depends on the raw material. As an example, upon using aluminium engine blocks, the method used in our factory is the de-ironing melting furnace to remove iron, dross and ash. In the second stage, the liquid material moves to the holding furnace via a canal with filters. A chemical treatment can be used in this stage after mixing the liquid by a metal mixer and pumping nitrogen according to the alloy requirements. A sample is taken and analyzed by the spectrometer. Then, the liquid moves to the casting machine.
For other alloys free from iron attachment, other types of furnaces are used such as rotary furnaces, induction furnaces, and melting pots.