Casting process can be divided into three basic parts, namely casting metal preparation, mold preparation and casting treatment.
Casting metal refers to the metal material used for casting castings in foundry production, it is an alloy composed of a metal element and other metals or non-metallic elements, and is used to be called casting alloy, mainly cast iron, cast steel and cast nonferrous alloy. Metal smelting is not only pure melting, but also the smelting process, so that the casting of metal in the mold, in terms of temperature, chemical composition and purity of the expected requirements. To this end, in the smelting process to control the quality for the purpose of the various inspection tests, liquid metal to meet the specified indicators can be allowed to cast. Sometimes, in order to achieve higher requirements, the metal liquid in the oven after the oven treatment, such as desulfurization, vacuum degassing, furnace refining, inoculation or metamorphic treatment. Smelting metal commonly used equipment have cupola, arc furnace, induction furnace, resistance furnace, reflective furnace, etc.