Metallurgical industry is the metal mineral exploration, mining, smelting, selection, and rolling industrial sectors.It is an important industrial raw materials sector that includes black metallurgy industry and nonferrous metallurgy industry . Major methods of metallurgical technology:
Pyrometallurgical smelting process is under the condition of high temperature.
Hydrometallurgy process  in solution.
Electrometallurgy is to extract metal with electric energy.
The security problem of metallurgy industry should be took seriously