The act or process of reducing from the state of an oxide.
Elimination of oxygen in liquid steel, usually by introduction of aluminum or silicon or other suitable element. This term is also used to denote reduction of surface scale (iron oxide).
The practice of adding elements to liquid steel before it is cast to reduce and control the level of dissolved oxygen in the liquid and therefore to control the amount of carbon monoxide evolved during solidification. Elements added for this purpose are Mn, Si and Al. Modern casting practice requires the complete removal of gaseous oxygen before casting commences; this steel is 'fully killed'.
process to remove or tie up oxygen molecules in molten steel production
A process used during melting and refining of steel to remove and/or chemically combine oxygen from the molten steel to prevent porosity in the steel when it is solidified.
Elements such as silicon and aluminum when added to molten steel react to form stable oxides and reduce the amount of dissolved oxygen. The solubility of oxygen in steel is reduced as temperature is lowered during solidification and the excess oxygen combines to form carbon monoxide. If the molten metal is not deoxidized the effervescence produced by the evolution of carbon monoxide during solidification would result in blow holes and porosity. Steel treated in this way is termed, "Killed Steel".
