Explanation

The metallic materials used for deoxidation is added into steel liquid or electrode or into coating or welding flux at the later stage of steelmaking. deoxidation can be achieved by adding deoxidation elements or deoxidizer with greater affinity to oxygen than iron into steel liquid and generating oxides or composite oxides that are not melted in steel liquid so as to exclude them from steel liquid. Metals and their alloy with greater chemical affinity to oxygen than iron can be used as deoxidizer. However, in actual production, efficiency and raw material cost should be considered comprehensively, so alloy with low prices are often used. Common block deoxidizer include ferromanganese, ferrosilicon, silicon manganese alloy, aluminum, silicon manganese aluminum alloy, silicon calcium alloy, etc. powder deoxidizer include carbon powder, silicon iron powder, aluminium powder, silicon calcium powder, calcium carbide, etc. Many deoxidizer are also important alloy for adjusting the composition of molten steel. deoxidation is the process of reducing the oxidation of molten metal and removing oxygen from liquid metal. deoxidation with deoxidizer mainly includes precipitation deoxidation and diffusion deoxidation to reduce iron, while deoxidation products float out of liquid metal and enter into slag. diffusion deoxidation is carried out at the interface between liquid metal and slag, which makes the oxygen in steel liquid transfer to diffusion in flooding.

Classification