Lances are used in steel industry for argon rinsing stations, Desulphurisation of hot metal and oxygen lancing for temperature control of hot metal and to make homogenous clean steel. We manufacture ULCC-based monolithic lances for various operating conditions, such as monolithic rinsing lances for argon and nitrogen bubbling in the steel and oxygen blowing in steel treatment process.
The Electric Arc Furnace (EAF) is a vessel where steel is produced by electro fusion arcing with the help of graphite electrodes. Operating as a batch melting process, the charge materials used for melting are steel scraps, sponge iron, DRI and other such materials, either alone or in combination.
Refractories used in this vessel are exposed to high temperatures which are most severe in the hot spot zones. Thus, refractories for this vessel should have high oxidation resistance, erosion and thermal shock resistance; and the charge pad area should have high impact resistance to withstand the impact of steel scraps fed to the furnace.
There are two types of Electric Arc Furnace (EAF) designs based on Tapping Device:
A Basic Oxygen Furnace acts as a primary steel making process for converting the molten pig iron to steel, by blowing oxygen through a lance. This causes an exothermic reaction by which Oxygen reduces Carbon, Silicon and Manganese etc. present in steel. Further, Lime (CaO) is added in the refining process to remove silicate as slag; and finally Carbon gets reduced to the extent of 0.2%. Refractories lined in this vessel undergo various destructive factors like oxidation and various thermo-mechanical stresses.