| Abstract Scope |
"Carry-over slag" refers to steelmaking slag that is transferred to the steel ladle when tapping a steelmaking vessel (electric arc furnace or oxygen converter). Carry-over slag is oxidizing, causing consumption of deoxidizer (such as aluminum) during ladle processing, and leading to phosphorus reversion to the steel. In principle, mass balances based on the concentrations of several elements - phosphorus, manganese, and aluminum - could be used to assess the amount of carry-over slag. In this work, steel and slag compositions and the amounts of additions during tap were used to estimate the carry-over slag mass, using data from a large number of heats. It is concluded that - for aluminum-killed steel - an aluminum mass balance gives the most reliable estimate. |