| 摘要 |
PROBLEM TO BE SOLVED: To stably and efficiently separate and recover phosphorus and iron from a steelmaking slag by performing reduction treatment on the steelmaking slag containing iron and phosphorus in a reaction vessel having a burner.SOLUTION: A recycling method for a steelmaking slag is provided in which the steelmaking slag containing phosphorus generated in a steelmaking refining process is charged together with a reductant into a reaction vessel having a burner to perform a reduction treatment, and the oxides of iron and phosphorus in the steelmaking slag is reduced and recovered as a phosphorus-containing reduced iron from the steelmaking slag. In the method, a steelmaking slag mixture in which the steelmaking slag and a silicon oxide source are premixed is charged into the reaction vessel, and the reduction treatment is performed while controlling the treatment temperature in the reaction vessel and/or a ratio (CO/CO) of CO gas to COgas of the atmospheric gas in the reaction vessel according to the composition of the steelmaking slag mixture. |
