METHOD FOR ADDING ADDITIVE TO MOLTEN METAL

PURPOSE:To shorten the time for charging additives and to deposit the additives regularly in a layer state into a ladle by depositing the respective additives in the layer state in a charging hopper and opening the bottom thereof to supply the additives into the ladle. CONSTITUTION:Shutters 17a-19a of respective housing hoppers 17-19 are actuated to deposit the respective additives (a), (b), (c) onto a belt conveyor 16. After the charging hopper 14 is moved to the position below an ejection port 16a of the conveyor 16, the conveyor 16 is actuated to supply the respective additives (a), (b), (c) into the hopper 14. The additives (a), (b), (c) are successively deposited in the layer state in the hopper 14 from the lower part toward the upper part. The hopper 14 is then moved to the position above a small chamber 13 of the ladle 13 coming to a tap hole 19a, where the shutter 14 is opened to drop the additives (a)-(c) in the hopper 14 by gravity into the chamber 13 in the order of the deposition. The additives in the hopper 14 are thereby successively and continuously dropped so that the additives (a)-(c) are successively deposited in the layer state from the lower to the upper part in the chamber 13. A melting furnace 10 is then actuated to incline and to feed the molten metal into the ladle 12.