Furnace slag amount estimation device, furnace slag amount estimation method, and molten steel production method

A furnace slag amount estimation method to be executed by a furnace slag amount estimation device that estimates a slag weight remaining inside a converter in blowing treatment that includes a process of tilting the converter so as to discharge slag in a furnace out of the furnace, the furnace slag amount estimation method comprising:

• an input step of receiving input data including furnace shape data for the converter, data on components and temperatures of molten metal and slag before start of or during the blowing treatment, and slag height data in the furnace of the converter;
• a slag bulk density calculation step of calculating a slag bulk density after the converter is tilted and the slag is discharged, using the input data and a slag bulk density estimation model;
• a slag volume calculation step of calculating a slag volume in the furnace after the converter is tilted and the slag is discharged, using the slag height data after the converter is tilted and the slag is discharged, the furnace shape data, and a slag volume estimation model;
• and
• a slag weight calculation step of calculating the slag weight in the furnace after the converter is tilted and the slag is discharged, using the calculated slag bulk density and the calculated slag volume.