Refining process control device and refining process control method

A refining process control device comprising:

• a model calculation unit configured to acquire, as input information, a performance value of a refining process condition in a refining facility, a measurement result of a temperature and a component concentration of a molten metal in the refining facility, measurement results related to a refining facility, including a flow rate of an exhaust gas discharged from the refining facility and a component concentration in the exhaust gas, and a result of an immediately preceding refining process in the refining facility, and calculates a reaction amount and a state amount in the refining facility during the refining process using the acquired input information;
• a refining process evaluation calculation unit configured to calculate, using a weighted sum over at least one deviation of an actual molten metal component from a target molten metal component, an evaluation value of the refining process using the input information acquired by the model calculation unit or past input information, wherein the actual molten metal component includes a plurality of elemental components including C, Si, Mn and P;
• a refining performance database configured to store the input information acquired by the model calculation unit, the reaction amount and the state amount calculated by the model calculation unit, and the evaluation value calculated by the refining process evaluation calculation unit;
• a past similar performance extraction unit configured to extract, from the refining performance database, a performance value of a past refining process in which a refining condition being a refining process condition acquired before the start of the refining process and including a result of an immediately preceding refining process in the refining facility, is similar to a refining process condition as a calculation target and the evaluation value is the lowest or a plurality of top performances;
• and
• an operation amount determination unit configured to
• determine an initial operation amount at the start of a refining process based on the performance value of the past refining process extracted by the past similar performance extraction unit, and
• determine an operation amount based on a change amount of the initial operation amount after the start of the refining process.