Hot metal temperature control method, hot metal temperature control device, hot metal temperature control system, and terminal device

A hot metal temperature control device comprising:

• a calculation unit configured to calculate a pulverized coal ratio manipulation amount by hot metal temperature control so that a hot metal temperature predicted by a transient model capable of calculating a state inside a blast furnace falls within a preset target range, calculate a pulverized coal injection flow rate manipulation amount by pulverized coal ratio tracking control to compensate for a deviation between a target value of a pulverized coal ratio taking into account the pulverized coal ratio manipulation amount and a current actual value of the pulverized coal ratio, and prioritize the hot metal temperature control or the pulverized coal ratio tracking control as an optimal action based on a magnitude of discrepancy between the target value and the actual value of the pulverized coal ratio;
• a determination unit configured to determine a rationale for calculation of the optimal action and add a text statement to a rationale statement indicating the rationale;
• and
• a presentation unit configured to present operation information including the rationale statement and at least one of the pulverized coal ratio manipulation amount and the pulverized coal injection flow rate manipulation amount calculated as the optimal action.

A hot metal temperature control system comprising:

• a hot metal temperature control device and a terminal device;
• a calculation unit configured to calculate a pulverized coal ratio manipulation amount by hot metal temperature control so that a hot metal temperature predicted by a transient model capable of calculating a state inside a blast furnace falls within a preset target range, calculate a pulverized coal injection flow rate manipulation amount by pulverized coal ratio tracking control to compensate for a deviation between a target value of a pulverized coal ratio taking into account the pulverized coal ratio manipulation amount and a current actual value of the pulverized coal ratio, and prioritize the hot metal temperature control or the pulverized coal ratio tracking control as an optimal action based on a magnitude of discrepancy between the target value and the actual value of the pulverized coal ratio;
• a determination unit configured to determine a rationale for calculation of the optimal action and add a text statement to a rationale statement indicating the rationale;
• and
• an output interface configured to output operation information including the rationale statement and at least one of the pulverized coal ratio manipulation amount and the pulverized coal injection flow rate manipulation amount calculated as the optimal action;
• a communication unit configured to transmit and receive the operation information;
• an acquisition unit configured to acquire the optimal action and the operation information related to the optimal action including the rationale statement;
• a display unit configured to display the acquired optimal action and the operation information so as to include the rationale statement;
• and
• an interface unit configured to receive an instruction for the displayed operation information and output a set value for an operational variable in response to the instruction or based on elapse of a predetermined time.

A terminal device configuring a hot metal temperature control system together with a hot metal temperature control device that outputs operation information, for controlling hot metal temperature, including at least one of a pulverized coal ratio manipulation amount and a pulverized coal injection flow rate manipulation amount calculated as an optimal action based on a magnitude of discrepancy between a target value of a pulverized coal ratio and an actual value of the pulverized coal ratio, and including a rationale statement indicating a rationale for calculation of the optimal action, the terminal device comprising:

• an acquisition unit configured to acquire the optimal action and the operation information related to the optimal action including the rationale statement;
• a display unit configured to display the acquired optimal action and the operation information so as to include the rationale statement;
• and
• an interface unit configured to receive an instruction for the displayed operation information and output a set value for an operational variable in response to the instruction or based on elapse of a predetermined time.