CONVEYANCE CONTAINER ALLOCATING PLAN CREATING METHOD, CONVEYANCE CONTAINER ALLOCATING PLAN CREATING DEVICE, AND OPERATION METHOD FOR STEEL PLANT

• Main Author: NAKATSUJI KAZUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 29.11.2018
• Subjects: CALCULATING; CHEMISTRY; COMPUTING; CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; COUNTING; DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; METALLURGY; METALLURGY OF IRON; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; REGULATING; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS

PROBLEM TO BE SOLVED: To enable efficient allocation of conveyance containers to processing units of a batch process without requiring adjustment of parameters affecting the level of an optimum solution.SOLUTION: In a molten steel ladle allocating plan creating method for creating a plan to allocate a molten steel ladle to steel tapping charge, a molten steel ladle allocation route showing whether each molten steel ladle is allocated to steel tapping charge is prepared, and a molten steel ladle allocation route that satisfies the constraints that can be considered alone for each molten steel ladle is listed for each molten steel ladle (step S2), a mathematical model including an objective function for minimizing the quantity of molten steel ladles to be used and constraints to be considered among a plurality of molten steel ladles is created (step S3), a plurality of optimal solutions which satisfy the constraints of the mathematical model and which select, for each molten steel ladle, the molten steel ladle allocation route for which the objective function is the minimum is output (step S4), a value of a weighted linear sum of quantified evaluation criteria is calculated for the plurality of optimal solutions, and the optimal solution of a best value is output as a final solution (step S6).SELECTED DRAWING: Figure 9 【課題】最適解のレベルを左右するパラメータの調整を必要とせずにバッチプロセスの処理単位に搬送容器を効率よく引き当てることを可能にすること。【解決手段】出鋼チャージに溶鋼鍋を引き当てる計画を作成する溶鋼鍋引当計画作成方法において、各溶鋼鍋に対して出鋼チャージに引き当てるか否かを表した溶鋼鍋引当ルートを作成するとともに、各溶鋼鍋単独で考慮可能な制約を充足する溶鋼鍋引当ルートを溶鋼鍋毎に列挙し（ステップＳ２）、使用する溶鋼鍋数の最小化の目的関数と複数の溶鋼鍋間で考慮が必要な制約とを含む数理モデルを作成し（ステップＳ３）、数理モデルの制約を充足し、かつ目的関数が最小となる溶鋼鍋引当ルートを溶鋼鍋毎に選択した複数の最適解を出力し（ステップＳ４）、その複数の最適解について、定量化された評価基準の重み付き線形和の値を計算し、最良となる値の最適解を最終解として出力する（ステップＳ６）。【選択図】図９