| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for adjusting a component concentration of a molten metal and a temperature of the molten metal, which copes with the improvement of the controllability and adequacy of the target temperature, and a direct-tapping operation. SOLUTION: The method for adjusting the component concentration of the molten metal and the temperature of the molten metal includes: calculating the target temperature based on a delayed state of the subsequent step; obtaining the temperature of the molten metal and the component concentration of the molten metal by measuring or predicting them; setting an expression that expresses a relation between supply and demand, which is formulated from the obtained concentration of the component, the target concentration of the component, the composition of each set additive and the charging quantities of each additive to be determined, an expression that expresses a relation among a heat loss due to the charge of the additives, a heat loss associated with tapping and an allowable value of the temperature change, which is formulated from the temperature of the obtained molten metal, the target temperature, temperature properties of each set additive and the charging quantities of each additive to be determined, and the maximum and minimum charging quantities of each additive, as restrictive conditions; determining the additives to be charged and the charging quantities, based on a mathematical programming by using objective functions which minimize the cost of each additive and bring the temperature of the molten metal after the additive has been charged close to the target temperature; and charging the additives. COPYRIGHT: (C)2011,JPO&INPIT |
