Constructal theory and finite time thermodynamics are introduced into generalized constructal optimization of a converter steelmaking procedure (CSMP) in this paper. A complex function considering molten steel yield (MSY) and useful energy (UE) is taken as the optimization objective. The total raw material cost (TRMC) is fixed. The optimal raw material cost distribution is obtained. The influences of hot metal composition contents, hot metal temperature, steel slag basicity, and price ratio of the waste steel to sinter ore on the optimal performance are analyzed. After optimization, the complex function, the MSY and the UE are improved by 2.67, 2.21 and 3.12%, respectively. Obviously, the performance of the CSMP is improved in certain degree. Decreasing the contents of silicon, phosphorus, manganese and price ratio of the waste steel to sinter ore and increasing the steel slag basicity properly increase complex function. Furthermore, the MCF reaches its twice maximum by optimizing hot metal temperature, the pressure ratio and the relative pressure drop.
Arabian Journal for Science and Engineering – Springer Journals
Published: May 31, 2018
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