چكيده به لاتين
Steel is one of the strategic materials needed to develop the infrastructure of countries. The global steel production reached 1,675 million tons, and the specific energy for the production 1 ton of steel in the total steel chain is 924 MW. There is a long chain to produce steel, from mining to melting and rolling. In the most advanced method of steel production, there are seven process. Mining, crushing and granulation, beneficiation (concentrate production), pelletizing, direct reduction, casting and rolling. Each of this processes, requires heat or electricity energy. In the final processes of the steel chain, which there is major share of thermal energies, due to the discontinuity of production and sometimes-large distances between industries, huge amount of exergy are lost in cooling and stash of products. The magnitude of this problem for industrial decision makers and designers can be determined by examining the amount of energy wasted due to chain discontinuity. The effect of eliminating distances and time interruptions from mining to casting and continuous production of steel on the special energy consumption of steel production and exergy efficiency of this industry can help Iran steel production be competitive at the global level. According to the results of this study, by eliminating the distances between the seven processes of steel production, the specific energy consumption of production is reduced by 11.2% and equivalent to 1957 Gj/ton. In addition, the amount of this saving is equal to 12,218,122 GJ/year by considering the effects of continuous production on the reliability of steel production and eliminating these effects by stash the product of each process, according to the number of days available to save energy. The final price of steel production with this model will be reduced by 1.756 Euros/ton, which can have economic savings of 8.78 million Euros per year, considering the current production of 5 million tons per year by Gol Gohar industrial zone.
