On Relationships Among Iron Resource Efficiency,Environment Efficiency and Steel Scrap Index

The three indices of steel manufacturing process are given,i.e. iron resource efficiency,iron environment efficiency and steel scrap index,to define the degree of saving nature iron resources,environmental condition and availability of steel scrap for steel manufacturing process respectively. Based on the conservation of mass,relationship among the iron resource efficiency,environment efficiency and steel scrap index was formulated. When steel scrap index is certain,the higher the iron environment efficiency of the steel manufacturing process,the higher will be its iron resource efficiency. And the maximum value of iron resource efficiency is determined too. Taking the data of a steel manufacturing process as example,analyzing the influence of steel scrap index in the steel manufacturing process on the relation curve between iron resource efficiency and iron environment efficiency. It is pointed out that steel scrap index of BF-BOF process is not improved to some extent,and its iron resource efficiency and iron environment efficiency are not improved to some extent too. To improve the situation,it is necessary to develop EAF process.