Energy Saving In Steel Factory Based On Material Flow

The modern iron&steel joint enterprise is a complicated iron-coal chemical system, and the steel production process is, in essence, the dynamic operation of the material flow under the drive and effect from energy flow following the definite rules. Analysis on the influencing factors of the energy intensity of An Steel indicates that the research on material flow will benefit the construction of a resource saving and environment-friendly enterprise. Based on the theory of Metallurgical process Engineering and methodology of Systems Energy Conversion, the physical essence of the steel production process is reobserved, and the steel production system is regarded as materials transformation process. The operating behavior and effectiveness of material flow are analyzed in order to find out the new direction of energy conservation in an iron and steel enterprise.The material flow is formed when the material runs along its life cycle trace in an enterprise. The material-flow diagrams for a production unit, a process and a production flow are constructed, the material input-output model is established. The energy flow is formed when the energy runs along the route of conversion, usage, recovery and emission. And theenergy-flow diagrams for a conversion unit, a process, and a network are designed and energy input-output model established.Material flow and energy flow cooperate with each other on a steel production Process are analysed: the energy flow drive the material flow to transform, and surplus energy moves to the next steel production process or departs from the material flow to form an independent conversion network. Some measure can be used to enhance the synergetic effect between material flow and energy flow, so as to reduce the energy intensity of the processes concerned: recovering much more residual heat and energy, bringing much more energy carried by the process to the next process.For a large-sized joint enterprise, An Steel, which produces all sorts of products with complicated network of flow sheet and a medium, the analyzing method of material flow is applied to discuss the influence of the running mode of material flow the energy intensity of the An Steel. It is indicated that the time cycle of material flow running in the network of flow sheets in An Steel is longer, the serialization extent is lower, too. This results in the much higher energy intensity of An Steel. It is also indicated that energy intensity of the joint enterprise, An Steel, can be reduced from 760.2kgce/t to 548.2kgce/t, if taking some optimization measure concerned with material flow and energy flow.