Scenario analysis based on the decomposition model of energy consumption index in a steel plant

On the basis of the decomposition model of energy consumption index,the energy consumption per ton steel in main processes was forecasted and analyzed by using scenario analysis.In order to evaluate the energy consumption of a domestic steel plant in 2009 and 2012,scenarios which respectively considered feasible lowest process energy consumption(FLPEC),feasible and possible waste heat reusing technologies were built.In the feasible scenario,only the waste heat of high-temperature flue gas in sintering,hot and cool-rolling processes was recoverable,while the heat recovery of flue gas and solid in every process was considered in the possible scenario.Through comparing these scenarios,it is concluded that the energy saving effect of the FLPEC scenario is the best,and the feasible technologies have little effect while the possible technologies can reduce energy consumption significantly.Finally,some suggestions for further energy saving work are proposed,such as applying advanced preheating technologies in electric arc furnaces,developing high-temperature solid heat recovery technologies and improving the waste heat recovery in rolling process.