Analysis method of influence of iron steel ratio change on comprehensive energy consumption per ton of steel
HAN Jing1, DU Bin2
1. Department of Energy and Environmental Protection, China Baowu Steel Group Co., Ltd., Shanghai 200126, China; 2. Shanghai Baosteel Energy and Environment Technology Co., Ltd., Shanghai 201999, China
Abstract：In the context of carbon peak and neutralization,increasing the proportion of scrap consumption and reducing the iron/steel ratio can directly affect the decline of comprehensive energy consumption per ton of steel in iron and steel enterprises. Reducing the iron/steel ratio is an effective way to improve energy efficiency,save energy and reduce carbon in China's iron and steel enterprises based on integrated iron and steel route production,which has become a research hotspot in the iron and steel industry. The main ways and corresponding technical measures to reduce the iron/steel ratio,such as reducing the heat loss of molten iron,increasing the temperature of scrap entering the furnace and reducing the tapping temperature of converter,are briefly analyzed from the point of view of heat balance. In order to completely and quantitatively analyze the impact of the change of iron/steel ratio on the comprehensive energy consumption per ton of steel in iron and steel enterprises,based on the system energy saving in iron and steel enterprises,this paper adds the impact of the recovery of residual energy per ton of steel caused by the change of iron/steel ratio on the comprehensive energy consumption per ton of steel on the basis of the change of iron/steel ratio,and puts forward the quantitative analysis method of the impact of the change of iron/steel ratio on the energy consumption of integrated iron and steel route enterprises. Finally,taking the actual data of several iron and steel enterprises as an example,the quantitative analysis is carried out. Under the condition of this case,the iron/steel ratio is reduced from 0.950 in the benchmark period to 0.790 in the statistical period. The changes of the steel ratio coefficient in the pre iron process,the energy consumption in the steelmaking process and the recovery of residual energy per ton of steel affect the comprehensive energy consumption per ton of steel by -71.282 kgce/t,-1.000 kgce/t and 9.687 kgce/t respectively,and the total comprehensive energy consumption per ton of steel is reduced by 62.595 kgce/t. The quantitative analysis of the case shows that the comprehensive energy consumption per ton of steel decreases by 3.912 kgce/t for every 0.01 reduction of iron/steel ratio. The decline of iron/steel ratio can significantly improve the performance of comprehensive energy consumption per ton of steel in integrated iron and steel route enterprises.
韩晶, 杜滨. 铁钢比变化对吨钢综合能耗影响分析方法[J]. 钢铁, 2022, 57(10): 188-194.
HAN Jing, DU Bin. Analysis method of influence of iron steel ratio change on comprehensive energy consumption per ton of steel[J]. Iron and Steel, 2022, 57(10): 188-194.
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2022, Vol. 57 
