A hybrid neural network model,in which RH process(theoretical)model is combined organically with neural network(NN)and case-base reasoning(CBR),was established.The CBR method was used to select the operation mode and ...A hybrid neural network model,in which RH process(theoretical)model is combined organically with neural network(NN)and case-base reasoning(CBR),was established.The CBR method was used to select the operation mode and the RH operational guide parameters for different steel grades according to the initial conditions of molten steel,and a three-layer BP neural network was adopted to deal with nonlinear factors for improving and compensating the limitations of technological model for RH process control and end-point prediction.It was verified that the hybrid neural network is effective for improving the precision and calculation efficiency of the model.展开更多
The first imported off-gas analysis system on 150 t BOF at Benxi Plates Co.Ltd. is presented and the continuous determination of bath carbon content has been studied. Thecomparison between the whole-course carbon inte...The first imported off-gas analysis system on 150 t BOF at Benxi Plates Co.Ltd. is presented and the continuous determination of bath carbon content has been studied. Thecomparison between the whole-course carbon integral model and the end-point carbon prediction modelhas been made. The results show that the regular change of CO, CO_2 and N_2 content in the off-gasduring blowing plays an important role in judging the smelting end-point of converter; the cubiccurve fitting model has a higher hit rate over 95 percent for the heats whose end-point carboncontent is lower than 0.10 percent with a precision of +-0.02 percent and has a large error for theheats whose end-point carbon content is more than 0.15 percent.展开更多
Self-fluxing iron ore concentrates containing coal have good microwave Absorbability. With the voluminal heating property of microwave, the concentrates can be reduced uniformly and swiftly. The metallized semi-produc...Self-fluxing iron ore concentrates containing coal have good microwave Absorbability. With the voluminal heating property of microwave, the concentrates can be reduced uniformly and swiftly. The metallized semi-product can be directly charged into electric furnace for making clean steel. The total consumed energy of overall route is about 20 98 GJ.展开更多
基金Item Sponsored by National Natural Science Foundation of China(50074026)
文摘A hybrid neural network model,in which RH process(theoretical)model is combined organically with neural network(NN)and case-base reasoning(CBR),was established.The CBR method was used to select the operation mode and the RH operational guide parameters for different steel grades according to the initial conditions of molten steel,and a three-layer BP neural network was adopted to deal with nonlinear factors for improving and compensating the limitations of technological model for RH process control and end-point prediction.It was verified that the hybrid neural network is effective for improving the precision and calculation efficiency of the model.
文摘The first imported off-gas analysis system on 150 t BOF at Benxi Plates Co.Ltd. is presented and the continuous determination of bath carbon content has been studied. Thecomparison between the whole-course carbon integral model and the end-point carbon prediction modelhas been made. The results show that the regular change of CO, CO_2 and N_2 content in the off-gasduring blowing plays an important role in judging the smelting end-point of converter; the cubiccurve fitting model has a higher hit rate over 95 percent for the heats whose end-point carboncontent is lower than 0.10 percent with a precision of +-0.02 percent and has a large error for theheats whose end-point carbon content is more than 0.15 percent.
文摘Self-fluxing iron ore concentrates containing coal have good microwave Absorbability. With the voluminal heating property of microwave, the concentrates can be reduced uniformly and swiftly. The metallized semi-product can be directly charged into electric furnace for making clean steel. The total consumed energy of overall route is about 20 98 GJ.
