Intelligent Control System of BOF Steelmaking
0n the basis of analyzing BOF steelmaking characteristics, a prediction model and control model based on neural network were established. Taking endpoint temperature and endpoint carbon content as control target, oxygen-blown volume and added coolant were calculated, then endpoint control of convert steelmaking was realized. Simulation results show that the simulation result of endpoint temperature and carbon content are satisfying and control strategy is very effective. The application results demonstrate the efficiency of the method.
Endpoint Prediction of Basic Oxygen Furnace Steelmaking Based on Gradient of Relative Decarburization Rate
The contribution deals with the proposal and verification of the endpoint prediction of the basic oxygen furnace steelmaking based on a gradient of relative decarburization rate. The paper briefly describes the steelmaking process in the basic oxygen furnace and the decarburization process. Next, it is proposed to identify the relative decarburization rate and use its gradient to predict the endpoint of the steelmaking process. The algorithm and required inputs are designed and described. Finally, the results of the verification of the prediction of the endpoint of the steelmaking process are presented and analyzed.
GHz microwave permeability of CoFeZr amorphous materials synthesized by two-step mechanical alloying
Abstract CoFeZr amorphous magnetic materials prepared by mechanical alloying (MA) were investigated. Microstructures of the CoFeZr alloys were analyzed by XRD and their morphology observed by SEM. The results show that the characteristics of the amorphous materials mainly depend on MA conditions and alloys composition. By a two-step MA process, micron or sub-micron flake-like CoFeZr amorphous materials with narrow size distribution range and regular morphology were obtained. Microwave permeability of these alloys was further measured by an Agilent 8722ES Vector Network Analyzer. The maximum values of μ ′ and μ ″ at 2 GHz were 4.26 and 4.22, respectively. Thus these novel materials could be used for microwave absorbers operating in the several GHz range.