End Point Control Method of Argon–Oxygen Refining Low-Carbon Ferrochrome Based on Inference Control

2012 ◽  
Vol 15 (1) ◽  
pp. 233-237
Author(s):  
Ma Haitao ◽  
You Wen ◽  
Han Shunjie
Keyword(s):  
Control Method ◽  
Low Carbon ◽  
Inference Control ◽  
End Point ◽  
Carbon Ferrochrome ◽  
Point Control

The End-Point Ingredient Prediction of Low Carbon Ferrochrome Smelt Based on the Working Condition

2011 ◽  
Vol 128-129 ◽  
pp. 1246-1249
Author(s):  
Niao Na Zhang ◽  
Ke Wei Liu ◽  
Bao Dong Zhang
Keyword(s):  
Working Conditions ◽  
Information Fusion ◽  
Working Condition ◽  
Bayesian Classifier ◽  
Support Vector ◽  
Low Carbon ◽  
Multi Scale ◽  
End Point ◽  
Prediction Result ◽  
Carbon Ferrochrome

Construct the model of the end-point ingredient prediction of low carbon ferrochrome smelt based on the working condition of electrothermal silicon method using the method of multi-scale support vector machiness information fusion, where the best decomposition scale information is according to different smelt working conditions using Levenberg-Marquart algorithm to optimize the design, smelt working condition is judged by Bayesian classifier. Researches have proved that this method can improve the precision of prediction and make the prediction result more accurate, reasonable and practical.

End-Point Control of Holding Phase Based on Cavity Pressure for Injection Molding

2011 ◽  
Vol 221 ◽  
pp. 333-337
Author(s):  
Jian Wang ◽  
Peng Cheng Xie ◽  
Wei Min Yang
Keyword(s):  
Injection Molding ◽  
Control Method ◽  
Holding Time ◽  
Control Mode ◽  
Cavity Pressure ◽  
End Point ◽  
Sensor Position ◽  
Molded Parts ◽  
Point Control

While the switchover from filling to packing is particularly crucial during injection molding, the transfers from holding to screw recovery also significantly affects the quality of molded parts. In this study, the end-point control of the holding phase based on cavity pressure was presented. It was compared with the traditional control method by holding time. The purpose of this study was to validate the feasibility of the end-point control of holding phase by cavity pressure, and to examine its consistency. The weight of the molded parts served as the main measure to probe the process’s capabilities. The results of the verification experiments revealed that the end-point control mode based on cavity pressure could yield better consistency of part weight than the traditional control method by holding time, however, the benefits were not significant. The trigger value of cavity pressure and sensor position should be considered for achieving such high process capabilities.

scholarly journals A nonlinear prediction model, incorporating mass transfer theory and expert rules, for refining low-carbon ferrochrome

2020 ◽  
Vol 120 (12) ◽  
Author(s):  
C -J. Guan ◽  
W. You
Keyword(s):  
Mass Transfer ◽  
Prediction Model ◽  
Nonlinear Model ◽  
Low Carbon ◽  
Nonlinear Prediction ◽  
Transfer Theory ◽  
End Point ◽  
Carbon Ferrochrome ◽  
Mass Transfer Theory ◽  
Main Components

SYNOPSIS We present an optimal oxygen-blowing system with expert rules to improve the efficiency of refining low-carbon ferrochrome. A nonlinear model based on mass transfer theory, the principles of heat transfer, and the principles of high-temperature chemical reactions for refining low-carbon ferrochrome are established. The model is mainly used to control the oxygen supply rate during argon-oxygen top-bottom double-blown refining, thereby controlling the refining temperature and reducing the carbon content. Twenty production tests using a 5 t argon-oxygen refining furnace demonstrate the effectiveness of the system and reliability of the nonlinear model. A comparison of the model data with the experimental data shows that although the model fails to predict the silicon content in the final refined product, it can predict the contents of the main components at the refining end-point and the refining temperature accurately. Keywords: prediction model, end-point control, mass transfer theory, expert rules.

Spillage Control Method in the Production Process of Argon Oxygen Smelting Low-Carbon Ferrochrome

2013 ◽  
Vol 842 ◽  
pp. 768-772
Author(s):  
Hai Tao Ma ◽  
Shu Fan Ma ◽  
Huan Huan Yu ◽  
Feng Chen
Keyword(s):  
Flow Rate ◽  
Control Method ◽  
Fuzzy Controller ◽  
Sound Intensity ◽  
Low Carbon ◽  
Normal Range ◽  
Nitrogen Flow Rate ◽  
Adjustment Time ◽  
Carbon Ferrochrome ◽  
Addition Amount

Taking the process of Argon oxygen smelting low-carbon ferrochrome as the research object using the multi-rules fuzzy control, the signal of sound intensity is divided into different segments. According to the different segments,control the oxygen flow rate, nitrogen flow rate, the height of Oxygen lance and the addition amount of foam inhibitor, complete the design of the fuzzy controller, then carries on the simulation under MATLAB.The simulation results show that in different segments, the time of the system achieve stability is different, but when the sound intensity stability in 30-50 normal range and the system adjustment time in 3-5 min is a relatively stable system and able to suppress spillage occurs quickly.

Study on Dephosphorization Technologies in Converter with Semi-Steel

2011 ◽  
Vol 396-398 ◽  
pp. 1119-1125
Author(s):  
Jian Hua Zeng ◽  
Wei He ◽  
Yong Chen ◽  
Hong Pan
Keyword(s):  
Oxygen Supply ◽  
Average Rate ◽  
High Rate ◽  
Converter Steelmaking ◽  
End Point ◽  
Point Control ◽  
Dephosphorization Rate ◽  
Low Rate

Because of disadvantages of converter steelmaking with semi-steel in Panzhihua Steel, such as slow-footed slag forming, low rate of dephosphorization, high rate of rephosphorization after converter smelting, studies on increasing dephosphorization rate have been carried out. These studies comprise the optimization of slagging process, oxygen supply, bottom argon supply, end-point control of converter smelting, and so on. With these countermeasures, the rate of dephosphorization has been increased obviously. The results show that the average rate of dephosphorization is above 90% with single-slag process during converter smelting. Otherwise, content of phosphorus at the end-point of converter smelting can be controlled below 0.007%, and rephosphorization rate after converter smelting can be controlled below 0.003%, which meets the requirement of [P]≤0.010% for steel products.

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