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The argon oxygen refining ferroalloys splash forecasting system

Author: LvZuoDong
Tutor: LinXiaoMei
School: Changchun University of
Course: Measuring Technology and Instruments
Keywords: Slopping prediction Road gas analysis FeO content Online testing
CLC: TF33
Type: Master's thesis
Year: 2010
Downloads: 42
Quote: 0
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Abstract


With the expansion of the scale of ferroalloy production and refining technology in ferroalloy production in order to meet the requirements of energy saving kind of future development direction. The AOD furnace as a method for stainless steel production technology has been very mature, but for ferroalloy production research work is still in its infancy. AOD furnace the ferroalloy smelting process, often splashing. , AOD furnace ferroalloy smelting basically empirical model to predict the splash, this article seeks an online and accurate method to reduce AOD furnace refining splash of ferroalloy production process. This article first clarify the meaning of argon-oxygen refining ferroalloy production process to prevent splashing, analyzes the development status of the prevention splash at home and abroad, introduction of key comparison for metal smelting process various preventive splash draw traditional preventive spray The splashed method bad real-time, complex operation, a higher rate of false positives splash defects, therefore, it is necessary to propose a new method to prevent splashing. It is in this context, the proposed method based the AOD furnace prevention splash design and implementation of online detection system based on exhaust gas analysis, parameter detection system by the furnace gas, AOD parameters, process parameter detection system and the main control system structure. 50 Furnace data collected by the line detector preliminary analysis of the conclusions of the analysis derived AOD furnace furnace gas emissions law, thus confirming the feasibility of this line detector in the AOD furnace smelting process. Then see a large number of domestic and foreign-related information based on the analysis of splashing, to draw the AOD furnace splash fundamental reason is the accumulation of a large number of FeO in the process of smelting furnace and hot metal C react violently, an enormous the work of expansion, so that the molten iron overflow. In this paper, design, research and analysis of the information collected and the gas content of the flue gas composition, flow line detector, use of oxygen accumulation integral model and curve fitting slopping prediction model, online testing molten iron FeO content. Operator according to the situation of the change in the FeO content, using the method to change the oxygen lance position to control the FeO content in the molten iron to prevent its large accumulation. Analysis and comparison of experimental data demonstrated the validity of the model. Finally, VB programming language, research and design of the PC interface based the AOD furnace prevention splash system, the system has a simple, intuitive and friendly interface. Operator as long as the main interface input the static parameters required by the slopping prediction model, the system will be able to correct, online detection molten iron in FeO and automatic control based on the condition of the furnace, oxygen lance position to achieve the purpose of prevention of splashing. AOD furnace smelting process through the development and application of the analyzer of the AOD furnace, not only to prevent splashing, but also to achieve the AOD furnace smelting fully automated, reducing the AOD furnace smelting cycle, improve the AOD furnace production capacity, improve the quality of the molten iron to reduce upper and lower heats hot metal composition, temperature fluctuations, greatly improving the quality of ferroalloy products, energy saving, to guarantee conditions precedent for the iron and steel enterprises to enhance the market competitiveness, and enhance new product development efforts.

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CLC: > Industrial Technology > Metallurgical Industry > Metallurgical machinery,metallurgical production automation > Ferroalloy smelting machinery and production automation
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