System and method for forecasting molten steel components in RH refining process in online manner

Abstract

The invention discloses a system and a method for forecasting molten steel components in the RH refining process in an online manner, and belongs to the technical field of production and control of metallurgical refining. The system comprises an information acquisition module, a degasification judgment module, a gas content comparison module, a gas content display module, a decarburization judgment module, a decarburization module, a temperature real-time acquisition module, a carbon content comparison module, a carbon content display module, an alloying judgment module, an alloying module, a silicon and manganese content correction module, an alloy component content comparison module, an alloy content display module and a molten steel component display module. According to the method, degasification treatment includes removal of hydrogen, nitrogen and oxygen in molten steel, the requirement of corresponding steel types for target component contents is met, decarburization treatment is performed until the requirement of the corresponding steel types for the carbon content is met, alloying treatment is performed until alloy components needing fine adjustment meet the range required by target components, and the contents of gas, carbon, silicon, manganese, chromium and titanium in the molten steel can be accurately forecasted.

Description

technical field [0001] The invention belongs to the production control field of metallurgical refining, and more specifically relates to a system and method for online prediction of molten steel composition in the RH refining process. Background technique [0002] The RH vacuum treatment process has been continuously developed due to its characteristics of easy operation, large processing capacity and high production efficiency. On the basis of the original dehydrogenation, functions such as decarburization, deoxidation, oxygen blowing temperature rise, powder spraying desulfurization and composition control have been developed. It developed into a versatile vacuum refining method. The development of RH vacuum refining better meets the steel quality requirements of the modern steel production and steel industry. It is an important means to improve product quality, reduce production costs, increase steelmaking production capacity, ensure smooth continuous casting, and optimiz...

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Problems solved by technology

The document "RH-MFB Decarburization Process Model and Process Optimization" (Tangshan: Master Thesis of Hebei University of Technology, Liu Posson, 2005) only describes the prediction of decarburization in the RH refining process, and the description of the decarburization mechanism is not detailed enough

However, the document "Design and Realization of RH Refining Control Model System" (Metallurgical Automation, 2008, 32(1):12-16, Lin Yun, etc.) did not consider vacuum degassing, did not accurately analyze the position of vacuum decarburization, and the steel The change of silicon and manganese in the liquid does not consider the change of temperature during refining, which cannot guarantee the accuracy of the prediction of molten steel composition, and the system needs to be equipped with a mass spectrometer and an infrared analyzer to detect CO and CO on-line. 2 changes, the cost is high, and many domestic steel mills cannot meet such conditions

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