Sinyakov R. Development of elements of system of auto-mated design of steelmaking processing in a high-power EAF

Research subject - technological process of steel smelting in a high-power EAF. Research objective - development of system of automated design of steelmaking processing in electric arc furnace. Research methods - theoretical, experimental, and methods of mathematical statistics. Practical significance - for the first time the technique of automated design of steelmaking processing in EAF has developed. It enables to evaluate the technological process prior to the beginning of heat, and provides on-line adjustment of the technological project, which allows to realize a principle of situational heat control in an automatic mode. On the basis of developed methods, SAD TP of steelmaking in EAF has been created. The technological receptions, allowing to reduce and stabilize the content of nitrogen in a metal of EAF has been worked out. Scientific novelty - a model of carbon oxidation has been obtained, which enables to describe available experimental and plant data on the kinetics of carbon oxidation without assumption of changing limiting links in the area of "critical concentrations". For the first time it has been shown, that similar features of silicon and manganese oxidation can be also described purely on the thermodynamic basis. The new method of the account of kinetic displacements of oxidizing processes for the conditions of steel smelting in EAF has been suggested, where portions of metal and slag coming to the equilibrium in a unit time were identified as an empirical criterion of kinetic delay. For the first time the quantitative description of "pumping effect" on the basis of the joint solving of Gibbs-Duhem equation, and the law of simple multiple ratios has been obtained. It enabled to evolve concepts of a denitrization mechanism as applied to the working conditions of EAF. Results have been introduced on EAF-1 and EAF-2 of Belarusian metal works, and on EAF-2 of Moldavian metal works. Area of deployment - development, research, and educational institutions; metallurgical plants.