Increasing the Energy Efficiency of Blast-Furnace Smelting by Choosing Rational Parameters for Loading a Multicomponent Charge

Abstract

The purpose of this study was to develop a calculation tool for researchers and technologists - metallurgists, providing the ability to quickly assess the distribution of charge materials in a blast furnace when it is loaded with a multicomponent charge. The goal is achieved by analyzing and summarizing the multidimensional matrix of values for the content of the charge components in the annular zones of the blast furnace, obtained using a mathematical model of its loading under various modes, changing the content of pellets in the charge and the moment the pellets are unloaded onto the main conveyor. The most important results of the studies carried out are the substantiation of the possibility of obtaining and applying calculated dependencies to determine the characteristics of the distribution of charge components with an accuracy acceptable for technological practice, as well as the established relationship between the content of the component in the charge and the value of the set point for the start of unloading it onto the conveyor with the content of this component in the annular zones of the top. Estimated composition of mixtures of charge materials formed in different zones of a blast furnace makes it possible to predict the properties of melts formed from them and to correct them in order to achieve the required level of energy efficiency in melting a multicomponent charge by promptly choosing rational parameters of the loading mode.

Model Decision-Making System in the Task of Choosing the Optimal Composition of the Blast Furnace Burden Under Specific Operating Conditions of Bf

“…These values allow determining the location and length of the melting zone of the burden in the blast furnace, taking into account alkaline compounds. The method of evaluating aggregate transformations of iron ore materials can be used to determine their properties, taking into account the distribution of burden components along the cross-section of the top part of the blast furnace using the burden distribution model presented in [16]. The calculation of the chemical composition of pig iron and smelting slag is carried out by the method of forecasting the distribution coefficients of the burden elements according to the scheme "Burden" + "Technology" = "Smelting products" [14,17].…”