Novokhatskiy A. Theoretical bases of movement of melted products and control for processes in the hearth of blast-furnace

Research object: processes of conduct of liquid products of melting in the period of filling and emptying of furnace of high furnace. The article of research: influence of methods of perfection of work of furnace on the rise of efficiency of smelting of cast-iron. Research methods: at implementation of work on the high furnaces of OAO "Alchevskiy metallurgical combine", OAO "Enakievskiy metallurgical factory", OAO "Dne-propetrovsk metallurgical factory the name of Pet-rovskogo", OAO "Dnepr metallurgical combine" were used laboratory researches, methods of mathematical and physi-cal design, mathematical statistics, comparative analysis of conformity to the law blast-furnace process, passive, active experiments on a metallurgical aggregate. For researches the options on the control of the state of furnace of high fur-nace and slipping of garnisaga were used. In the dissertation on the basis of scientific, theoretical investigations and industrial researches it was solved an important scientific-technical problem of controlling the blast-furnace melting on the basis of analyzing the mechanism of variations in the parameters of processes in the hearth. There were developed theoretical principles and mathematical model of regularities for emptying and charging the hearth with liquid melting products. Applying hydrodynamic current-line and equal-speed-line net of liquid products in the hearth during their output, the analytical method for determination the geometrical parameters of slag depression funnel in the period of input and charging of the hearth is developed. It was made the analysis of mass-changing processes in the blast-furnace hearth and the comparative analysis on comparability with the calculations for determining the volume of the hearth occupied with remaining slag in the end of output. System for controlling the condition of blast-furnace hearth was developed. Blast-furnace malting technology was improved on the basis of analyzing the mechanism of variations in the parameters of processes in the hearth. It was developed the control system for heat loses in the bottom of furnace stack, belly and bosh as well as the method for process control of blast furnace at wall accretion slip. The conditions of round irregularity of operation of blast furnace were determined and the ways on their elimination were developed. A tuyere for joint input of hydrocarbon mixtures and oxygen was designed and tested aiming the prevention of ecumbering the hearth with graphite foam.