Tischenko O. Perfection of technology of the blast-furnace melting on the basis of the control of gasdynamic properties of charge materials.

Object of research – the processes of regulation of a gas stream of a blast-furnace melting by changes of modes of loading of materials on a blast-furnace throat of a blast-furnace, in conditions of high vibration of a granulated structure of the iron-ore materials. Subject of research – the laws of changes of acoustic characteristics of the sound fluctuations which are taking place through a layer of charge materials of the agglomerated and the blast-furnace manufactures with various gas dynamic characteristics. Methods of research. To achieve the aim and obtain general results of thesis there were used analytical, numeral and up-to-date methods of experimental research. One of ways of increase of technical and economic parameters of blast-furnace melting is rational distribution of loaded materials on a furnace throat of a blast furnace, providing a steady gas stream and more full use of its thermal and chemical energies in conditions of fluctuation of gasdynamic properties of the blast charge. Thedeveloped way and the device of the control of gasdynamic characteristics of the charge materials, based on passing of sound fluctuations through a layer of an analyzed material and definition of factor of sound transmission of a charge. The experimental plant for definition of factor of sound transmission of charge materials of blast-furnace melting is developed and introduced into manufacture. The analytical method of definition of losses of a pressure of gas in the top horizons of a blast furnace is offered on the basis of positions of the theory of similarity, in view of criterion of hydrodynamic similarity of Euler and dimensionless factor of sound transmission. The comparative analysis of factors of sound transmission of various charge materials used in a blast-furnace melting is made. The way of regulation of distribution of a charge on a furnace throat of a blast-furnace is developed and introduced into manufacture depending on its factor of sound transmission which consists in change of modes of loading of materials in a furnace, change of a level of filling up and volume of submission.