Abstract
The paper presents an experimental study on the formation process of burden surface texture on the blast furnace throat and its influence on the radial distribution of gas flow. The study was performed with the application of blast furnaces equipped with a bell-type charging device using radio-isotope means for the control of burden surface texture (profile) and burden surface level, i.e., gamma locators for burden surface texture. The study was carried out under the conditions of an operating blast furnace in an iron and steel plant using a unique GEOTAPS system for automated control of geometric and temperature parameters of burden material surface on the blast furnace throat. The influence of the surface texture on the gas flow distribution was also investigated. The possibility of a self-stabilization effect for burden surface texture and gas flow in an operating blast furnace under suitable conditions was experimentally proven. As a result of the experimental study performed, four ways of energy-saving technology implementation were determined for the control of blast furnace melting based on the data on the burden surface texture and previously unknown regularities of surface layer formation of burden material on the throat of an operating blast furnace with a bell-type charging device. The main idea of the paper is the development of automated control for the radial distribution of burden material and gas flow using actual or predicted surface texture parameters as important intermediate factors that both describe the process and have a significant simultaneous influence on it.
Highlights
Nowadays, clear trends of a significant increase in energy consumption are observed [1,2,3,4]
For the purposes of control automatization of the radial distribution of burden using the parameters of burden surface texture, it is essential that the texture is described by a minimum of generalized indicators
It took into peculiarities account the commonly known influence ofofthe gas flow.ofIt the alsocentral took into account the the commonly known extreme influenceindicators of the development degree degree gas flow on main technical and economic of blast furnace of the central While gas flow on the main technical andhopper economic indicatorsthe of blast furnaceofironmaking
Summary
Clear trends of a significant increase in energy consumption are observed [1,2,3,4]. This is the reason why the issue of energy saving is of the highest priority in the energy policies of developed countries [5,6,7,8]. The complex thermal processes resulting from blast furnace melting were described by the Neumann principle. This principle was used for the magnitude determination of the maximum stress vector (the polar tensor of the second rank) for the definition of the axial tensor of anisotropic mechanical deformations, which appeared under the high-temperature expansion
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