Abstract
The development of heat-transfer circuits in the blast furnace as the technologies of blast-furnace smelting are improved are considered. It is shown that there are two zones of intense heat-transfer, and in modern conditions, when different kinds of iron ore are smelted, the use of combined blast with high parameters is a prerequisite for the stability of blastfurnace smelting operation and the smelting efficiency.
Highlights
Almost all physical and chemical processes occurring in the blast furnace are pyrometallurgical
Their development depends on the amount of heat, that is removed from the combustion zone, the distribution of temperature height wise and sections of blast furnaces
This relationship is complicated by the fact that the development of thermal processes that determine the level of temperature, in turn, are influenced by chemical processes changing during the smelting the composition and physical state of the charge components, and their weight
Summary
Almost all physical and chemical processes occurring in the blast furnace are pyrometallurgical Their development depends on the amount of heat, that is removed from the combustion zone, the distribution of temperature height wise and sections of blast furnaces. B.I. Kitaev considered the blast furnace as a countercurrent heat exchanger, where heat- and mass-transfer processes occur simultaneously. Kitaev considered the blast furnace as a countercurrent heat exchanger, where heat- and mass-transfer processes occur simultaneously He found that the temperature distribution in the blast furnace is determined by the heat capacities of charge and gas flows, namely, by their ratio.
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