STATIONARY HEAT EXCHANGE IN THE BLAST FURNACE SMELTING ZONE IRRIGATED WITH MELT

Abstract

The problem of stationary heat exchange in the blast furnace smelting zone irrigated with melt, considering features of process of a fi ltration of pig-iron and slag through coke nozzle is formulated. It is shown, that in this zone there is a simultaneous heating by gas of streams of coke, pig-iron and slag, each of which is in a heat exchange condition among themselves. The processes of mutual heat exchange are carried out as convection and radiation. Convection provides heat interchange among gas and all the heated up materials, and also between slag and coke as slag fl owing down on coke partially coats its surface. Radiant heat exchange develops between coke, pig-iron and slag. Its intensity increases with the growth of temperature of heated up materials. It is fi xed, that mutual heat exchange among streams of coke, pig-iron and slag in an irrigated zone of a blast furnace makes considerable impact on formation of a temperature fi eld in this zone. The knowledge of thermal eff ects distribution of chemical reactions of direct restoration of iron, silicium and manganese are necessary for calculation of heat interchange in the fi eld of bosh and a blast-furnace well on height of an irrigated zone and a fraction of a surface of the coke, coated with slag.