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The aim of this research project is to study the blast furnace permeability factors namely the downward movement of the burden and the pressure drop of the gases, which are critical when decreasing the coke rate to the minimum possible level in commercial operation. The experimental work has been carried out on a 1:10 scale physical model of the ILVA No. 5 BF of TARANTO Works (10.6 m hearth diameter). For the present research project it has been equipped with systems for blowing air from the tuyeres and measuring the air pressure at several points across the charge. The materials used were coke (5-10 mm size), and calcium nitrate Ca(NO3)(2).4H(2)O (2-8 mm) simulating the ferrous materials. The calcium nitrate is dissolved along the ore melting line, previously defined, by water vapour injected through a series of nozzles. The experimental procedure involves the model being operated first with coke only for a relatively long period in order to stabilize the dead-man; then the ore is charged and vapour is injected along the melting line until stable conditions are again attained. At that moment the complex structure of the charge, which simulates the blast furnace situation, is aerodynamically characterized by measuring the air pressure at different points along the radius on different levels of the model.

Additional information

Authors: GIULI M, Centro sviluppo materiali SpA, Roma (IT);FALZETTI M, Centro sviluppo materiali SpA, Roma (IT);PINTI M, Centro sviluppo materiali SpA, Roma (IT)
Bibliographic Reference: EUR 16653 IT (1997) 81pp., FS, ECU 15.00
Availability: Available from the (2)
ISBN: ISBN 92-828-0825-4
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