Community Research and Development Information Service - CORDIS

Abstract

Final report on Contract No 7210-PR/004; 1 July 1997 to 31 December 2000.

The research aimed to characterise the permeability to gas of the blast furnace burden during softening and melting, to develop an improved model of the blast furnace cohesive zone, and to introduce this model into a general model of the blast furnace in order to assess ways to increase PCI rates. Softening and melting experimental tests were carried out on five types of materials: olivine pellets, acid pellets, and sinters of three different basicities. The conclusion of the tests is that the two main factors controlling the reduction of the burden material, and with that the meltdown properties, are the hydrogen content, resulting from the PCI rate, and the temperature increase rate, resulting from the rate of descent in the blast furnace. Based on these experimental results, a model of the cohesive zone was developed, which compares very well with the observations made on dissected blast furnaces. Finally, the blast furnace model has been used to study the influence on the cohesive zone and on some blast furnace performances of the variables affecting the cohesive zone permeability, essentially burden composition and chemistry. The influence of the layers thickness has also been assessed. .

Additional information

Authors: DANLOY G, CRM, Liège (BE);MIGNON J, CRM, Liège (BE);OURY L, CRM, Liège (BE);BOLIGNANO G, CSM, Rome (IT);PISTELLI M I, CSM, Rome (IT);GELLI I, CSM, Rome (IT);HAHLIN P, MEFOS, Luleå (SE)
Bibliographic Reference: EUR 20197 EN (2002), pp.102. Euro: 16.00
Availability: EUR-OP reference: KI-NA-20197-EN-S Available from EUR-OP sales agents. URL: http://eur-op.eu
ISBN: ISBN: 92-894-3206-3
Record Number: 200214582 / Last updated on: 2002-04-08
Category: PUBLICATION
Original language: en
Available languages: en