Community Research and Development Information Service - CORDIS


Final report on Contract No 7210-PA/006; 1 July 1997 to 31 December 2000

The knowledge of motion of liquids in the hearth and the position of the furnace 'dead man' are examples of important factors in prolonging the life of hearth refractories. The wear mechanisms of the lining in the hearth and the composition of the salamander were examined. The beginning of the 'brittle layer' has thermomechanical reasons. Zinc and/or alkali compounds are of minor importance. For the areas of intermediate repairs, standard carbon material has to be preferred to small size hot pressed carbon bricks. The ceramic cup can be optimised.

Injecting titanium containing powder through the tuyeres scaffolds were built up in front of the carbon material. A direct measurement technique of the residual refractory thickness, the principle of which is based on refractory acoustic resonance determination, has been developed. The modelling of neutron techniques for measuring the carbon thickness was tested. The measured wear profiles were in good accordance with the ones calculated by a model. Generally the 'brittle layer' formation may cause the biggest insecurities in calculating the actual wear condition.

Investigations of coke movement with traced coke had shown that the coke in the 'dead man' moves downwards by about 1 metre per day. Another result was the high decrease of the coke hot strength in the hearth. Radioactive tracer experiments show the effects of the hearth permeability on the fluid flow in the blast furnace hearth.

Additional information

Authors: MÜLHEIMS K, TKS, Duisburg (DE);FUSENIG R, TKS, Duisburg (DE);PRITCHARD W D N, CORUS UK, Grangetown (GB);DRAKE P, CORUS UK, Grangetown (GB);STEILER J M, IRSID, Maizières-Les-Metz (FR);VENTURINI M J, IRSID, Maizières-Les-Metz (FR);ZAÏMI S A, IRSID, Maizières-Les-Metz (FR);SCHULTE M, BFI, Düsseldorf (DE);VOSS M, BFI, Düsseldorf (DE);ZAIMI S A, IRSID, Maizieres-Les-Metz (FR)
Bibliographic Reference: EUR 20109 EN (2002), pp.272. Euro: 41.00
Availability: EUR-OP reference: KI-NA-20109-EN-S. Available from EUR-OP sales agents. URL:
ISBN: ISBN: 92-894-3157-1
Record Number: 200214593 / Last updated on: 2002-04-19
Original language: en
Available languages: en