Community Research and Development Information Service - CORDIS

Abstract

This project focused mainly on investigations into the injection of titanium-rich materials, in order to assist BF operators optimise their hearth protection measures. Thermochemical calculations were carried out pointing out the most favourable conditions for the formation of protective TiCN layers for hearth protection. Furthermore, a simplified melt flow pattern using a statistical reactor model evaluation method was developed in order to investigate the residence time distribution (RTD) of titanium in the BF and to evaluate different injection regimes. The results of the theoretical investigations built the base for the injection campaigns at the various steelworks. Numerous injection campaigns were carried out at blast furnaces with only one tap hole as well as at blast furnaces with alternating tapping at two or more tap holes. Based on the results of the injection campaigns, practical recommendations are given for BF operators for the efficient injection of TiO2 materials for hearth protection. Favourable conditions for titanium injection are defined, for example by high temperatures of HM and slag. Furthermore, a discontinuous injection with high injection rates during tapping is recommended for efficient hearth protection. Additional injection campaigns with a TiO2-rich waste material and ilmenite sand as well as campaigns with an injection of coal and TiO2 material through one tuyère were also carried out within this RFCS project. Scaffold formations were detected and analysed after injection campaigns at the EBF of MEFOS, as well as after excavation of BF A of voestalpine for relining, and excavation of BF 2 of Ruukki for the mid-campaign repair.

Additional information

Authors: KORTHAS B, ThyssenKrupp Stahl, Duisburg (DE);HUNGER J, EKO Stahl, Eisenhüttenstadt (DE);PSCHEBEZIN V, EKO Stahl, Eisenhüttenstadt (DE);ADAM J, VDEh, Düddeldorf (DE);HARP G, VDEh, Düddeldorf (DE);KALLIO S, Ruukki, Raahe (FI);HURME R, Ruukki, Raahe (FI);WIKSTRÖM J-O, MEFOS, Luleå (SE);HAHLIN P, MEFOS, Luleå (SE);WIEDNER S, Voestalpine Stahl, Linz (AT);DI SANTE L, Centro Sviluppo Materiali (CSM), Roma (IT);GELLI I, Centro Sviluppo Materiali (CSM), Roma (IT)
Bibliographic Reference: EUR 22821 EN (2007), 140 pp. Euro: 25
Availability: http://bookshop.europa.eu/is-bin/INTERSHOP.enfinity/WFS/EU-Bookshop-Site/en_GB/-/EUR/ViewPublication-Start?PublicationKey=KINA22821 (Catalogue Number: KI-NA-22821-EN-S)
ISBN: ISBN: 978-92-79-05368-9
Record Number: 200719488 / Last updated on: 2007-10-19
Category: PUBLICATION
Original language: en
Available languages: en