Rogesa Roheisengesellschaft Saar mbH (Dillingen, Germany):

Hartig W., Dr., Director of Blast Furnace Production

vormals Huntsman Pigments and Additives (Duisburg, Germany):
Amirzadeh-Asl D., (at the moment of paper preparation), e-mail: d.amirzad@hotmail.com

GSR Gesellschaft für syntetische Rohstoffe mbH (Moers, Germany):
Fünders D., Dr., CEO

The project “Hearth protection in BF by using of Ticontaining materials” was focused on investigations of charging with the burden (lump ilmenite) and tuyère injection (rutilit) in order to assist the blast furnace operators to optimize the hearth protection, prolongation of campaign and economic effects of different technologies for addition of titaniumcontaining material. The results show that the tuyère injection of synthetic TiO₂ products is much more effective than charging lump ilmenite with the burden. The efficiency of the solution of the TiO₂ in the hot metal by using rutilit is three times higher than with lump ilmenite. Additionally the tuyère injection can be used very effectively as a preventive measure for hearth protection and also as local measure at acute damaged zones (hot spot) in the BF hearth. The use of synthetic titanium products via tuyère injection instead of addition of lumpy ilmenite via burden has significant advantages:
• fewer occurrences of hot spots in the hearth and less danger of hearth breakouts;
• higher availability and productivity of the blast furnace;
• prolongation of the campaign and therefore less capital costs;
• improved selling of the granulated slag to the cement industry.

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16. Hartig, W.; Amirzadeh-Asl, D.; Fünders, D.: Result of co-injection of PCI and synthetic titaniumdioxide products for protection of the hearth at Rogesa BF No 5 after stop for relining, Proc. AISTech 2011, Indianapolis, USA, 2−5 May 2011.
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18. Santos, G. S.; Costa Manso, G. A.; Oliveira, M. A. G.; Fernandes, M. V.; Amirzadeh-Asl, D.; Fuenders, D.: Hearth protection of blast furnace no 3 of Usiminas by injection of titanium dioxide products, 41^st Seminar on Iron Mining Reduction, ABM, Vitória, Brazil, 12−15 Sept 2011.
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