Title

CAMPAIGN LIVE EXTENSION AT ROGESA BLAST FURNACES BY COINJECTION OF PCI AND TITANIUM DIOXIDE

CAMPAIGN LIVE EXTENSION AT ROGESA BLAST FURNACES BY COINJECTION OF PCI AND TITANIUM DIOXIDE

Authorship

Hartig, Walter; Amirzadeh-Asl, Djamschid; Fünders, Dieter

Hartig, Walter

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Amirzadeh-Asl, Djamschid

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Fünders, Dieter

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DOI

10.5151/2594-357X-22178

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Abstract

The blast furnace no. 4 Rogesa Dillinger Hütte, located in Dillingen’s plant, Germany, began its 4th campaign in 2003 and was restarted after enlargement of volume and hearth diameter. Until the end of 2011, the campaign’s cumulative production has reached 17 million tons of hot metal. In order to protect the hearth wear and to prolong the campaign life a mixture of pulverized coal and synthetic titanium dioxide (Rutilit NF) is injected in blast furnace simultaneously. This new technique is applied since May 2008 by using the PCI grinding and injection equipment. The fine particle synthetic source of titanium dioxide is premixed with raw coal up to 0.9 kg TiO2/t HM. The mixture is ground und dried, which can be coinjected together into in the blast furnace via the tuyeres. The coinjection of pulverized Rutilit NF and coal with a flowrate of 190 kg/t HM does not show any negative influence onto the reductants consumption of the hot metal production. The wear of the hearth is controlled by this technique. This paper is a common report from AG der Dillinger Hüttenwerke (Rogesa) and Sachtleben Chemie GmbH, Duisburg and will show the long term evaluation of blast furnace hearth temperature in order to protect the hearth from premature erosion.

The blast furnace no. 4 Rogesa Dillinger Hütte, located in Dillingen’s plant, Germany, began its 4th campaign in 2003 and was restarted after enlargement of volume and hearth diameter. Until the end of 2011, the campaign’s cumulative production has reached 17 million tons of hot metal. In order to protect the hearth wear and to prolong the campaign life a mixture of pulverized coal and synthetic titanium dioxide (Rutilit NF) is injected in blast furnace simultaneously. This new technique is applied since May 2008 by using the PCI grinding and injection equipment. The fine particle synthetic source of titanium dioxide is premixed with raw coal up to 0.9 kg TiO2/t HM. The mixture is ground und dried, which can be coinjected together into in the blast furnace via the tuyeres. The coinjection of pulverized Rutilit NF and coal with a flowrate of 190 kg/t HM does not show any negative influence onto the reductants consumption of the hot metal production. The wear of the hearth is controlled by this technique. This paper is a common report from AG der Dillinger Hüttenwerke (Rogesa) and Sachtleben Chemie GmbH, Duisburg and will show the long term evaluation of blast furnace hearth temperature in order to protect the hearth from premature erosion.

Keywords

Blast furnace; Titanium dioxide; Hearth protection; Repair; Rutilit.

Blast furnace; Titanium dioxide; Hearth protection; Repair; Rutilit.