Title

PULVERIZED COAL INJECTION OPTIMIZING THE BLAST FURNACE PROCESS

PULVERIZED COAL INJECTION OPTIMIZING THE BLAST FURNACE PROCESS

Authorship

Paramanathan, Bala K.; Engel., Edo

Paramanathan, Bala K.

I am this author

Engel., Edo

I am this author

DOI

10.5151/2594-357X-22562

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Abstract

The injection of reduction agents via the tuyeres is now common practice world–wide in blast furnace operation. The benefits of reduced coke consumption and increased production due to the removal of nitrogen from the blast with increasing oxygen enrichment have been recognized by the industry. In choosing an injection system, the user faces a choice of designs with fundamental differences, the most important of which is the type of flow control. Among the most common systems in the industry, some feature active flow control e.g. through the application of throttling valves, whereas flow control in the Danieli Corus system is based on physical principles such as uniform pressure drop across injection lines. For an optimized blast furnace process, production rates in front of the individual tuyeres should be balanced, and the production in front of a tuyere depends on the local coal to gas ratio. This article discusses how various designs perform in this respect.

The injection of reduction agents via the tuyeres is now common practice world–wide in blast furnace operation. The benefits of reduced coke consumption and increased production due to the removal of nitrogen from the blast with increasing oxygen enrichment have been recognized by the industry. In choosing an injection system, the user faces a choice of designs with fundamental differences, the most important of which is the type of flow control. Among the most common systems in the industry, some feature active flow control e.g. through the application of throttling valves, whereas flow control in the Danieli Corus system is based on physical principles such as uniform pressure drop across injection lines. For an optimized blast furnace process, production rates in front of the individual tuyeres should be balanced, and the production in front of a tuyere depends on the local coal to gas ratio. This article discusses how various designs perform in this respect.

Keywords

Blast furnace; Producitivity; Coal injection.

Blast furnace; Producitivity; Coal injection.