Title

21ST CENTURY LINING DESIGN FOR BLAST FURNACES

21ST CENTURY LINING DESIGN FOR BLAST FURNACES

Authorship

Kaptein, F.; Ametrano, R.C.; Laar, R.J. van

Kaptein, F.

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Ametrano, R.C.

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Laar, R.J. van

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DOI

10.5151/2594-357X-17543

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Abstract

Blast furnaces are cooled by stave and/or plate coolers to protect the furnace shell. Choices for either system are usually based on objectives related to working volume or durability. In modern blast furnace iron making operations, process stability and hence a plant's performance is greatly influenced by the furnace's internal profile. The purpose of this article is to present a process–based comparison of lining systems. Based on the documented knowledge of the blast furnace iron making process from zone to zone, field observations (i.e. post mortem and interim findings at shut down furnaces) are analyzed to compare successes and failures of lining and cooling systems. Several findings were analyzed, which provided insight into how and why designs have been successful or have failed under various circumstances (i.e. productivity, raw materials, etc.) Critical factors for maximized process stability and campaign length from hearth to throat are presented.

Blast furnaces are cooled by stave and/or plate coolers to protect the furnace shell. Choices for either system are usually based on objectives related to working volume or durability. In modern blast furnace iron making operations, process stability and hence a plant's performance is greatly influenced by the furnace's internal profile. The purpose of this article is to present a process–based comparison of lining systems. Based on the documented knowledge of the blast furnace iron making process from zone to zone, field observations (i.e. post mortem and interim findings at shut down furnaces) are analyzed to compare successes and failures of lining and cooling systems. Several findings were analyzed, which provided insight into how and why designs have been successful or have failed under various circumstances (i.e. productivity, raw materials, etc.) Critical factors for maximized process stability and campaign length from hearth to throat are presented.

Keywords

Blast furnace; Bosh and stack; Refractory; Cooling; Lining; Campaign life.

Blast furnace; Bosh and stack; Refractory; Cooling; Lining; Campaign life.