Title

QUICK RECOVERY FROM A CHILLY HEARTH OF COSIPA #1 BLAST FURNCE

QUICK RECOVERY FROM A CHILLY HEARTH OF COSIPA #1 BLAST FURNCE

Authorship

Pereira, Eduardo Maurell Lobo; Lima, Ivanir Torres de; Vilela, Vinícius Martins; Paschoalini, Filipe Varvela; Pedro, Josemar Veiga; Spiering, Ton; Geert, Geert; Gravemaker, Jan

Pereira, Eduardo Maurell Lobo

I am this author

Lima, Ivanir Torres de

I am this author

Vilela, Vinícius Martins

I am this author

Paschoalini, Filipe Varvela

I am this author

Pedro, Josemar Veiga

I am this author

Spiering, Ton

I am this author

Geert, Geert

I am this author

Gravemaker, Jan

I am this author

DOI

10.5151/2594-357x-0063

Downloads

Abstract

This paper describes all the operations carried out and the lessons learned in the recovery of Cosipa # 1 blast furnace from a hearth chilling occurred in October 2007 after a 52,8 hours stop. The furnace recovery strategy involved the coke rate changing at the burden column, the accomplishment of the connection between tuyeres and tapholes by lancing and the sequential tuyeres preparation and opening after programmed stops. The slag – iron separation and the two tap holes operation succeeded 4 and 6 days after the blow in respectively which helped the recovery to be controlled, safe and very fast and also allowed the furnace to going back to normal operation in 10 days only. The operation and maintenance crews did excellent jobs and Cosipa and Danieli Corus teams worked in a constructive atmosphere sharing all the information, decisions and actions in one of the quickest recoveries worldwide.

This paper describes all the operations carried out and the lessons learned in the recovery of Cosipa # 1 blast furnace from a hearth chilling occurred in October 2007 after a 52,8 hours stop. The furnace recovery strategy involved the coke rate changing at the burden column, the accomplishment of the connection between tuyeres and tapholes by lancing and the sequential tuyeres preparation and opening after programmed stops. The slag – iron separation and the two tap holes operation succeeded 4 and 6 days after the blow in respectively which helped the recovery to be controlled, safe and very fast and also allowed the furnace to going back to normal operation in 10 days only. The operation and maintenance crews did excellent jobs and Cosipa and Danieli Corus teams worked in a constructive atmosphere sharing all the information, decisions and actions in one of the quickest recoveries worldwide.

Keywords

Blast furnace; Recovery; Hearth; Chilly

Blast furnace; Recovery; Hearth; Chilly