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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 15a
SUMMARY:Extension of D blast furnace campaign life at Tata Steel Limited
DESCRIPTION:‘D’ Blast Furnace installed in 1923, was a 400 tpd furnace. It was upgraded to 800 tpd in 1967. In 1998 up gradation, furnace was the second at Tata Steel and sixteenth in India to have carbon hearth. The furnace has produced 6.96 million tonnes in its current campaign. The furnace has been subjected to frequent on and off mode of Operation, primarily due to fluctuations in the demand since 2008. 
After 15 years of successful operation, the furnace started showing signs of ageing, especially in the lower stack, Bosh/Belly and Tuyere jacket area. The furnace was plague with the problem of hot spots in the above-mentioned area. This led to catastrophic failures of cooling plates, flame shooting around the mantle ring, necessitating frequent blanking of tuyeres, grouting shutdowns and a centrally biased burden distribution. The above problem was taxing both the fuel rate and productivity of the furnace and therefore a repair plan to prolong the campaign life of the furnace was necessary.
The 3rd term repair of 'D' furnace was a unique repair in the history of Tata Steel as it was the second attempt to have a multi campaign on the same hearth. The Blast Furnace team was not having any past experience of blowing down the furnace with its own team till tuyere level and capping the red-hot coke below tuyere level to make the furnace gas free for carrying out the repair jobs inside the furnace. The repair plan consisted of blowing down the furnace to the tuyere level, manual coke raking after nitrogen quenching, removal and leveling of coke, capping of hearth and repairing throat, tuyere jacket, Bosh, belly area without disturbing the bricks in stack area and carbon hearth.
Key Words - Blast Furnace, Blow down, Stack, Burden, and campaign life.

CLASS:PUBLIC
DTSTART:20230615T094000
DTEND:20230615T100000
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