Reclamation of Main Drive Spindle of Blooming & Billet Mill of Bhilai Steel Plant
Authors
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Reclamation Shop, Bhilai Steel Plant, Pin- 490001, Chhattisgarh ,IN
Rajesh Sood -
AGM, Blooming & Billet Mill, Bhilai Steel Plant, Pin- 490001, Chhattisgarh ,INAjay Bedi
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DGM, Reclamation Shop, Bhilai Steel Plant, Pin- 490001, Chhattisgarh ,INAlok Jha
Abstract
Blooming and Billet Mill is the mother mill of Bhilai Steel Plant. Yearly about 2.5 MT ingots are rolled in to blooms in the Blooming Mill & these blooms are further rolled in to billets in continuous Billet Mill. Billets are fed to Wire Rod Mill & Merchant Mill as raw material
The main drive spindle gives drive to main stand roll. Due to continuous working, the slide block seating and the bearing seating on the journal portion of spindle gets worn out. The average working life of spindle is around 6 months.
The estimated cost of a new spindle assembly is approx. Rs. 5 Crores. Weight of spindle is 32.63 T. The present Russian units & also other units around the world are reluctant to supply such massive spare. Hence it was decided to reclaim slide blocks seating & as well as bearing seating of main drive spindle.
This paper deals with the reclamation technology adopted to revive this vital spare. This paper includes selection of welding consumables, preheat & post heat treatment, welding parameters, preparation & precautions for reclamation procedure.
Blooming and Billet Mill is the mother mill of Bhilai Steel Plant. Yearly about 2.5 MT ingots are rolled in to blooms in the Blooming Mill & these blooms are further rolled in to billets in continuous Billet Mill. Billets are fed to Wire Rod Mill & Merchant Mill as raw material
The main drive spindle gives drive to main stand roll. Due to continuous working, the slide block seating and the bearing seating on the journal portion of spindle gets worn out. The average working life of spindle is around 6 months.
The estimated cost of a new spindle assembly is approx. Rs. 5 Crores. Weight of spindle is 32.63 T. The present Russian units & also other units around the world are reluctant to supply such massive spare. Hence it was decided to reclaim slide blocks seating & as well as bearing seating of main drive spindle.
This paper deals with the reclamation technology adopted to revive this vital spare. This paper includes selection of •welding consumables, preheat & post heat treatment, welding parameters, preparation & precautions for reclamation procedure.
