Use of Low Carbon Content Nano-Carbon Added Magnesia-Carbon Brick in Steel Ladle Metal Zone at Tata Steel, Jamshedpur

摘要

Mag-Carbon bricks, used in steel ladle metal zone, has the main problems of carbon pick-up by ultra-low carbon steel and oxidation which results in lowering ladle campaign life. The present study deals with this major concern by studying the possibility of overall carbon reduction in the brick by using nano carbon addition. It also aims to reduce the heat loss from the bricks and improve the thermal efficiency of steelmaking process. The addition of nano carbon plays a vital role on change of physio-chemical properties of nano carbon added Mag-Carbon bricks, hence it was mandatory to optimise the quantity of nano carbon addition. Comparative study of the bricks has been done to conclude the most suitable one for steel ladle metal zone application. The major tests carried out are HMOR, oxidation resistance, slag corrosion and gas permeability. Nano carbon added bricks show an increased resistance to oxidation and lower permeability. This paper explains the selection of different formulations and testing of all critical properties. The bulk manufacturing had been carried out with the best composition and detail of plant trial conducted.