Technical: 1.What did you do as an intern at Vizag Steel Plant? 2.What factors should we consider when designing a mill for cold rolling? 3.Name some ores from which copper can be extracted? 4.Write down the reactions for extraction of Copper from Copper pyrites? 5.What is the process difference between extraction of Cu and Fe from its ores? 6.Are there any emulsions used during hot rolling? If so,why? 7.How is the air:oxygen ratio used for heating in the reheating furnace decided?What are the factors considered? 8.What are the different fuel burners used in the reheating furnace? 9.How do we control the purity level of the final product obtained after rolling?

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Technical questions related to metallurgy and engineering.

As an intern at Vizag Steel Plant, I worked on the production line and assisted in quality control.
Factors to consider when designing a mill for cold rolling include material type, thickness, and desired finish.
Copper can be extracted from ores such as chalcopyrite, bornite, and malachite.
The reaction for extraction of Copper from Copper pyrites is 2CuFeS2 + 4O2 → Cu2S + 2FeO + 4SO2.
The process difference between extraction of Cu and Fe from its ores is that Cu is extracted using hydrometallurgical methods while Fe is extracted using pyrometallurgical methods.
Emulsions are used during hot rolling to lubricate the metal and reduce friction.
The air:oxygen ratio used for heating in the reheating furnace is decided based on factors such as the desired temperature and the type of fuel being used.
Different fuel burners used in the reheating furnace include natural gas burners, oil burners, and coal burners.
Purity level of the final product obtained after rolling is controlled through various methods such as chemical analysis and quality control checks.

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