Question

In L-D converters pure oxygen is used for oxidation while in Bessemer process air is used for the same purpose. Which of these is better and why?
A.Nitrogen in air makes the steel brittle
B.Nitrogen away from lot of heat
C.Both $1$ and $2$
D.None of these

Answer 1

In the given question firstly we have to define the working of both the conversion process and the ways used in them. We know that oxygen is better for usage of steelmaking because it protects the steel from attack of nitrogen. Hence the steel will not become brittle as well as it will permit the large amount of scrap iron.

Complete step by step answer:
For the given question we need to keep some things in the mind, they are :
-The ongoing process is the oxidation of the compounds.
-The process is given in two ways the L-D coverer and the Bessemer process
Now by the facts we know we can state that the :
-Oxygen can be a better use in the process of making steel as the main advantages through it is that it does not expose the steel to excessive nitrogen.
-This is the thing that can cause the brittle nature of the steel.
-It can also be much easier to control for the case and it would only permit the correct process of melting and refining a huge amount of scrap iron and steel.
-This would be so because of the fact that nitrogen carries away a lot of heat and hence attaining the required temperature would be a hard process.
So by these facts we can say that the correct answer would be option C, both $1$ and $2$ .

Note:
The Bessemer process was the first inexpensive industrial process for the mass production of steel from molten pig iron before the development of the open hearth furnace. The key principle is removal of impurities from the iron by oxidation with air being blown through the molten iron.