The correct answer is D. All the above.
Open hearth steel is milder than that obtained by the Bessemer process because it is produced in a furnace with a reducing atmosphere, which removes oxygen from the molten iron. This results in a steel that is less brittle and more ductile.
Engineers prefer open hearth steel for structural purposes because it is more homogenous. This means that the properties of the steel are consistent throughout the material, which is important for structural applications where the steel must be able to withstand high loads.
The basic Bessemer process is suitable for converting poor ore containing a large proportion of sulphur and phosphorus into steel because it uses a basic slag to remove these impurities from the molten iron. This results in a steel that is of higher quality than that produced by the Bessemer process.
Here is a more detailed explanation of each option:
- Option A: Steel produced by open hearth process is milder than that obtained by the Bessemer process.
This is because open hearth steel is produced in a furnace with a reducing atmosphere, which removes oxygen from the molten iron. This results in a steel that is less brittle and more ductile.
- Option B: Engineers prefer open hearth steel for structural purpose as it is more homogenous.
This is because open hearth steel is produced in a furnace with a reducing atmosphere, which removes oxygen from the molten iron. This results in a steel that is more homogenous. This means that the properties of the steel are consistent throughout the material, which is important for structural applications where the steel must be able to withstand high loads.
- Option C: Basic Bessemer process is suitable for converting poor ore containing a large proportion of sulphur and phosphorus into steel.
This is because the basic Bessemer process uses a basic slag to remove these impurities from the molten iron. This results in a steel that is of higher quality than that produced by the Bessemer process.
I hope this explanation is helpful. Please let me know if you have any other questions.