GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
Subject Name: Steel Making
Time: 10:30 AM TO 01:00 PM Total Marks: 70
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- V (New) EXAMINATION - WINTER 2019
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Subject Code: 2152108 Date: 06/12/2019Subject Name: Steel Making
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| MARKS | |
| Q.1 (a) List the integrated and mini steel plants in India. | 03 |
| (b) Illustrate with circuit diagram different routes of steel making. | 04 |
| (c) Give the practice outline from Bessemer Steel Making to present day. | 07 |
| Q.2 (a) What is the importance of decarburization in Steel Making? | 03 |
| (b) Explain the Reaction equilibria for Reaction of carbon. | 04 |
| (c) With diagram explain the reaction at slag-metal interface. | 07 |
| OR | |
| (c) Briefly explain pretreatment of hot metal. | 07 |
| Q.3 (a) What are the types of slag? For each slag write suitable refractory lining in converter. | 03 |
| (b) Draw neatly; the converter/furnace is used for any one Oxygen steel making process other than the LD converter. | 04 |
| (c) Explain the influence of lance height and the number of nozzles in the lance on the decarburization and dephosphorization reactions in the LD Converter. | 07 |
| OR | |
| Q.3 (a) What is JFN? Give the equation for it. | 03 |
| (b) With figure explain design of oxygen lance. | 04 |
| (c) Discuss modification and further developments in conventional BOF. | 07 |
| Q.4 (a) Draw the figure of Electric arc furnace and labeled it. | 03 |
| (b) Enlist the sequential operation of Electric arc furnace. | 04 |
| (c) Illustrate with diagram what are the differences between AC-EAF and DC-EAF. | 07 |
| OR | |
| Q.4 (a) What is ASEA — SKF process? Explain. | 03 |
| (b) Briefly explain double slag practice in steel making. | 04 |
| (c) Compare and contrast AOD and VOD processes. | 07 |
| Q.5 (a) What is tundish metallurgy? Briefly explain. | 03 |
| (b) List the ingot defects and give their remedies. | 04 |
| (c) Write a short note on continuous casting. | 07 |
| OR | |
| Q.5 (a) Explain with example, types of Inclusion. How it affects the mechanical properties of steel. | 03 |
| (b) With figure briefly explain R-H degasser. | 04 |
| (c) Explain with neat schematic diagram Ladle Injection Metallurgy | 07 |
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