Metallurgical Engineering
GATE MT Primary steel making PYQs
Build your understanding with focused practice from past exam papers.
How to practice Primary steel making
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–10 of 13. Imported answers require independent review unless marked reviewed.
Question 16
Open questionMTMCQ1 markNeeds review
Hot metal from a blast furnace is treated with mill scale prior to oxygen steelmaking for _____ .
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Match the steel plant related processes in Column I with the associated information in Column II.
Column I | Column II |
|---|---|
P. Corex | 1. Melter-gasifier |
Q. Electric Arc Furnace | 2. Natural gas reformer |
R. Midrex | 3. Electromagnetic stirrer |
S. Continuous Casting | 4. Hot heel |
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For supersonic O
jet in basic oxygen furnace steelmaking, choose the correct combination from the following:(1) Converging-diverging nozzle
(2) Diverging-converging nozzle
(3) O
velocity greater than sound velocity at nozzle throat (Mach number > 1)
(4) O
velocity equal to sound velocity at nozzle throat (Mach number = 1)
(5) Exit O
jet pressure ≥ atmospheric pressure
(6) Exit O
jet pressure < atmospheric pressureYour answerChoose one option.
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Match the processes in Column I with the corresponding applications in Column II.
Column I
(P) Fused salt electrolysis
(Q) Carbothermal reduction
(R) Oxidation-refining
(S) Matte converting
Column II
(1) Ironmaking
(2) Aluminium extraction
(3) Copper extraction
(4) Steelmaking
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Which one of the following elements has the slowest removal rate from hot metal in basic oxygen furnace (BOF) steelmaking?
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Which one of the following elements oxidizes first in basic oxygen steel making process?
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Match the terms (in Column I) with the unit process (in Column II)
Column I Column II
(P) Submerged Entry Nozzle 1. Ladle Furnace
(Q) Electric Heating 2. Continuous Casting
(R) Raceway Zone 3. LD Converter
(S) Oxygen Lancing 4. Blast Furnace
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Match the processes in Column I with the most appropriate mechanisms in Column II.
Column I
(P) Blast furnace iron making process
(Q) Hall-Heroult's process
(R) Basic oxygen furnace steel making process
(S) Kroll's process
Column II
Metallothermic reduction
Oxidation
Carbothermic reduction
Fused salt electrolysis
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A Basic Oxygen Furnace operator, at the end of oxygen blow, measures the dissolved oxygen content in the steel as 0.03 wt.% and the steel temperature as 1800 K. The carbon content [C] in the steel is ______ wt.% (round off to two decimal places).
Assume:
Equilibrium between dissolved carbon [C], dissolved oxygen [O], and CO (gas) at 1 atmosphere.
Henry’s law is valid for both [C] and [O]
Given:
[ C ]
+ [ O ]
→ (CO)
R = 8.314 J·mol
·K
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Arrange the following in the correct sequence of operations in an integrated steel plant:
i. Basic Oxygen Furnace (BOF)
ii. Blast Furnace (BF)
iii. Ruhrstahl Heraeus Degasing Process (RH)
iv. Ladle Furnace Process (LF)
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