Question:
Which one of the following slag components is responsible for the oxidizing power of steelmaking slags?
Which one of the following slag components is responsible for the oxidizing power of steelmaking slags?
Show Hint
Remember: In steelmaking, CaO controls basicity, SiO\(_2\) adjusts acidity, MgO stabilizes slag, but FeO controls oxidizing power.
Updated On: Aug 23, 2025
- SiO\(_2\)
- CaO
- MgO
- FeO
Hide Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Nature of steelmaking slag.
Slags in steelmaking are typically mixtures of basic oxides (CaO, MgO), acidic oxides (SiO\(_2\)), and iron oxides (FeO, Fe\(_2\)O\(_3\)). Step 2: Which provides oxidizing power?
- FeO is reducible and can supply oxygen to oxidize impurities such as C, Si, Mn, and P in molten steel. - SiO\(_2\), CaO, MgO act as fluxes and basic stabilizers, but do not provide oxygen directly. Step 3: Eliminate options.
- (A) SiO\(_2\): acidic oxide, combines with CaO for slag basicity. Not oxidizing.
- (B) CaO: basic oxide, neutralizes acidic oxides, but not oxidizing.
- (C) MgO: refractory/basic, improves slag stability. Not oxidizing.
- (D) FeO: provides oxygen → oxidizing component. Step 4: Conclude.
The oxidizing power of steelmaking slags arises primarily from FeO. \[ \boxed{\text{FeO}} \]
Slags in steelmaking are typically mixtures of basic oxides (CaO, MgO), acidic oxides (SiO\(_2\)), and iron oxides (FeO, Fe\(_2\)O\(_3\)). Step 2: Which provides oxidizing power?
- FeO is reducible and can supply oxygen to oxidize impurities such as C, Si, Mn, and P in molten steel. - SiO\(_2\), CaO, MgO act as fluxes and basic stabilizers, but do not provide oxygen directly. Step 3: Eliminate options.
- (A) SiO\(_2\): acidic oxide, combines with CaO for slag basicity. Not oxidizing.
- (B) CaO: basic oxide, neutralizes acidic oxides, but not oxidizing.
- (C) MgO: refractory/basic, improves slag stability. Not oxidizing.
- (D) FeO: provides oxygen → oxidizing component. Step 4: Conclude.
The oxidizing power of steelmaking slags arises primarily from FeO. \[ \boxed{\text{FeO}} \]
Was this answer helpful?
0
0
Top Questions on Reaction Mechanisms & Synthesis
- The reaction represented by A → B follows first order kinetics. At a given temperature, 20\% of the reaction is completed in 223 s. The time taken to complete 50\% of the reaction at the same temperature is ............ s (rounded off to the nearest integer).
- GATE MT - 2025
- Mineral Processing and Extractive Metallurgy
- Reaction Mechanisms & Synthesis
- Molten steel at 1900 K having dissolved hydrogen needs to be vacuum degassed. The equilibrium partial pressure of hydrogen to be maintained to achieve 1 ppm of dissolved hydrogen is .............. Torr (rounded off to two decimal places).
- GATE MT - 2025
- Mineral Processing and Extractive Metallurgy
- Reaction Mechanisms & Synthesis
- Match the steel plant related processes in Column I with the associated information in Column II. Column I: P. Corex
Q. Electric Arc Furnace
R. Midrex
S. Continuous Casting
Column II: 1. Melter-gasifier
2. Natural gas reformer
3. Electromagnetic stirrer
4. Hot heel
- GATE MT - 2025
- Mineral Processing and Extractive Metallurgy
- Reaction Mechanisms & Synthesis
- Which of the following conditions is/are favorable for producing low-silicon hot metal in blast furnace ironmaking?
- GATE MT - 2025
- Mineral Processing and Extractive Metallurgy
- Reaction Mechanisms & Synthesis
- Match the following elements in Column I with their respective ores in Column II. \begin{center} \begin{tabular}{|l|l|} \hline Column I & Column II
\hline P. Al & 1. Rutile
\hline Q. Fe & 2. Hematite
\hline R. Ti & 3. Chalcopyrite
\hline S. Cu & 4. Bauxite
\hline \end{tabular} \end{center}- GATE MT - 2025
- Mineral Processing and Extractive Metallurgy
- Reaction Mechanisms & Synthesis
View More Questions
Questions Asked in GATE MT exam
- Two consecutive estimates of the root of a function $f(x)$ obtained using the Newton-Raphson method are $x_i = 8.5$ and $x_{i+1 = 13.5$, and the value of the function at $x_i$ is 15. The numerical value of the first derivative of the function evaluated at $x_i$ is ............ (in integer).}
- GATE MT - 2025
- Calculus
- A cylindrical Al alloy billet of 300 mm diameter is hot extruded to produce a cylindrical rod of 75 mm diameter at a constant true strain rate of 10 s$^{-1$. The flow stress of the alloy at the extrusion temperature is given by $\sigma = 10 \, (\dot{\epsilon})^{0.3}$ MPa. Assume the alloy is perfectly plastic and there is no temperature rise during the extrusion process. The ideal plastic work of deformation per unit volume is ............ × 10$^6$ J m$^{-3}$ (rounded off to one decimal place).}
- GATE MT - 2025
- Metallurgical
- Temperatures at two sides of a 0.4 m thick copper plate are 1000 and 500 °C. Assuming steady state, one-dimensional conductive heat transfer through the wall and ignoring end-effects, the magnitude of the heat flux through the wall is ............... × 10$^5$ W m$^{-2$ (in integer).} Given: Thermal conductivity of copper = 400 W m$^{-1}$ K$^{-1}$
- GATE MT - 2025
- Thermodynamics
- In polycrystalline Ni, Nabarro–Herring diffusion creep was found to be the rate controlling creep mechanism at a certain temperature. At that temperature, if the steady state strain rate is $10^{-8$ s$^{-1}$ at a stress of 10 MPa, the steady state strain rate of $10^{-9}$ s$^{-1}$ will be obtained at a stress value of ............. MPa (in integer). Assume that the same creep mechanism is rate controlling during the creep deformation.}
- GATE MT - 2025
- Material Science
- A cylindrical specimen is subjected to plastic deformation in tension up to a uniform elongation of 10\%. The final cross-sectional area of the gage section is found to be 20 mm$^2$. The initial cross-sectional area of the gage section is ............ mm$^2$ (rounded off to an integer).
- GATE MT - 2025
- Material Science
View More Questions