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Which of the following constituents is present in the blast furnace slag?
- a)50% alumina and 20% calcium oxide
- b)45% calcium oxide and 35% silica
- c)25% calcium oxide and 15% silica
- d)25% magnesia and 15% silica
Correct answer is option 'B'. Can you explain this answer?
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Constituents present in blast furnance slag are:
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Blast Furnace Slag Composition
Blast furnace slag is a byproduct of the iron-making process in a blast furnace. It is formed when the iron ore, coke, and limestone react together, producing molten iron and slag. The slag is then rapidly cooled to form a glassy material. The composition of blast furnace slag can vary depending on the specific operation, but it typically contains a combination of oxides of silicon, calcium, aluminum, and magnesium.
Constituents of Blast Furnace Slag
Among the options given, the correct answer is option B: 45% calcium oxide and 35% silica.
- Calcium Oxide (CaO): Calcium oxide, also known as lime, is one of the primary constituents of blast furnace slag. It is formed from the decomposition of limestone (CaCO3) in the blast furnace. Calcium oxide reacts with other components in the slag to form various compounds, contributing to its overall properties.
- Silica (SiO2): Silica is another major component of blast furnace slag. It is derived from the impurities present in the iron ore and coke used in the blast furnace. Silica plays a crucial role in the formation of the glassy structure of the slag and contributes to its strength and stability.
- Alumina (Al2O3): Alumina is present in smaller quantities in blast furnace slag. It is typically derived from the impurities present in the iron ore. Alumina contributes to the overall chemical and physical properties of the slag.
- Magnesia (MgO): Magnesia is not a major constituent of blast furnace slag. While it can be present in small amounts, it is not as significant as calcium oxide and silica.
Conclusion
In summary, blast furnace slag is primarily composed of calcium oxide (CaO) and silica (SiO2). These two constituents make up a significant portion of the slag's composition and play a crucial role in determining its properties. While alumina and magnesia may be present in smaller quantities, they are not as prominent as calcium oxide and silica. Therefore, option B, which states 45% calcium oxide and 35% silica, is the correct answer.
Blast furnace slag is a byproduct of the iron-making process in a blast furnace. It is formed when the iron ore, coke, and limestone react together, producing molten iron and slag. The slag is then rapidly cooled to form a glassy material. The composition of blast furnace slag can vary depending on the specific operation, but it typically contains a combination of oxides of silicon, calcium, aluminum, and magnesium.
Constituents of Blast Furnace Slag
Among the options given, the correct answer is option B: 45% calcium oxide and 35% silica.
- Calcium Oxide (CaO): Calcium oxide, also known as lime, is one of the primary constituents of blast furnace slag. It is formed from the decomposition of limestone (CaCO3) in the blast furnace. Calcium oxide reacts with other components in the slag to form various compounds, contributing to its overall properties.
- Silica (SiO2): Silica is another major component of blast furnace slag. It is derived from the impurities present in the iron ore and coke used in the blast furnace. Silica plays a crucial role in the formation of the glassy structure of the slag and contributes to its strength and stability.
- Alumina (Al2O3): Alumina is present in smaller quantities in blast furnace slag. It is typically derived from the impurities present in the iron ore. Alumina contributes to the overall chemical and physical properties of the slag.
- Magnesia (MgO): Magnesia is not a major constituent of blast furnace slag. While it can be present in small amounts, it is not as significant as calcium oxide and silica.
Conclusion
In summary, blast furnace slag is primarily composed of calcium oxide (CaO) and silica (SiO2). These two constituents make up a significant portion of the slag's composition and play a crucial role in determining its properties. While alumina and magnesia may be present in smaller quantities, they are not as prominent as calcium oxide and silica. Therefore, option B, which states 45% calcium oxide and 35% silica, is the correct answer.
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Which of the following constituents is present in the blast furnace slag?a)50% alumina and 20% calcium oxideb)45% calcium oxide and 35% silicac)25% calcium oxide and 15% silicad)25% magnesia and 15% silicaCorrect answer is option 'B'. Can you explain this answer?
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