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How does calcium carbonate purify iron?
Calcium carbonate (limestone) is used in blast furnaces to capture impurities and form a slag that floats above the molten iron to keep the impurities from mixing back into the iron.
Explain how limestone purifies the iron?
When limestone reacts with iron, it removes impurities and forms slag, which is less dense than molten iron and therefore floats over it, allowing it to be tapped off seperatly. It (the slag) is rather useless, but can be used in concrete.
Pig iron is produced by heating the coke iron and limestone in a what?
Pig iron is produced when heating * Iron ORE (not iron as the question says!) * Coke * limestone in a Blast Furnace.
What colour can iron rich limestone be?
Iron-rich limestone can range in color from rusty red to brown or yellow, depending on the amount of iron present. The iron minerals in the limestone can oxidize and create different hues of color.
What compound causes limestone rock to be yellow in colour?
Iron oxide can cause yellow to rust colored staining in limestone.
Which three substances are put into the blast furnace?
In a blast furnace, iron ore (Fe2O3), coke (carbon), and limestone (CaCO3) are commonly used. Iron ore is the source of iron, coke acts as a fuel and reduces the iron ore to iron, and limestone helps remove impurities by forming a slag.
Why is Limestone is used to purify sugar?
Limestone is used to purify sugar because it helps remove impurities like sulfur dioxide, which can affect the taste and quality of the sugar. Limestone reacts with sulfur dioxide to form calcium sulfite, which then precipitates out along with other impurities, leaving behind a purer sugar solution.
What colourcan iron rich limestone be?
yellow
What three raw materials are used to make pig iron?
The three raw materials used to make pig iron are iron ore, coke (a type of coal), and limestone. Iron ore is the primary source of iron, coke is used as a fuel and reducing agent, and limestone helps remove impurities from the iron ore during the smelting process.
What is the function of limestone in the furnace?
Limestone is added to the furnace as a flux to help remove impurities from the iron ore during the iron-making process. It reacts with the impurities to form slag, which can be easily removed from the molten iron.
Is the sphinx rusted?
No, the Sphinx is carved from limestone. Iron rusts, limestone doesn't rust. But its limestone is damaged, both by weathering and deliberate acts of man.
Why is limestone added to the blast furnace during the extraction of iron?
Limestone is added to the blast furnace during the extraction of iron to act as a flux. It helps to remove impurities, such as silica, from the iron ore by combining with them to form slag. The slag can then be easily separated from the molten iron.
