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Why is cast iron more brittle than mild iron?
Brittle because it contains impurities such as carbon and sulfur. The structure of the molecules in iron, particularly when cast, is such that it is almost crystalline in nature and breaks easily. The addition of carbon and other metals into the mix gives you more malleable compounds that are less brittle and can convert it to what we refer to as steel.
When oxygen is blown into pure iron to remove impurities Wont it react with Iron itself to give iron oxide?
Oxygen is not blown into pure iron, it is blown into molten iron ore (many impurities) and coke has been added to the mix as well. the coke reacts with the impurities and the oxygen to purify the iron ore.
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.
What do iron impurities react with and what does it form?
Iron impurities can react with oxygen from the air to form iron oxide, commonly known as rust. This reaction occurs due to the oxidation of iron atoms in the presence of moisture and oxygen. Rust can weaken the iron structure and cause it to deteriorate over time.
What is the method for purifying iron?
After iron ore is mined it is crushed into a powder then injected into a blast furnace. Under the extreme temperatures the ore melts and since iron is more dense than the impurities, it sinks to the bottom. This leaves a film of "slag" (impurities) on top. The slag is then skimmed off so only the metal remains.
What is cast iron made of?
Cast iron is mostly made of iron or an iron alloy. It typically also has some silicon and manganese, along with trace amounts of impurities like sulfur.
What is cast made of?
Cast iron is mostly made of iron or an iron alloy. It typically also has some silicon and manganese, along with trace amounts of impurities like sulfur.
What is the Bessemer Machine?
It isn't so much a machine. It is a method. It is used to make iron into steel. Iron has impurities and Bessemer found out that if you pump air into the iron it removes the impurities and it becomes steel.
What types of iron is there?
pig iron, wrought iron and cast iron. These are broad classifications used commercially, they can be subclassified. Chemically we say that its pure or impure, contains sulphur/phosphorous/impurities(slag, etc.)/carbon in so and so % range
Why is cast iron more brittle than mild iron?
Brittle because it contains impurities such as carbon and sulfur. The structure of the molecules in iron, particularly when cast, is such that it is almost crystalline in nature and breaks easily. The addition of carbon and other metals into the mix gives you more malleable compounds that are less brittle and can convert it to what we refer to as steel.
How did the Bessemer process allow better use of iron ore?
A faster and more affordable way of making steel, using air blown in through the iron that caused impurities to burn off.
When oxygen is blown into pure iron to remove impurities Wont it react with Iron itself to give iron oxide?
Oxygen is not blown into pure iron, it is blown into molten iron ore (many impurities) and coke has been added to the mix as well. the coke reacts with the impurities and the oxygen to purify the iron ore.
Why is the cast iron obtained from the blast furnace is treated further to produce steel?
It's not. PIG iron from the blast furnace is treated further to produce steel. Cast iron is a product made from only iron, like a cast iron frying pan. When they make a cast iron frying pan, it's ready to be sold and used. Pig iron is sent to steel mills and converted to steel.
What impurities are present in iron ore?
Common impurities found in iron ore include silica, alumina, phosphorus, and sulfur. These impurities can affect the quality of the iron produced during the smelting process and need to be minimized through various beneficiation techniques.
What is the process called to make iron?
The process to make iron from iron ore is called iron smelting. Iron ore is heated in a blast furnace with coke (carbon) and limestone to remove impurities and extract the iron metal. The resulting product is molten iron, which is then cast into various shapes for use in manufacturing.
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.
Is iron ore homogeneous?
no because it contains impurities
