AnswersDriveCoke is used as a fuel and as a reducing agent in smelting iron ore in a blast furnace. The carbon monoxide produced by its combustion reduces iron oxide (hematite) in the production of the iron product.
Similarly, you may ask, how is iron produced in a blast furnace?
The purpose of a blast furnace is to chemically reduce and physically convert iron oxides into liquid iron called "hot metal". The blast furnace is a huge, steel stack lined with refractory brick, where iron ore, coke and limestone are dumped into the top, and preheated air is blown into the bottom.
1
What is the difference between coal and coke?
Coal is a natural occurring substance whereas Coke prepared material with few impurities and high Carbon content, usually made from Coal. 2. Coal has a Volatile matter content whereas Coke has relatively very low Volatile matter content which suits it for a better fuel.
2
Is coke used to make steel?
It comes out as hard and porous concentrated carbon. It's combined with iron ore and limestone at the top of a blast furnace — a huge, steel stack lined with refractory brick. Preheated air is blown into the bottom. The coke produces the heat in the blast furnace.
3
How coke is used to make steel?
Firstly coal is converted to lump coke in a coking oven. A particular rank of coal, known as “coking coal”, is required to make the preferred quality of coke. Then raw iron is made by reducing (removing the oxygen from) iron ore (iron oxide) by reacting it at high temperature with coke in a blast furnace.
4
Why is Coke used instead of coal?
Coke is a fuel with very low impurities and high carbon content. Usually coke is obtained by destructive distillation of bituminous-coal. So, if coal is used in smelting instead of coke the higher impurities content of coal will real with the molten iron formed and would result in undesirable products.
5
Why is it called a blast furnace?
The purpose of a blast furnace is to chemically reduce and physically convert iron oxides into liquid iron called "hot metal". The blast furnace is a huge, steel stack lined with refractory brick, where iron ore, coke and limestone are dumped into the top, and preheated air is blown into the bottom.
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How hot is a blast furnace?
The hot blast is directed into the furnace through water-cooled copper nozzles called tuyeres near the base. The hot blast temperature can be from 900 °C to 1300 °C (1600 °F to 2300 °F) depending on the stove design and condition. The temperatures they deal with may be 2000 °C to 2300 °C (3600 °F to 4200 °F).
7
What is the use of limestone in a blast furnace?
This molten iron can be tapped off from the bottom of the furnace. Iron ore often has silicon dioxide (sand) impurity which must be removed during the process. To do this limestone is added to the charge. The limestone (chemically, calcium carbonate) decomposes in the heat of the furnace to calcium oxide.
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How iron is produced in a blast furnace?
Iron is extracted from iron ore in a huge container called a blast furnace. Iron ores such as haematite contain iron oxide. The oxygen must be removed from the iron oxide to leave the iron behind. Reactions in which oxygen is removed are called reduction reactions.
9
Why is most iron converted into steel?
Iron and steel. Pure iron is soft and easily shaped because its atoms are arranged in a regular way that lets layers of atoms slide over each other. Pure iron is too soft for many uses. Iron from the blast furnace is an alloy of about 96 percent iron, with carbon and some other impurities.
10
What is added to a blast furnace to remove impurities?
GCSE CHEMISTRY - Extraction of Iron in the Blast Furnace - Impurities - Limestone and Slag - GCSE SCIENCE. to the blast furnace to remove the impurities in the iron ore. to give calcium oxide (quicklime) and carbon dioxide. The main impurity is silica (sand or rock) which is silicon dioxide.
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What is a blast furnace and how does it work?
Blast furnaces such as the two in Wales are huge steel stacks lined with brick. Iron ore, coke and limestone are dumped in the top, and preheated air is blown or blasted into the bottom of the chamber. This process, through various chemical reactions, produces liquid iron — or hot metal as it sometimes called.
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Is Iron stronger than steel?
Steel is a mixture of several metals (this is called an alloy) but most of it is iron. Steel is harder and stronger than iron. Steels are often iron alloys with between 0.02% and 1.7% percent carbon by weight. Alloys with more carbon than this are known as cast iron.
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How steel is made from iron ore?
Fine-grained iron ore is processed into coarse-grained clumps for use in the blast furnace. Coal is cleaned of impurities in a coke furnace, yielding an almost pure form of carbon. A mixture of iron ore and coal is then heated in a blast furnace to produce molten iron, or pig iron, from which steel is made.
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Is charcoal is a fossil fuel?
The methane and carbon monoxide released during charcoal production have short atmospheric lifetimes compared with that of fossil fuel carbon dioxide. In the long run, the net effect of charcoal on the climate is nil because the wood used to produce charcoal was formed from carbon dioxide by photosynthesis.
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How is cast iron made?
Cast iron, an alloy of iron that contains 2 to 4 percent carbon, along with varying amounts of silicon and manganese and traces of impurities such as sulfur and phosphorus. It is made by reducing iron ore in a blast furnace.
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What metals make steel?
While iron alloyed with carbon is called carbon steel, alloy steel is steel to which other alloying elements have been intentionally added to modify the characteristics of steel. Common alloying elements include: manganese, nickel, chromium, molybdenum, boron, titanium, vanadium, tungsten, cobalt, and niobium.
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Can you recycle steel?
Iron needs to be superheated to approximately 1,700 C before it can be turned into steel. Steel is 100% recyclable and can be recycled an infinite amount of times, saving energy and raw materials each time it is re- processed.
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What metal is often extracted and purified from its ore using both smelting and electrolysis?
Copper can be extracted from its ore by heating it with carbon. Impure copper is purified by electrolysis in which the anode is impure copper, the cathode is pure copper and the electrolyte is copper sulphate solution. An alloy is a mixture of two elements, one of which is a metal.
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How did they discover steel?
The Bessemer process was the first inexpensive industrial process for the mass-production of steel from molten pig iron. Independently discovered in 1851 by William Kelly, the process had also been used outside of Europe for hundreds of years, but not on an industrial scale.