Why coke is used in blast furnace?
Publisher Summary. Metallurgical coke, along with iron ore and limestone, is layered into a blast furnace to convert the iron ore to metallic iron. Coke, which is mostly carbon, reacts with the blast air to produce carbon monoxide, which, in turn, reacts with the iron oxide to produce carbon dioxide and metallic iron.
Likewise Which industry produces blast furnace slag? This molten iron product can be cast into iron products, but is most often used as a feedstock for steel production . Blast furnace slag is a nonmetallic coproduct produced in the process.
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User Guidelines for Waste and Byproduct Materials in Pavement Construction.
| Property | Value |
|---|---|
| Los Angeles Abrasion (ASTM C131) | 35 – 45% |
Why is limestone added to the blast furnace? Limestone is also used to remove impurities from the blast furnace when making iron. The impurities are mostly silicon dioxide (also known as sand). The calcium carbonate in the limestone reacts with the silicon dioxide to form calcium silicate (also known as slag).
Also Does coke burn hotter than coal?
Coal is a shiny, black fossil fuel that contains impurities, emits smoke when burned, and produces less heat than coke. Coke is a dull, black byproduct of coal that burns hotter and cleaner.
What is nut coke?
Nut Coke means coke otherwise meeting the quality specifications in Schedule A and of a size equal to or greater than 3/8 inch and less than 3/4 inch. Save. Copy.
How much does slag cost? In unground form, granulated slag sells for about $35 per ton and sells for about twice that amount as GGBFS (table 2). This is in contrast to a range of about $3 to $14 per ton for air-cooled slag; the prices are necessarily low to allow the material to compete with natural aggregates.
What is the main use of slag? Due to its positive technical characteristics, LD slag is used all over the world in road and railway construction and for engineering. The most common use is as an aggregate in the manufacture of asphalt. It is also successfully used as an aggregate for concrete.
How pig iron is produced in blast furnace? Blast furnaces produce pig iron from iron ore by the reducing action of carbon (supplied as coke) at a high temperature in the presence of a fluxing agent such as limestone.
Why calcium carbonate is used in blast furnace?
The Chemistry of the blast furnace. … Limestone is calcium carbonate (CaCO3) and it is added to the blast furnace to remove the impurities in the iron ore, as mentioned above. Calcium carbonate is decomposed by heat in the furnace to give calcium oxide (quicklime) and carbon dioxide.
What is extraction of iron? Iron is extracted from iron ore in a huge container called a blast furnace. Iron ores such as haematite contain iron(III) oxide, Fe 2O 3. The oxygen must be removed from the iron(III) oxide in order to leave the iron behind. Reactions in which oxygen is removed are called reduction reactions.
What is in pig iron?
Pig iron is the product of smelting iron ore (also ilmenite) with a high-carbon fuel and reductant such as coke, usually with limestone as a flux. Charcoal and anthracite are also used as fuel and reductant. Pig iron is produced by smelting or iron ore in blast furnaces or by smelting ilmenite in electric furnaces.
Why coke is not used as fuel? Answer: because fuel has different properties than coke as fuel can help a car move and coke can’t do do that as it does not have the chemicals to complete that task …
In what respect coke is different from coal?
Difference between coal and coke (5 points)
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Coal is a lustrous, black fossil fuel that includes impurities, generates smoke, and generates less heat than coke when burned. Coke is a dingy, black coal waste that burns hotter and cleaner.
What is hard coke?
Hard coke is made from coal and has lesser impurities and high carbon content. Being an excellent source of heat, it is used in blast furnaces and boilers. Hard coke factories were getting coal at a notified price from Coal India under the five-year FSA from 2013-18, which was extended till June this year.
What is coke breeze? Definition of coke breeze
: a fine coke separated by screening from the larger sizes before or after crushing.
What is blast furnace process? blast furnace, a vertical shaft furnace that produces liquid metals by the reaction of a flow of air introduced under pressure into the bottom of the furnace with a mixture of metallic ore, coke, and flux fed into the top. … Rapid combustion is maintained by the current of air under pressure.
How much is a truckload of slag?
Steel Slag Rock Cost. Steel slag costs $25 to $39 per ton or $35 to $54 per yard, depending on the quantity ordered and size of stones. Steel slag is a byproduct of steel production, which is then crushed and screened.
What type of rock is slag? Steel slag is a calcium silicate which comes from a renewable source, making it the Green mineral alternative to quarried rock such as limestone.
What is the cheapest rock for landscaping?
These are the top three commonly used cheap rocks for landscapes and their costs: Crushed Granite – $50 to $70 per cubic yard. Pea Gravel – $2 to $3 per bag. River Rocks – $0.05 to $0.35 per pound.
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Now, let’s discuss each one in detail:
- Crushed Granite Landscape Rocks. …
- Pea Gravel Landscape Rocks. …
- River Rocks for Landscaping.
What exactly is slag? Slag is the collection of compounds that are removed. In many smelting processes, oxides are introduced to control the slag chemistry, assisting in the removal of impurities and protecting the furnace refractory lining from excessive wear. In this case, the slag is termed synthetic.
Is slag a rock?
Slag is a byproduct of steel production and is similar in character to volcanic rocks such as basalt and granite. Slag is primarily used in the cement and construction industries, and largely in road construction. Slags are one of the most natural products of all.
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• Dec 18, 2013
Is blast furnace slag toxic? When SSRS compares with ground granulated blast furnace slag (GGBFS) from iron making, steel slag contains toxic ingredients such as nickel, cadmium, chromium and strontium. These compounds could be harmful not only for environment but also for human health [9,10].
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