What is the purpose of iron ore in a blast furnace?
Coke, limestone flux, and iron ore (iron oxide) are charged into the top of the furnace in a precise filling order which helps control gas flow and the chemical reactions inside the furnace.
Why are high temperatures needed to extract iron?
The hot air blast to the furnace burns the coke and maintains the very high temperatures that are needed to reduce the ore to iron. The reaction between air and the fuel generates carbon monoxide. This gas reduces the iron (III) oxide in the ore to iron.
How does an iron blast furnace work?
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. The hot air that was blown into the bottom of the furnace ascends to the top in 6 to 8 seconds after going through numerous chemical reactions.
What is the source of heat in blast furnace?
It is a type of heat exchanger, in which the heat produced by combustion of the BF gas usually mixed with natural gas (NG) or coke oven gas (COG) is stored in the checkerwork chamber, after which cold air is blown through the hot checkerwork to produce the preheated hot air blast to the furnace.
What are the chemical reactions in a blast furnace?
The reactions of the blast furnace involve 1) combustion of the fuel and its conversion into carbon monoxide, 2) reduction of the ore, and 3) formation of slag. A reaction such as FeO + CO = Fe + CO2 can occur in both the forward and backward direction under conditions existing somewhere in the blast furnace.
How is iron removed from a blast furnace?
The blast furnace Iron is extracted from iron ore in a huge container called a blast furnace. In this reaction, the iron(III) oxide is reduced to iron, and the carbon is oxidised to carbon dioxide.
How is steel made in a blast furnace?
To make steel, iron ore is first mined from the ground. It is then smelted in blast furnaces where the impurities are removed and carbon is added. About halfway down, limestone begins to react with impurities in the ore and the coke to form a slag. Ash from the coke is absorbed by the slag.
Why is Coke added to the blast furnace?
Carbon is more reactive than iron, so it can displace iron from iron(III) oxide. Step 2 – More coke is added to the furnace and reduces the carbon dioxide into carbon monoxide, a good reducing agent.
Is KFC a trade secret?
It is purported that the recipe of Colonel Harland sanders finger-licking is known to only 2 KFC executives….Trade Secrets and Patents: Everything You Need To Know.
| Patents | Trade Secrets |
|---|---|
| Patent protects new and useful invention | Trade secret protects valuable and secret information |
What’s the secret recipe for a Krabby Patty?
It is revealed that in “Friend or Foe,” a pinch of chum is present in this formula. In “The Great Patty Caper,” at least 2 ingredients are confirmed: flour, barnacle shavings. And 2 possible ingredients are salt, and turmeric.