Why is coke used in a blast furnace?
Coke 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. Coke is commonly used as fuel for blacksmithing.
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Why coke is used in blast furnace not coal?
Coke is used as a fuel and a reducing agent in melting iron ore. It is produced by baking coal until it becomes carbon by burning off impurities without burning up the coal itself. When coke is consumed it generates intense heat but little smoke, making it ideal for smelting iron and steel.
Why is coke added in the 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.
What are the two functions of coke in blast furnace?
Coke serves multiple roles in the blast furnace. It acts as a reducing agent and source of reducing CO gas, a source of heat, a filter of dust and soot, a carburiser of hot metal and as a structural support material.
What is furnace coke used for?
Coke is a fuel used mainly in blast furnaces to reduce iron oxide to produce iron. It contains carbon, and is similar to coal. It is made from coal by cooking out things that are not carbon.
Why coke 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.
How much coke is used in blast furnace?
Modern hot blast cupolas are designed to operate with coke ratios of 14 to 16% and with a charge containing 60 to 65% steel scrap and 35 to 40% returns and no pig iron.
What is produced when coke is burned in a blast furnace?
Step 1 – Hot air (oxygen) reacts with the coke (carbon) to produce carbon dioxide and heat energy to heat up the furnace. Step 2 – More coke is added to the furnace and reduces the carbon dioxide into carbon monoxide, a good reducing agent. Step 3 – iron(III) oxide is reduced.
What are the two functions of coke in blast furnace?
Coke serves multiple roles in the blast furnace. It acts as a reducing agent and source of reducing CO gas, a source of heat, a filter of dust and soot, a carburiser of hot metal and as a structural support material.
Why coke is used instead of coal in blast furnace?
The single most important factor is strength ( mechanical compressive ); coal is heated to make coke, the resulting coke is stronger than the original coal. Also, coke helps to make the charge of iron oxides and limestone more porous to permit gas flow up and droplets of liquid iron and slag down.
Why coal Cannot be used in blast furnace?
In general, all blast furnace feed materials require some form of processing before being deemed suitable for blast furnace needs. ... Coal cannot be directly charged via the furnace top, it must first be transformed to coke. Raw materials are charged to the furnace in alternating layers of coke and ore.
Does blast furnace use coal?
The Blast Furnace is a members-only minigame situated in Keldagrim for smelting bars which require coal. The furnace here only requires half as much coal when smelting usually, so it can be useful when smelting the ores that require more coal.
What is the source of coke as used in a blast furnace?
Coke is produced by heating coal at high temperatures, for long periods of time. This heating is called “thermal distillation” or “pyrolysis.” In order to produce coke that will be used in blast furnaces, coal is usually thermally distilled for 15 to 18 hours, but the process can take up to 36 hours.
Why coke is used in blast furnace not coal?
Coke is used as a fuel and a reducing agent in melting iron ore. It is produced by baking coal until it becomes carbon by burning off impurities without burning up the coal itself. When coke is consumed it generates intense heat but little smoke, making it ideal for smelting iron and steel.
Is burning coke in a blast furnace?
Blast furnace ironmaking makes use of coke as the major source for both energy and reduction of iron oxides. In the blast furnace process, coke has multifunctions and plays an important role as reductant, burden support, and fuel.
What are the two functions of coke in blast furnace?
Coke serves multiple roles in the blast furnace. It acts as a reducing agent and source of reducing CO gas, a source of heat, a filter of dust and soot, a carburiser of hot metal and as a structural support material.
What is the function of blast furnace?
Blast furnaces are used to produce pig iron from iron ore for subsequent processing into steel, and they are also employed in processing lead, copper, and other metals. Rapid combustion is maintained by the current of air under pressure.
Why is coke used in a blast furnace?
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.
What is the function of coke during the process?
Coke is a grey, hard, and porous fuel with a high carbon content and few impurities, made by heating coal or oil in the absence of air—a destructive distillation process. It is an important industrial product, used mainly in iron ore smelting, but also as a fuel in stoves and forges when air pollution is a concern.
Why coke is used in blast furnace not coal?
Coke is used as a fuel and a reducing agent in melting iron ore. It is produced by baking coal until it becomes carbon by burning off impurities without burning up the coal itself. When coke is consumed it generates intense heat but little smoke, making it ideal for smelting iron and steel.
What is the purpose of coke in the furnace?
The main use of coke is to make iron. The burning of coal to coke produces carbon monoxide. A touch at the bottom of the furnace allows impurities to flow out of the furnace.
What are the two functions of coke in blast furnace?
Coke serves multiple roles in the blast furnace. It acts as a reducing agent and source of reducing CO gas, a source of heat, a filter of dust and soot, a carburiser of hot metal and as a structural support material.
How is coke for furnaces made?
Coke is produced by heating coal at high temperatures, for long periods of time. This heating is called “thermal distillation” or “pyrolysis.” In order to produce coke that will be used in blast furnaces, coal is usually thermally distilled for 15 to 18 hours, but the process can take up to 36 hours.