In a blast furnace, fuel (coke), ores, and flux (limestone) are continuously supplied through the top of the furnace, while a hot blast of air (sometimes with oxygen enrichment) is blown into the lower section of the furnace through a series of pipes called tuyeres, so that the chemical reactions take place throughout ...
What raw materials are added to the blast furnace?
The three main raw materials used to make pig iron (which is the raw material needed to make steel) for primary steel production in a blast furnace are the processed iron ore, coke (residue left after heating coal in the absence of air, generally containing up to 90% carbon) and limestone (CaCO 3 ) or burnt lime (CaO) , ...
What is added at the top of a blast furnace?
The production of iron requires three important raw materials: iron ore, coal converted to “coke”, and limestone. The coal is converted to a product called coke in coking ovens. The three raw materials are added to the top of the blast furnace. ... The slag floats on top of the molten iron and can be drawn off separately.
What 3 products were put into the blast furnace?
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.
What 3 ingredients are required to make steel in a blast furnace ‘?
Blast furnace
To make pure steel, iron and carbon are needed.
What are the raw materials they use?
Examples of raw materials include steel, oil, corn, grain, gasoline, lumber, forest resources, plastic, natural gas, coal, and minerals . Raw materials can be direct raw materials, which are directly used in the manufacturing process, such as wood for a chair.
What are the raw materials used to make Ikkat sarees?
The raw materials used to make Ikat sarees are silk, cotton, and dye colors . Silk is a rare material used to make silk saris, and cotton threads are used to weave a variety of items.
What is the hottest furnace on earth?
The current official highest registered air temperature on Earth is 56.7 °C (134.1 °F), recorded on 10 July 1913 at Furnace Creek Ranch , in Death Valley in the United States.
Why is coke used in a 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.
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 it called a blast furnace?
The Blast Furnace is a large steel structure about 30 metres high. It is lined with refractory firebricks that can withstand temperatures approaching 2000 o C. The furnace gets its name from the method that is used to heat it . Pre-heated air at about 1000 o C is blasted into the furnace through nozzles near its base.
Which oxygen is used for blast furnace operation?
More than half the world’s steel is produced in the basic oxygen process (BOP), which uses pure oxygen to convert a charge of liquid blast-furnace iron and scrap into steel.
Which fuel is best suitable for blast furnace process?
Which fuel is best suitable for blast furnace process? Explanation: Coke is best suitable for blast furnace process as it also acts as a reducing agent in smelting iron ore.
How steel is made in 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.
Which is closest to the purest form of the iron?
> The purest form of iron is Wrought iron .
Which reaction is used to increase the temperature inside the blast furnace?
Of these only the reaction between oxygen and carbon is exothermic . This reaction is responsible for increasing the temperature of the blast furnace so that the other reactions between the carbon compounds and iron oxide can take place.
