Describe How to Produce Pig Iron Using the Blast Furnace

The structure of a blast furnace. By using waste exhaust heat to preheat combustion air the amount of fuel to make a unit of pig iron was reduced at first by between one-third using coal or two-thirds using coke.

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Known as reducing this can be done either in the blast furnace where hot air is injected into a continuous feed of coke sinter and lime or by the direct reduced iron DRI process.

. In modern age the attempts are made to modify it or to adopt new methods of manufacturing pig-iron mainly for two reasons. Either way the fundamental activity in iron making involved a worker stirring small batches of pig iron and cinder until the iron separated from the slag. Bosh area of the furnace where the burden starts to soften and melt - direct.

The Haematite reacts with Carbon in the cast iron to give pure iron and carbon monoxide gas which escapes. Hot air is forced through tuyeres openings. In a blast furnace fuel ores and flux are continuously supplied through the top of the furnace while a hot blast of air sometimes with.

A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals generally pig iron but also others such as lead or copper. Iron is extracted from its ore in a blast furnace. In general it is used to produce Pig iron from its ore.

Impurities such as S Si pass into the slag and the slag later can be easily separated to yield pure iron. Carbon is reacted with Haematite to produce pure iron and carbon monoxide gas which escapes. Pig iron has a very high carbon content typically 3847 along with silica and other constituents of dross which makes it very brittle and not useful directly as a material except for limited applications.

The Separation Of Iron-. Before iron ore can be used oxygen must be removed from it. After iron ore is mined it is send to the blast furnace.

1 Combustion process 2 Boudouard reaction 3 Preheating 4 Indirect reduction zone 5 Direct reduction zone 6 Carburizing zone 7 Melting zone 8 Tapping zone Combustion process. They are then used to help heat the air blast required if blast furnace is to reach the high temperatures needed to produce molten iron. The blast furnaces help to save fuel from 82 to 87 MJt-HM which are installed in the industries.

Test your Knowledge on Iron extraction blast furnace metallurgy. This problem has been solved. In the blast furnace the iron ore reacts with the carbon contained in the coke to form grey or white pig iron.

To create pig iron in the blast furnace we need iron ore and coke. Pig iron is supplied in a variety of ingot sizes and weights ranging from 3 kg up to more than 50 kg. It is made by heating cast iron in a furnace lined with Haematite Fe2O3.

Molten iron ore is tapped at the bottom of the blast furnace poured into the iron ladle and removed for use. New improved technologies have recently been introduced in. Iron ores such as haematite contain iron III.

Blast refers to the combustion air being forced or supplied above atmospheric pressure. Coke limestone and iron ore are fed into the top of the furnace. Pig iron is produced by smelting or iron ore in blast furnaces or by smelting ilmenite in electric furnaces.

Upper part of the furnace - free moisture is driven off from the burden materials and hydrates and carbonates are disassociated. Lower part of the blast furnace shaft - indirect reduction of the iron oxides by carbon monoxide and hydrogen occurs at 700-1000C. The result from both is liquid iron which is then transported to the basic oxygen furnace.

The capacity of present day modern blast furnaces has gone upto 100000 or more kN of pig-iron per day. The blast furnace process also produces two. Slag also helps in soil stabilization.

Iron ore may contain contaminants that must be removed by adding flux. Pig iron also known as crude iron is an intermediate product of the iron industry in the production of steel which is obtained by smelting iron ore in a blast furnace. Identify the three ingredients used in a blast furnace to make pig iron.

I The height of modern blast furnace has increased. The oxide ores are reduced to iron by removing the oxygen from them. At the beginning of the use of the electric furnace for the manufacture of calcium carbide and ferro-alloys experimental work was conducted in it upon the production of steel from iron ore.

Called puddling this was highly skilled work but was also hot strenuous and dangerous. Key steps of the process are as follows. The stock level is constantly topped up.

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. Now this carbon monoxide that is unstable reacts with the ore to form carbon dioxide and iron. Hot blast patented by James Beaumont Neilson in 1828 was the most important development of the 19th century for saving energy in making pig iron.

The raw materials mix or charge enters the furnace from the top and hot air is blown or blasted from the bottom causing the coke to burn and the oxygen to combine with carbon in the coke to form carbon monoxide. Limestone is then added as flux and it creates the slag. A typical blast furnace is a cylindrical shaft furnace with a refractory lining on the inside.

The mini blast furnace process is an efficient route to produce pig iron based on the burden with granulated charcoal. F e 2 O 3 3 C 2 F e 3 C O After that limestone is added as flux and slag is created. Other Methods Of Pig-Iron Manufacture.

Iron Ore and Coke Form Pig Iron in the Blast Furnace. The slag is removed at the tap hole. The vast majority of pig iron is produced.

The slag of the blast furnace has hydraulic properties which are used in cement as a additives. It is used in process plants. The mixture of iron ore flux and sometimes scrap metal is called a burden.

Historically iron was produced by the hot-blast method or later the anthracite furnace. See the answer See the answer See the answer done loading. Extracting iron The blast furnace Iron is extracted from iron ore in a huge container called a blast furnace.

For many years steel and wrought iron have been produced directly from ore on a small scale in the forge crucible and reverberatory furnaces. Identify the three ingredients used in a blast furnace to make pig iron. Advantages of Blast Furnace.

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