• The chemistry of steelmaking. Making iron.

    What do we need to make iron? Making iron is the first step in the production of steel. Iron is usually made from iron ore, coal and limestone - although some plants around the world have developed alternative methods of iron manufacture.These newer methods require slightly different raw materials but iron ore, coal and limestone remain the starting point for most …

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  • What is the purpose of limestone in a blast furnace?

    Answer (1 of 7): Lime stone – which is a sedimentary rock – is a valuable resource from the Earth''s crust. It has many uses. * It can be used as a building material. * It is used in the production of cement by heating powdered limestone with clay. Cement is an

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  • What''s the function of limestone and Coke when added to the …

    Answer (1 of 4): Limestone-Limestone undergoes calcination to form calcined lime in furnace temperature.Calcined lime reduces the liquidus temperature of impurities in raw material added in blast furnace thereby helps in easy removal of impurities in form of slag

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  • What is the use of coke in blast furnace? – Restaurantnorman

     · 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. Which is formed on burning coke

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  • Roasted iron ore is mixed with coke and limestone and smelted …

    168) Roasted iron ore is mixed with coke and limestone and smelted in blast furnace. Which among the following does not represent the correct answer about the reaction taking place in blast furnace? A) In the lower part, called zone of fusion temperature (1773 K), coke burns to CO 2 producing 97000 calories of heat

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  • How does limestone remove silica?

     · 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 raw materials require 6 to 8 hours to descend to the bottom of the furnace where they become the final product of liquid slag and liquid iron.

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  • Coal to Make Coke and Steel, Kentucky Geological Survey, Unive…

    What''s the function of limestone and Coke when added to ...

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  • Extraction of Iron | Metallurgy | Blast Furnace and Reactions

    This concentrated ore is mixed with limestone (CaCO 3) and Coke and fed into the blast furnace from the top. It is in the blast furnace that extraction of iron occurs. The extraction of iron from its ore is a long and subdued process, that helps in separating the useful components from the waste materials such as slag.

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  • what is the role of limestone in extraction of iron??

    5 Answers. The main role of limestone in extraction of iron is to decomposes in hot furnace and form the calcium oxide. Iron is extracted from its ore, haematite, in a blast furnace. The ore is fed into the top of the furnace along with coke and limestone. ... The limestone decomposes in the hot furnace, forming calcium oxide.

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  • How we make steel | British Steel

    Coke, iron ore, sinter and limestone are fed – or charged – into the top of the furnaces. A hot air blast of temperatures around 1,000 C is injected at the bottom of the furnace through nozzles called tuyeres. As the coke burns, temperatures higher than 2,000 C

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  • How iron is made

    The ingredients to make useable iron were limestone, ironstone, coke and air. The coke is the fuel and the ironstone provides the iron ore. Ironstone is first roasted in calcining kilns, located next to the blast furnaces, to remove impurities. The air, or blast, was blown into the blast furnace by powerful steam engines.

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  • Why is limestone added to the blast furnace during the extraction of iron…

     · The blast furnace is used for extracting iron from its ore. In summary, A mixture called the charge( iron ore-haematite, limestone-calcium carbonate, and …

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  • Extracting iron

     · Coke Carbon (C) Used as a fuel and reacts to form carbon monoxide (needed to reduce the iron(III) oxide) Limestone Calcium carbonate (CaCO 3) Helps to remove acidic impurities from the iron by ...

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  • Calcination of Limestone – IspatGuru

     · Limestone is usually associated with impurities like silica (SiO2), alumina (Al2O3), iron (Fe), sulphur (S) and other trace elements. The chemical reactivity of various limestones also shows a large variation due to the difference in crystalline structure and the nature of impurities such as SiO2, Al2O3, and Fe etc.

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  • Coal and Coke are used as fossil fuel | apdinfomedia

     · The coke producing process of coal carbonization is normally applicable in iron and steel industry. This makes it a source of domestic fuel which is smokele ss. Coke is used chiefly to smelt iron ore and other iron bearing materials in blast furnaces, acting both as a source of heat and as a chemical reducing agent, to produce pig iron, or hot metal.

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  • What is the use of coke in the blast furnace?

     · Answer: Coke is primarily used to smelt iron ore and other bearing materials in blast furnaces, acting both as a source of heat and as a chemical reducing agent to produce pig iron or hot metal. Coke, iron ore and limestone are fed into blast furnaces, which runs continuously.

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  • Iron Ore Sinter

    Sinter plant: Prior to sending iron ore it is sintered at the sintering plant along with limestone and some coke. Here fines are agglomerated into lumps. 5. Coke oven battery: Coal is converted to coke in a coke oven battery to remove volatile matter by baking coal

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  • Effect of adding limestone on the metallurgical properties of iron ore …

     · One of the most common fluxing materials for iron ore pellet production is limestone, which is mainly calcium oxide (CaO). In this study, the effect of adding limestone on the metallurgical properties (reducibility, swelling, cracking, softening temperature, Low-Temperature Disintegration, Cold Crushing Strength) of acid iron ore pellets was investigated …

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  • How Iron and Steel Works Blast Furnace Ore Coke Limestone/ …

     · How blast furnace works a mixture of ore coke called sinter and limestone. what type of steel, carbon content and weldability.Piping,Welding,Non Destructive ...

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  • What is the role of coke in a blast furnace?

    Answer (1 of 6): Metallurgical has has following function in BF 1 ke is the main fuel in furnace. Pulverised coal injection is also used as fuel in addition to coke. 2 ke is agent for reduction of iron ore to iron in furnace. Coke is involved in direct reduction whereas

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  • Processes and Procedures in the Extraction of Iron

     · The iron ore is first roasted in air to produce iron(III) oxide which is mixed with coke and limestone and then further heated to a very high temperature in a blast furnace. These materials are loaded into the blast furnace from the top while a blast of hot air is introduced into it from beneath via small pipes known as tuyeres.

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  • Iron Smelting, Charcoal, Coke, Limestone, DF

     · 86 second clip from a documentary, explaining briefly charcoal, coke, iron smelting, and why Limestone is used. Explains & shows why limestone is used as fl...

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  • Uses of Limestone

    The use of limestone in steel making along with iron ore and coke is also quite popular. In its pulverized form, it is used as a soil conditioner to neutralize highly acidic soil. Additionally, the erosional landforms carved out of limestone rock, known as karst in geology, play an important role in natural landscaping.

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  • Coal to Make Coke and Steel, Kentucky Geological Survey, …

     · The coke is mixed with iron ore and limestone to make molten iron, which is then further treated and heated to make steel. Generalized diagram showing how steel is made. In the steel-making process, coke is used in the blast furnace as a (1) fuel to produce added heat; (2) chemical-reducing agent for the reduction of iron oxides; and (3) as a permeable support in …

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  • What is the role of limestone during the extraction of iron from haematite …

    During the extraction of iron from haematite ore, limestone acts as a flux. Limestone decomposes froming CaO which reacts with silica forming slag. C a C O 3 → C a O + C O 2 C a O + S i O 2 → C a S i O 3 (s l a g)

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  • Lecture 29: Exercises in materials Balance in iron making Contents …

    smelting of iron ore, coke and limestone. The analysis is as follows: C and 10% S and 4% Al 6 O 7; Amount is 600 Kg per ton of pig iron ne : pure CaCO 7 to produce a slag Iron ore : Fe 6 O 7 78%,SiO 6 8%,Al 6 O 7 5%,MnO 2% H 6 O 7% Coke : 86% ...

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  • What is the role of limestone during the extraction of iron from …

    During the extraction of iron from haematite ore, limestone acts as a flux. Limestone decomposes froming CaO which reacts with silica forming slag. C a C O 3 → C a O + C O 2 C a O + S i O 2 → C a S i O 3 (s l a g)

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  • Uses of Limestone

    The use of limestone in steel making along with iron ore and coke is also quite popular. In its pulverized form, it is used as a soil conditioner to neutralize highly acidic soil. Additionally, the erosional landforms carved out of limestone rock, …

    Read More
  • Effect of adding limestone on the metallurgical properties of iron …

     · One of the most common fluxing materials for iron ore pellet production is limestone, which is mainly calcium oxide (CaO). In this study, the effect of adding limestone on the metallurgical properties (reducibility, swelling, cracking, softening temperature, Low-Temperature Disintegration, Cold Crushing Strength) of acid iron ore pellets was investigated using a …

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  • LECTURE NOTES ON IRON MAKING SUBJECT CODE: PCMT 4307

    crucible-like hearth. Iron-bearing materials (iron ore, sinter, pellets etc.), coke and flux (limestone and dolomite) are charged into the top of the shaft. A blast of heated air and also, in most instances, a gaseous, liquid or powdered fuel are introducedof the

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  • What Is The Role Of Coke In The Extraction Of Iron?

    State the role of lime stone in the extraction of iron from haematite. Or Why is lime stone added during the extraction of iron? Last Answer : Limestone reacts with the sand present as impurity in the ore forming calcium silicate which is taken out of the blast furnace as slag.

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  • Limestone and Dolomite and their Use in Iron and Steel Plant – …

     · Limestone and lime products are used as fluxing material both in ironmaking and in steelmaking. Basically limestone is used as a slag former, while dolomite is used as a slag former, slag modifier and as a refractory material. The process of iron making is the reduction of iron ore to produce iron.

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  • Limestone – Its Processing and Application in Iron and Steel …

     · Limestone is also one of the vital raw materials used in production of iron and steel. Limestone, by definition, is a rock that contains at least 50 % of CaCO3 in the form of calcite by weight. There can be small particles of quartz (silica), feldspar (alumino-silicates), clay minerals, pyrite (iron sulphide), siderite (iron carbonate), and ...

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