why limestone is charged in blast furnace

Steel Making & Blast Furnace - SlideShare

Jan 28, 2016· Three substances are needed to enable to extraction of iron from its ore. The combined mixture is called the charge: Iron ore, haematite - often contains sand with iron oxide, Fe2 O3 . Limestone (calcium carbonate). Coke - mainly carbon The charge is placed a giant chimney called a blast furnace. The blast furnace is around 30 metres high and ...

why limestone is charged in blast furnace

limestone used in blast furnace why limestone is charged in blast furnace Smelting furnace used to extract metals from their ores, Why is limestone add to blast furnace - answers The first thing required is a blast furnace, which is filled with iron ore, coke, and crushed limestone Then it is fired and a strong air blast is blown upwards

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HOW A BLAST FURNACE WORKS - Foundry Gate

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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Blast furnace - The Full Wiki

A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally iron.. In a blast furnace, fuel and ore are continuously supplied through the top of the furnace, while air (sometimes with oxygen enrichment) is blown into the bottom of the chamber, so that the chemical reactions take place throughout the furnace as the material moves downward.

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limestone processing blast furnace

A Blast furnace is a gigantic, steel stack lined with refractory brick where the concentrated iron ore, coke, and limestone are dumped from the top, and a blast of hot air is blown into the bottom. All the three ingredients are crushed into small round pieces and mixed and put on a

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Blast Furnace and Process Description - Chemical ...

Jul 12, 2019· The raw materials iron ore, coke, and limestone is charged into the furnace from the top through the throat. The iron oxide (ore) Fe2O3 is reduced mainly by the ascending CO. The reduction of the iron ore takes place and is converted into final hot metal.

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Materials needed for Steel Production in Basic Oxygen Furnace

Oct 16, 2015· The sulphur level of hot metal can be reduced to as low as 0.001 % in a hot metal desulphurization plant. The composition of the hot metal depends on the practice and charge in the blast furnace. Generally, there is a decrease in the silicon content and an increase in the sulphur of the hot metal when the blast furnace runs on colder regime.

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Limestone and dolomite flux and their use in iron and ...

May 08, 2013· Limestone and dolomite flux and their use in iron and steel plant. Limestone is a naturally occurring mineral. The term limestone is applied to any calcareous sedimentary rock consisting essentially of carbonates. The ore is widely available geographically all over the world. Earth''s crust contains more than 4 % of calcium carbonate.

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why limestone and dolomite using during ... - BINQ Mining

Jun 30, 2013· Iron & steel – British Lime Association (BLA) part of the Mineral .. Thus the main slag former in iron making is limestone, or dolomite rather . Iron ore pellets contain slagforming components, and are fed directly to the blast furnace. Iron ore fines are .

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Steel - Open-hearth steelmaking | Britannica

Bulk materials, such as scrap, cold blast-furnace iron, ore, limestone, coke, and alloying agents, are charged through the furnace doors in small boxes of one- to two-cubic-metre capacity. The boxes are brought to the OHF on small railroad buggies, and a charging machine then moves one box after another through a door, turns them over, and dumps their contents onto the hearth.

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Blast Furnace 101 - Welcome to The Lawrence Register

How A Blast Furnace Operated Stock Yard – Where raw materials were stored and kept dry. Charging House – Where the furnace is "charged" (loaded full of materials). Charge – Charging the furnace meant layering it with iron ore, limestone, and charcoal (or coke), in 0.5 to 1.5 inch pieces.

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(PDF) NEW CHARGE MATERIAL FOR BLAST FURNACE 1

NEW CHARGE MATERIAL FOR BLAST FURNACE 1. ... The metallurgical properties of brex have made it possible to increase the brex content of the charge to , eliminate limestone from the charge, and ...

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Blast Furnace Cement - an overview | ScienceDirect Topics

In Building Materials in Civil Engineering, 2011. 4.2.3 Portland Blast Furnace Cement. Portland blast furnace cement (simply called slag cement) refers to the hydraulic binding material ground by mixing Portland cement clinker, granular blast furnace slag, and appropriate amount of gypsum, code-named P • S. The mixed amount of granular blast furnace slag in cement is 20% ~ 70% by weight.

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Production of iron and steel - SlideShare

Apr 27, 2015· 4/27/2015 13 IRON MAKING -- summary • Vertical shaft furnace, called a blast furnace •Iron ore, coke, and limestone are charged, •Hot air ( ~1200 0C) is pumped into the bottom of the blast furnace, •Limestone attracts impurities, a "slag" forms and floats on top of the molten iron, •Iron is drawn off, or "tapped", and poured ...

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Blast Furnace Slag - Material Description - User ...

In the production of iron, iron ore, iron scrap, and fluxes (limestone and/or dolomite) are charged into a blast furnace along with coke for fuel. The coke is combusted to produce carbon monoxide, which reduces the iron ore to a molten iron product.

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Blast furnace revision Flashcards | Quizlet

why is limestone added? to remove impurities. ... what is the equation for the removal of impurities in a blast furnace from iron oxide? CaO + SiO2 > CaSiO3. what happens to the limestone when added to the blast furnace? it is thermally decomposed. what is limestone decomposed into and why?

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Chapter 10 Industrial Inorganic Chemistry Review ...

1) The charge is sintered to make sure the solids mix well 2) Blasts of hot air are sent through holes near the bottom of the furnace 2.1) the carbon burns strongly at the base of the furnace in the air blast and the furnace gets very hot reaching temperatures of 1900°C C + O₂ → CO₂ carbon+oxygen→carbon dioxide

Why is limestone added to a blast furnace during the ...

May 20, 2010· Limestone is added to the blast furnace to remove impurities (such as as sand (Silicon Dioxide)) from the iron ore. The lime then reacts with the sand to form ''slag''. The slag is then removed from the furnace as it is molten and can be tapped off. Hope it helps....

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Blast Furnace - ScienceAid

Blasts furnaces are used for smelting during the production of metals such as iron, lead, zinc, and copper. A blast furnace works by blasting hot air up through the furnace while fuels, limestone, and ore move continuously through the top of the furnace. The method used in .

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What is the use of limestone in a blast furnace? | Yahoo ...

Sep 16, 2008· The formula is CaO + SiO(2) = CaSiO(3). This is molten at blast furnace temperatures and floats on top of the molten iron. It is then removed and cooled into hardened slag. Thus, the lime from limestone combines with the silica and allows the separation of the iron from the silica impurities.

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Iron Ore Processing for the Blast Furnace

Iron Ore Processing for the Blast Furnace ... which are powered by electric motors ranging from 2,500 hp to 4,000 hp and are charged with 1-1/2" chrome grinding balls. Fine grinding is achieved using these smaller mills, ... Limestone is added to meet the requirements of steel customers in the blast furnace .

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The effect of using limestone in iron making process - YouTube

Nov 11, 2015· According to blast furnace schematic diagram, coke and limestone is feed at top of blast furnace, in the meanwhile, blown preheated air at blast furnace bottom.

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Metallurgical Uses – Fluxes for Metallurgy

The electric furnace is used to make steel, stainless steels, ferroalloys, and special alloys, whereas ferromanganese is often made in blast furnaces. Fluxes are used in all of these processes, and either limestone or lime is the major flux component with some dolomite, dolomitic lime, silica, alumina, and fluorspar being used.

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Blast furnace - SlideShare

Mar 31, 2014· Three substances are needed to enable to extraction of iron from its ore. The combined mixture is called the charge: Iron ore, haematite - often contains sand with iron oxide, Fe2O3. Limestone (calcium carbonate). Coke - mainly carbon The charge is placed a giant chimney called a blast furnace. The blast furnace is around 30 metres high and lined with fireproof bricks.

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why limestone used in pelletising of iron

Why is limestone added to the blast furnace during ... The raw materials used to produce pig iron in a blast furnace are iron ore, coke, sinter, and limestone. » More; Why is limestone used >Limestone is used in buildings and roads. >Limestone can be used in glass making. >Limestone is used in toothpaste. >Limestone is used in cement and mortar. » More; why limestone is used in paper mill

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Blast Furnace operation: The Blast Furnace Plant

Aug 02, 2011· At the top of the furnace the materials are held until a "charge" usually consisting of some type of metallic (ore, pellets or sinter), coke and flux (limestone) have accumulated. The precise filling order is developed by the blast furnace operators to carefully control gas flow and chemical reactions inside the furnace.

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blast furnace limestone

blast furnace limestone. Home › blast furnace limestone. Extraction of Iron. This is done in a blast furnace. The haematite is fed into the top of the furnace along with coke (a cheap form of carbon, made from coal) and lizenithne. ... The charge for a blast furnace consists of coke, iron ore, lizenithne, air and water which is used as a ...

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where does the carbon that is used in a blast furnace come ...

Why sinter is used in blast furnace Where does the carbon that is used in blast furnace come from? . Coal, distilled to drive off its contents and leave the carbon, plus a little bit of Iron ore or Haematite (Fe3O2), Carbon in the form of ''Coke'', and Limestone (Calcium Carbonate ''CaCO3'') are all used in the blast furnace.

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Why is hot air blown into the bottom of the blast furnace ...

Jun 15, 2012· The blast furnace is used to extract iron from its ore. The iron ore, coke and limestone are fed into the top and the hot air is blown into the bottom. The hot air rises through the furnace and causes several chemical reactions to happen. The oxygen in the air reacts with the coke to produce carbon dioxide and the limestone breaks down also ...

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Solved: APT A. PROCESS MASS And NKUI JALAN TU Con Er An Ir ...

APT A. PROCESS MASS and NKUI JALAN TU Con er an iron blast furnace charged with iron ore, limestone (CaCO,) and coke. The weight analyses of the charge is as follows: MnO ALOT Н,0 C CaCO3 SiO2 Fe:0; 80% 1% 3% Ore 12% 4% 10% 1% 95% Limestone Coke 90% The ultimate weight analysis of the pig iron gives 93.8% Fe, 4% C, 1.2% Si and 1% Mn.

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"STUDIES ON INFLUENCE OF LIQUID LEVEL ON BLAST .

The blast furnace is charged with iron ore, coke and limestone from the top and preheated air with enriched oxygen is blown through the tuyeres. The dumped raw materials require 6 to 7 hours to descend through the furnace to the bottom

Use of Iron Ore Pellets in Blast Furnace Burden – IspatGuru

Jun 13, 2014· Use of Iron Ore Pellets in Blast Furnace Burden Pelletizing is a process that involves mixing very finely ground particles of iron ore fines of size less than 200 mesh with additives like bentonite and then shaping them into oval/spherical lumps of 8-20 mm in diameter by a pelletizer and hardening the balls by firing with a fuel.

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The Blast Furnace

The combined mixture is called the charge: Iron ore, haematite - often contains sand with iron oxide, Fe2O3. Limestone (calcium carbonate). Coke - mainly carbon The charge is placed a giant chimney called a blast furnace. The blast furnace is around 30 metres high and lined with fireproof bricks. Hot air is blasted through the bottom.

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