what is iron ore slag used for

What is an Iron Slag Abrasive Definition from

What is an Iron Slag Abrasive Definition from

Jan 14 2018 An iron slag abrasive is a type of abrasive grit material that is collected from iron ore after it is smelted and refined in a furnace Iron slag is considered a general purpose abrasive Iron slag abrasive is also known as calcium silicate which is the name of the chemical compound that it is made from Advertisement Iron and steel slags are coproducts of iron and steel manufacturing In the production of iron the blast furnace is charged with iron ore fluxing agents usually limestone and dolomite and coke as fuel and the reducing agent The iron ore is a mixture of iron oxides silica and alumina From this and the added fluxing agents molten slag and iron are formed

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Why is iron ore reduced in a blast furnace Quora

Why is iron ore reduced in a blast furnace Quora

Mar 13 2010 The ore is loaded into a blast furnace along with measured quantities of coke and limestone Hot combustion air is supplied to the furnace and some form of fuel used to raise the temperature The iron is reduced from the ore by carbon in the coke the limestone aiding slag separation from the molten iron The slag and molten iron are tapped off from the bottom of the furnace the slag Iron slag is the coproduct from the reduction of iron ores to produce molten iron and molten slag Iron slag is used in many fields where its unique characteristics can be put to effective useIt ia stony waste matter separated from metals during the smelting ore

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Types of iron and steel slag NIPPON SLAG ASSOCIATION

Types of iron and steel slag NIPPON SLAG ASSOCIATION

Pig iron production is generally only one step in the creation of a finished iron product since the high carbon content of iron in this form makes it mostly unusable To make it more versatile it can be melted again and mixed with slag creating wrought iron or combined with additional iron ore and alloys to create cast iron The terms blast furnace slag BFS and granulated blast furnace slag as well as LD slag and electric furnace slag are used for finer distinctions With highquality iron ore grades with an iron content of 64 to 67 a blast furnace typically produces about 025 to 030 t of slag per t of pig iron

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What Is Involved in Pig Iron Production with pictures

What Is Involved in Pig Iron Production with pictures

Slag can be found on the beaches west of Munising MI as well as at several other places in Michigan in other areas where blast furnaces were used to purify ore Iron ore was first discovered in the UP in the 1840s Although the iron ore rock was up to 72 percent pure it was necessary to remove the impurities and extract the iron Iron INDUSTRIAL USES OF SLAGTHE USE AND REUSE OF IRON AND STEELMAKING SLAGS 57 Introduction Throughout the ages slags have been used to refine metals for the benefit of humankind For example Agricola1 describes the direct reduction of iron from ore iron is melted out and when this is done the master opens the

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Iron and Steel Slag Statistics and Information

Iron and Steel Slag Statistics and Information

Fe balance 0995Fein iron ore Fe in pig iron Let x kg iron ore 0995 H 5 5 6 5 4 H078 H L927 L a Weight of slag Slag consists of FeOSiO 6Al 6 O 7MgOP 6 O 9CaO Si in slag L Si in ore ESi in coke ESi in limestone LSi in pig iron 8865kg L3166 kg moes Iron when extracted from iron ore such as haematite containing iron III oxide Fe2O3 in a blast furnace is called iron extraction blast furnace metallurgy In this reduction reaction oxygen is removed from the iron III oxide to leave behind iron Generally the extraction of metals and their isolation are based on three major procedures

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How Iron Was Made Saugus Iron Works National Historic

How Iron Was Made Saugus Iron Works National Historic

The more dense pig iron lies at the bopttom of the furnace and the lighter slag forms and immiscible layer above it the molten iron and slag are tapped off every few hours C12 What is slag used for Dec 27 2015 Ferrous slag forms as a dominantly calcium silicate melt that floats on top of the molten crude iron or steel the slag is then removed from the liquid metal For typical iron ore grades 60 to 66 percent iron blast furnace slag output will be about 025 to 030 metric tons of slag per ton of crude iron

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How iron is made material manufacture making history

How iron is made material manufacture making history

Blast furnace slag Blast furnace slag is recovered by melting separation from blast furnaces that produce molten pig iron It consists of nonferrous components contained in the iron ore together with limestone as an auxiliary materials and ash from coke Approximately 290 kg of slag is generated for each ton of pig iron then reacts with the iron ore to form carbon dioxide and pure iron Separating the iron from the slag 2 The melted iron sinks to the bottom of the furnace The limestone combines with the rock and other impurities in the ore to form a slag which is lighter than the iron and floats on top

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Iron Ore Smelting Process Bright Hub Engineering

Iron Ore Smelting Process Bright Hub Engineering

Bog ore is an ironrich sedimentary rock that was harvested locally from bogs and similar bodies of water It was also found in fields and meadows that used to be bogs Bog ore is often considerably less than 50 iron The rest of the rock was made up of impurities that the workers had to remove Gabbro was used as a fluxa way to purify the ore Which type of Iron ore is mixed with the binder in a balling drum to form pellets Taconite 2 What three materials are melted in a blast furnace Coke limestone and iron ore Combines with carbon and other impurities to form slag 10 Electric arc furnaces are normally used to produce what types of steel Hi quality steel 11 Pouring molten steel

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How to Smelt Iron The 6 Steps to Iron Smelting The

How to Smelt Iron The 6 Steps to Iron Smelting The

The use of slag in road construction can be traced back to the very early days when the Romans used iron slag as a pavement material in parts of the famous Appian Way Iron slag was first produced commercially in Australia at Mittagong NSW in 1848 and the slag known locally as Mittagong Stonewas used for road construction Iron Bloomery Slag This is an example of bloomery slag typical of iron furnaces from preRoman times until the Middle Ages The slag has trickled down either the inside or outside the furnace The direction of the drips indicates the downward direction Click the thumbnail to see a larger photo Minepits Ore minepits were often dug in

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What are the advantages and disadvantages of high silica

What are the advantages and disadvantages of high silica

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 What happens in the Blast Furnace The purpose of a Blast Furnace is to reduce the concentrated ore chemically to its liquid metal state High silica low alumina iron ores have no specific disadvantage in blast furnace iron making unless silica is so high that it results in large slag volume Low Al2O3 in ore facilitates and helps

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Mineral Resource of the Month Iron and Steel Slag

Mineral Resource of the Month Iron and Steel Slag

A synthetic aggregate may also be the byproduct of manufacturing and a final burning processblast furnace slag is an example of a synthetic aggregate Briefly blast furnace slag is formed when iron ore or iron pellets coke and a flux such as limestone CaCO 3 or dolomite CaCO 3 MgCO 3 are melted together in a blast furnace When the When iron ore is reduced in a blast furnace some of the S i O 2 impurity is also reduced by reaction with carbon to give elemental silicon and carbon monoxide The silicon is subsequently reoxidised in basic oxygen process and the resulting S i O 2 reacts with C a O yielding slag

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a guide to the use of iron and steel slag in roads

a guide to the use of iron and steel slag in roads

Dec 27 2015 Credit Library of Congress Iron and steel slag also known as ferrous slag is produced by adding limestone or dolomite lime and silica sand to blast furnaces and steel furnaces to strip impurities from iron ore scrap and other ferrous feed materials and to lower the heat requirements of the iron and steelmaking processes Jan 31 2008 Apr 2 2005 1066 367 Little Egg Harbor Jan 29 2008 3 Slag also often has a more glasslike appearance Since slag is just the impurities that are present in the bog iron ore prior to separation in the furnace it can vary widely depending on the mineral makeup of the particular ore

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The slag formed in the extraction of iron from haematite

The slag formed in the extraction of iron from haematite

1 Iron ore coke and limestone are carried up to the top of the furnace often with skip cars 2 The blast furnace may be more than 250 feet tall The inside is about 30 feet wide The outside of the furnace is a steel shell and inside of the furnace is lines with a refractory material usually fireresistant brick Dec 03 2020 The furnace also called a bloomery is used to heat up the iron ore along with a chemical reducing agent charcoal A traditional bloomery doesnt generate enough heat to fully melt the ore Instead the ore melts to a spongy mass that will need

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Industrial uses of slagThe use and reuse of iron and

Industrial uses of slagThe use and reuse of iron and

Iron ore most commonly hematite and magnetite goes through a process known as sintering to create pieces that are 1025mm in size These pieces enter the furnace along with coal known as coke in this context which provides the heat and limestone which makes any impurities in the ore rise to the top to form a layer called slag Blast Furnace International Iron Metallics Association IIMA Some blast furnaces use a double bell system where two bells are used to control the entry of raw material into the blast furnaceThe 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

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Slag vs Pig Iron NJPB Forums

Slag vs Pig Iron NJPB Forums

Oct 18 2017 Blast furnace slag is a calciumsilicatebased product removed from the top of molten iron during its extraction from ore in a blast furnace Usually it is rapidly cooled to a glassy state and ground for use in construction materials Provis et al 2015 Global steel production is based on the refining of liquid pig iron in basic oxygen converters No technologies that do not use liquid pig iron are expected to replace this method in the coming decades and ore and coal will remain the main raw ma

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