blast furnace slag for pelletisation of iron ore

  • Iron and Steel Slag Statistics and Information

    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.

  • Blast Furnace Slag National Slag Association

    Blast Furnace Slag is formed when iron ore or iron pellets, coke and a flux (either limestone or dolomite) are melted together in a blast furnace.When the metallurgical smelting process is complete, the lime in the flux has been chemically combined with the aluminates and silicates of the ore and coke ash to form a non-metallic product called blast furnace slag.

  • Introduction to Iron ore Pellets and Pelletizing processes

    It is an agglomerating process of converting iron ore fines into ‘uniformed sized iron ore pellets’ which can be charged directly into a blast furnace (BF) or into a vertical furnace or rotary kiln normally used for the production of direct reduced iron (DRI). The iron ore pellets are shown in Fig 1.

  • Slag Wikipedia

    Slag is the glass-like by-product left over after a desired metal has been separated (i.e., smelted) from its raw ore.Slag is usually a mixture of metal oxides and silicon dioxide.However, slags can contain metal sulfides and elemental metals. While slags are generally used to remove waste in metal smelting, they can also serve other purposes, such as assisting in the temperature control of

  • Blast furnace Wikipedia

    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. Blast refers to the combustion air being "forced" or supplied above atmospheric pressure.. 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

  • The Extraction of Iron Chemistry LibreTexts

    Extracting iron from iron ore using a Blast Furnace. The common ores of iron are both iron oxides, and these can be reduced to iron by heating them with carbon in the form of coke. Coke is produced by heating coal in the absence of air. Coke is cheap and provides both the reducing agent for the reaction and also the heat source.

  • Iron ore pelletizing systems Metso

    Iron ore fines are agglomerated into pellets and then indurated using a furnace to create iron ore pellets. These are typically fed to a blast furnace or DRI plant as part of the process to make steel. Metso is the only supplier in the world that has both the Straight Grate and

  • Extraction of Iron Metallurgy Blast Furnace and Reactions

    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 hopper which controls the input.

  • Iron Ore Pellets and Pelletization Process IspatGuru

    Iron Ore Pellets and Pelletization Process. Pelletizing of iron ore was started in the 1950s to facilitate the utilization of finely ground iron ore concentrates in steel production. For the pelletizing of iron ore there are two main types of processes namely, the straight travelling grate (STG) process and the grate kiln (GK) process.

  • Blast Furnace an overview ScienceDirect Topics

    Blast-furnace slag (BFS) is “developed” in a molten condition simultaneously with iron in a blast furnace (Lewis, 1982). Such slag consists primarily of impurities of iron ore (mainly silica and alumina). The composition of slag depends on the composition of iron ore, fuel, flux stones, and mixing ratios required for efficient furnace

  • 22. Iron and The Old Stone Furnaces of Western Pennsylvania

    Apr 20, 2014· The honor of having been the first American blast furnace to use Lake Superior iron ore occurred in 1853 when, owners, David and John P. Agnew used the ore in the Sharpsville Furnace, Mercer County, Pennsylvania. Lake Superior iron ore was far superior than local ores, much higher metal percentage.

  • Blast Furnace Slag an overview ScienceDirect Topics

    Blast furnace slag (BFS) which is defined “as the non-metallic product consisting essentially of silicates and alumina silicates of calcium and other bases, that is developed in a molten condition simultaneously with iron in a blast furnace” by ASTM C 125-16 (2016) has been widely used in construction industry for more than 80 years. When

  • Blast furnace metallurgy Britannica

    In Europe, the blast furnace developed gradually over the centuries from small furnaces operated by the Romans, in which charcoal was used for reducing ore to a semisolid mass of iron containing a relatively small amount of carbon and slag. The iron mass was then hammered to remove the slag, yielding wrought iron. Increases in the height of the

  • Bogolong iron mine and blast furnace Wikipedia

    The Bogolong iron mine and blast furnace is an abandoned iron mining and smelting site, near Bookham, New South Wales, Australia.Located in an area known best for sheep grazing and wool, it has been called Australia's 'forgotten furnace'. In 1874, the blast furnace produced a small amount of pig iron—sufficient to allow its testing—that was smelted from iron ore mined nearby.

  • (PDF) IRON AND STEELMAKING SLAGS: ARE THEY HAZARDOUS

    SYNOPSIS: Blast furnace slag has been applied for cement making in the early of 1900s. Currently, almost all blast furnace slag is utilized for various purposes, such as cement making, road

  • Iron and Steel Production Eippcb

    • sintering and pelletisation of iron ore • the production of molten iron by the blast furnace route, including slag processing • the production and refining of steel using the basic oxygen process, including upstream ladle desulphurisation, downstream ladle metallurgy and slag processing

  • Mineral Resource of the Month: Iron and Steel Slag EARTH

    For typical iron ore grades (60 to 66 percent iron), blast furnace slag output will be about 0.25 to 0.30 metric tons of slag per ton of crude iron produced. Steel furnace slag production, after removal of entrained metal, will be about 10 to 15 percent of the crude steel output.

  • Creating Iron HowStuffWorks

    A blast furnace is charged with iron ore, charcoal or coke (coke is charcoal made from coal) and limestone (CaCO 3 ­). Huge quantities of air blast in at the bottom of the furnace, and the calcium in the limestone combines with the silicates to form slag. Liquid iron collects at the bottom of the blast furnace, underneath a layer of slag. The

  • Types of iron and steel slag : NIPPON SLAG ASSOCIATION

    Blast furnace slag is recovered by melting separation from blast furnaces that produce molten pig iron. It consists of non-ferrous 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. When it is ejected from a blast furnace

  • Iron ore: Mineralogy, processing and environmental

    Sintering is an important step in the iron-producing process, where loose iron ore fines (< 6 mm) are transformed at temperatures between 1250 and 1350 C into a mechanically stable composite that

  • Iron Ore Smelting Process Bright Hub Engineering

    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 being

  • High Alumina Slag and Blast Furnace Operation IspatGuru

    May 27, 2013· High Alumina Slag and Blast Furnace Operation. satyendra; May 27, 2013; 2 Comments ; alumina, Basicity, magnesia, slag, viscosity,; High Alumina Slag and Blast Furnace Operation. Blast furnace (BF) process of iron making is a process where liquid iron (hot metal) and liquid slag are produced by the reduction of iron bearing materials (sinter and/or pellet and lump ore) with coke and

  • Effect of Basicity on the Reduction Behavior of Iron Ore

    Mar 22, 2018· Physicochemical properties of the iron ore pellets depend on the iron oxide concentrate, gangue content and the amount of fluxes added. The objective of this present work is to study the reducibility as well as the softening–melting behavior of the iron ore bearing fines (mainly containing hematite) pellet with lime to silica ratio (C/S) varying from 0.9 to 2.4 in the temperature range of

  • Photographs, Blast Furnace, USS Gary Works

    One of the 12 big blast furnaces at U.S. Steel's Gary Steel Works. The blast furnaces take iron ore, coke and limestone in through the top, and heated air is then blown through the bottom to produce pig iron. This is an over-all view of a blast furnace at Gary Steel.

  • MAXIMIZING LOW FE HYGROSCOPIC IRON ORE

    The purpose of a blast furnace is to chemically reduce and physically convert iron oxides into liquid iron called "hot metal". 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

  • Induration Furnace or Indurating Kiln for Iron Ore

    Jan 15, 2020· An Induarting Kiln (or Indurating Furnace or Induration Furnace) is circular shaped furnace resembling a Rotary Kiln and form a key part of one of the process routes for preparing iron ore fines for use in blast furnaces, and are specifically used for Iron Ore Pelletisation or Fly Ash Pelletisation.

  • Blast furnace Simple English Wikipedia, the free

    A blast furnace is a special type of furnace for smelting iron from ore.Blast furnaces are very large. They can be up to 60 metres (200 ft) tall and 15 metres (49 ft) in diameter.The blast furnace is the biggest chemical reactor.Blast furnaces are also called high ovens.. A blast furnace is usually built with a steel case and bricks made of magnesium oxide or other refractory material inside

  • Iron Ore Smelting Process Bright Hub Engineering

    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 being

  • Iron-process recycling of iron slag YouTube

    Sep 30, 2012· Iron-process recycling of iron slag Jacqueline Sabrina. Blast furnace extraction of iron recycling, There is an ore storage yard that can also be an ore

  • Generation of iron and steel slag : NIPPON SLAG ASSOCIATION

    Blast furnace slag is a combination of silica and other non-ferrous components of iron ore, ash from coke used as a reducing material, and limestone auxiliary material. Because its specific gravity is less than that of pig iron, during the heating process the molten slag rises above the pig iron allowing it to be easily separated and recovered.

  • What are the advantages and disadvantages of high silica

    Tolerance to silica and alumina in iron ore depends on the process and ore size. Lump +6mm particles can be fed directly into the blast furnace while fines (generally -6mm) need to be agglomerated

  • The Extraction of Iron Chemistry LibreTexts

    Extracting iron from iron ore using a Blast Furnace. The common ores of iron are both iron oxides, and these can be reduced to iron by heating them with carbon in the form of coke. Coke is produced by heating coal in the absence of air. Coke is cheap and provides both the reducing agent for the reaction and also the heat source.

  • IRON SLAGS ON ARCHAEOLOGICAL SITES: AN

    bottoms), run slag, tap slag, dense slag or blast furnace slag. Primary smithing took place in periods before the post‐medieval development of casting iron. It involved the hot working (by a smith using a hammer) of the raw iron on a hearth (usually near the smelting furnace) to remove excess slag. The slags from this process include smithing

  • GROUND GRANULATED BLAST FURNACE SLAG SAFETY

    Blast furnace slag is a by-product of iron manufacturing, via thermochemical reduction, in a blast furnace. Blast furnace slag is formed in a continuous process by melting lime (and/or dolomite), the waste from carbon sources and non-metallic components of iron load (e.g. iron ore, iron sintering).

  • Photographs, Blast Furnace, USS Gary Works

    One of the 12 big blast furnaces at U.S. Steel's Gary Steel Works. The blast furnaces take iron ore, coke and limestone in through the top, and heated air is then blown through the bottom to produce pig iron. This is an over-all view of a blast furnace at Gary Steel.

  • How is slag removed from molten iron? Quora

    Jul 21, 2019· Slag is less dense than iron so it floats on the surface. In a blast furnace the hot metal comes out of the tap hole in the side of the furnace and goes down a trough or runner. A refractory coated skimming blade skims the surface of the hot metal...

  • Iron Ore Pelletizing Process: An Overview IntechOpen

    The iron ore production has significantly expanded in recent years, owing to increasing steel demands in developing countries. However, the content of iron in ore deposits has deteriorated and low-grade iron ore has been processed. The fines resulting from the concentration process must be agglomerated for use in iron and steelmaking. This chapter shows the status of the pelletizing process

  • IRON AND STEEL chemguide

    Iron ore isn't pure iron oxide it also contains an assortment of rocky material. This wouldn't melt at the temperature of the furnace, and would eventually clog it up. The limestone is added to convert this into slag which melts and runs to the bottom.