• HYL Process for Direct Reduction of Iron Ore – IspatGuru

    Apr 22, 2017 · HYL process for direct reduction of iron ore was the fruition of research efforts begun by Hojalata y L.mina, S.A. (later known as Hylsa), at the beginning of the 1950s. After the initial evaluation of the concept, it was decided to install a process using a tunnel furnace and several runs were undertaken.

  • CN103667678A Roasting technology of vanadium titano

    The present invention provides a roasting technology of a vanadium titanomagnetite oxidized pellet for a shaft furnace, and the roasting technology is as follows: fine grinding vanadium titanomagnetite into ore grains with the granularity of smaller than 200 meshes being more than 70%, and then drying adding a 10 to 15 wt % organic binder for even mixing to pelletize performing oxidizing

  • (PDF) Coating of iron oxide pellets for direct reduction

    A series of reduction experiments of iron ore pellets with hydrogen, carbon monoxide and their mixture were carried out in a laboratory scale shaft furnace. The sticking behavior accompanying

  • Influence of Iron Ore Mineralogy on Cluster Formation

    It was found that reducibility increases by decreasing the iron ore pellet''s size. Ore (A) has the highest reducibility than ore (B) and ore (C). Increasing the iron ore pellet''s size leads to increase the probability of metallic iron whisker formation. Ore (A) has the highest tendency for metallic iron whisker formation than ore (B) and

  • Research Article ISSN : 09757384 Prediction method for

    The falling speed of iron ore pellets is 0.00022 m/s in DRI shaft furnace and the reduction gas quantity is 1445 Nm 3 /t with its temperature 1173 K. Fig. 2 shows the temperature change curves of reduction section at different times. It can be found that because of the gassolid heat transfer, half of the iron ore pellets are heated to 500 K

  • The Making of Iron & Steel

    Iron ore, as mined, is a combination of iron with oxygen and various other unwanted substances, generally known as "gangue". The first metallurgical step is to reduce iron ore to metallic iron, a process which is mostly carried out in a blast furnace, using coke as both a fuel and reducing agent.

  • Ironmaking Alternatives Screening

    Iron Carbide, the Rotary Hearth Processes, Tecnored, etc.), non as yet challenge the Shaft Furnace Processes. One of the constraints on these Shaft Furnace processes is that they require either highgrade lump ore or pellets as their iron unit raw material feed. Costs for such feeds are going up and there are limitations in supply.

  • iron ore pellets versus sinter in blast furnace

    iron ore pellet vs sinter cingoliavventurait. Sintering is a process used to agglomerate iron ore fines in preparation for blastfurnace smelting and is usually, pellet or sinter form) in blast furnac Get Price/Info iron ore pellets vs sinter iffdcorgin Improved ironore sinter for blast furnaces . Chat Now

  • Cost Effectiveness Analysis of HYL and Midrex DRI

    Midrex is a process by which iron ore pellets, lump iron ore or a combination of both is reduced in a vertical shaft/reduction furnace. The reduced material then flows through alyst tubes where it is chemically converted into a gas containing hydrogen and carbon monoxide. As the iron ore moves down the furnace

  • Reducibility and reduction swelling behaviour of some iron

    Iron ore pellets are used for the production of hot metal in blast furnaces and DRI/HBI in direct reduction processes. A blast furnace is a shaft furnace, which is charged with iron bearing materials (pellets, sinters and/or lump ore), reducing agents (metallurgical coke)

  • Iron Ore Pellet an overview ScienceDirect Topics

    Available sources of iron oxide include highgrade lump ore, beneficiated iron ore fines, iron ore pellets, and agglomerates from dusts produced by the BF, basic oxygen furnace, and the EAF. Most DRI is produced in shaft furnaces, which require a uniformsized coarse feed.

  • 800 N. Shoreline Blvd., Ste. 1600S 2800 La Quinta Terminal

    enclosed stock piles. From the stockpiles the ore will be reacted in a tower reactor (shaft furnace) with a reducing gas manufactured on site by steam reformation of natural gas. The product of the DRI process is not liquid metal iron, but rather ''sponge iron'', which is approximately 92% by weight iron.

  • Optimization of iron ore blending in the COREX shaft furnace

    Sishen lump ore and CVRD pellets were used initially in the COREX shaft furnaces in China. Alternative lump ores L1, L2, and L3 were imported from Brazil, Australia, and South Africa respectively. The dominant phase in the iron ores was haematite. The chemical compositions of the iron ore

  • Iron Ore Pelletizing Process: An Overview IntechOpen

    Iron ore and iron ore pellets are important sources of iron for manufacturing steel. The iron ore production has significantly expanded in recent years, owing to increasing steel demands in developing countries, such as China and India. However, the content of iron ore in deposits has deteriorated and lowgrade iron ore has been processed.

  • Pelletizing Shaft Kiln Pelletizing Shaft Kiln Manufacturer

    Overview The production of pellet is like the sinter production, it supply beneficiated burden for blast furnace, the production process will produce the pellets from iron ore concentrate or powder materials.The prepared raw materials are made into certain size pellets after batching and blending in certain pro portion, then adopt drying and roasting method to produce a series of physical

  • Detailed Modeling of the Direct Reduction of Iron Ore in a

    carbon dioxide emissions. As such, numerous iron ore shaft furnace models have been proposed in the literature. Initial studies addressed the reduction of a single pellet by H2, CO, or H2CO mixtures [4–9]. Subsequent studies developed models that simulated the reduction zone of the shaft furnace in one dimension [10,11].

  • Direct reduced iron Wikipedia

    Hot direct reduced iron (HDRI) is DRI that is transported hot, directly from the reduction furnace, into an electric arc furnace, thereby saving energy. The direct reduction process uses pelletized iron ore or natural "lump" ore. One exception is the fluidized bed process which requires sized iron ore particles.

  • Midrex Process for Direct Reduction of Iron Ore – IspatGuru

    Apr 09, 2017 · Midrex Process for Direct Reduction of Iron Ore. Midrex is an ironmaking process, developed for the production of direct reduced iron (DRI). It is a gasbased shaft furnace process is a solid state reduction process which reduces iron ore pellets or lump ore into DRI without their melting using reducing gas generally formed from natural gas.

  • A ShaftElectric Furnace for Melting and Smelting

    When prereduced iron pellets are melted in this unit, the operating conditions in the shaft furnace must be considerably different than when an oxide ore is being smelted. Because the pellets are almost completely reduced, only a minor amount of reduction remains to be completed in the arc furnace and, therefore, only a very small quantity of

  • Iron ore pelletizing systems

    Iron ore pelletizing systems. 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.

  • –– Iron Ore Pelletization Iron Ore

    Iron Ore Feed Material: Blend of Orissa Blue Dust Hematite Product Specifiions: Iron Ore Pellets for Blast Furnace and DRI Feed Straight Grate System Reference Plant JSPL Barbil Line

  • Process through Multiscale Process Modeling

    3. Shaft Furnace Model 3.1. Previous Works The shaft furnace (Figure 2) is the core of the DR process. Iron ore pellets are charged at the top, descend due to gravity, and encounter an upward counterflow of gas. The reducing gas (CO and H 2, plus CH 4, CO 2, and H 2O, at about 950 °C) is injected peripherally at midheight and exits at the top.

  • Blast furnace metallurgy Britannica

    Blast furnace, a vertical shaft furnace that produces liquid metals by the reaction of a flow of air introduced under pressure into the bottom of the furnace with a mixture of metallic ore, coke, and flux fed into the top. Blast furnaces are used to produce pig iron from iron ore for subsequent

  • Potential for CO2 emissions reduction in MIDREX direct

    Reduced Iron Cooling Gas Scrubber Cooling Gas Compressor Iron Oxide Natural Gas is used as a reductant. Coke is not required. (Pellets/Lump Ore are reduced to produce DRI without being melt in the shaft furnace.) DRI is fed to EAF to produce steel. As the iron oxide descends through the furnace, the iron oxide is heated and reduced

  • Laboratory Simulation of the Shaft Furnace Reduction of

    The apparatus allows continously changing reduction conditions to be impressed on lump or pellet samples to simulate the environment that is experienced by iron ore burdens during their transit down the shaft of a direct reduction furnace. Three pellet samples and three lump ore samples were reduced in the apparatus.

  • Refractory Bricks for Pellet Shaft Furnace

    Pellet shaft furnace is a common high temperature kiln in metallurgical industry. It is used to roast various materials, such as iron ore, iron concentrate pellets, nonferrous metal ore

  • Iron Ore Pellets: North America, BF and DR Grade, Supply

    shaft furnaces: pellets, lump ore key physical properties are size consist, mechanical strength: economic importance (a) yield of pellet, lump ore converted to DRI (b) performance of the shaft reduction furnace unlike blast furnace, pellets (and lump ore) are only solid materials and so determine

  • 11.23 Taconite Ore Processing US EPA

    Iron ore concentrates must be coarser than about No. 10 mesh to be acceptable as blast furnace feed without further treatment. Finer concentrates are agglomerated into small "green" pellets, which are classified as either acid pellets or flux pellets. Acid pellets are produced from iron ore and a binder only, and flux pellets are produced by

  • DRI production International Iron Metallics Association

    Direct reduction of iron is the removal of oxygen from iron ore or other iron bearing materials in the solid state, i.e. without melting, as in the blast furnace. The reducing agents are carbon monoxide and hydrogen, coming from reformed natural gas, syngas or coal. Iron ore is used mostly in pellet

  • "DR Grade Pellet Quality, Supply and Prices"

    shaft furnaces: pellets, lump ore. key physical properties are size consist, mechanical strength: economic importance (a) yield of pellet, lump ore converted to DRI (b) performance of the shaft reduction furnace. unlike blast furnace, pellets (and lump ore) are only iron ore price dependent upon sintering ore

  • Prediction of Iron Ore Pellet Strength Using Artificial

    Cold Compression Strength (CCS) is an important property of iron ore pellets that are used for the production of DRI from shaft furnace or for use in blast furnace. CCS is one of the control parameters during the pellet production and it is supposed to be closely monitored to

  • Pelletizing Wikipedia

    The formation of raw iron ore pellets, also known as pelletizing, has the objective of producing pellets in an appropriate band of sizes and with mechanical properties high usefulness during the stresses of transference, transport, and use. Both mechanical force and thermal processes are used to produce the correct pellet properties.

  • Pellets for Direct Reduction

    LKAB have concentrated on developing and marketing grades of pellets for the MidrexPuroferHyl process group, i.e. such D.R. processes which are carried out in a shaft furnace or a static bed using reformed natural gas as a reducing agent. The paper deals with properties and quality demands of iron ore pellets for such processes.

  • Moving behavior of pellets in a pellet shaft furnace

    Abstract. The downward moving behavior of pellets in a 8 m 2 pellet shaft furnace with an internal vertical air channel and a drying bed was studied by means of a visualized model (1:15) and a top model (1:1). The visualized model experiment shows that the downward movement of pellets can be regarded as plug flow approximately inside the furnace except for the lower region of cooling zone due

  • MODELING THE IRON ORE PELLETS REDUCTION ON SHAFT FURNACE

    The process for pelletizing iron ore fines is an important operation unit for producing high quality of raw materials for the subsequent reduction processes such as blast furnace or direct reduction.

  • Understanding Pellets and Pellet Plant Operations – IspatGuru

    Mar 21, 2015 · Understanding Pellets and Pellet Plant Operations. Pelletizing is an agglomeration process which converts very fine grained iron ore into balls of a certain diameter range (normally 8mm to 20 mm, also known as pellets. These pellets are suitable for blast furnace

  • Iron ore pelletizing GrateKilnTM system

    Iron ore pelletizing 3 Process flexibility There are two main processes for producing iron ore pellets: The GrateKiln system and the straight grate system. In the straight grate system, a continuous parade of grate cars moves at the same speed though the drying, induration and cooling zones. Any change in one section effects the residence

  • Detailed Modeling of the Direct Reduction of Iron Ore in a

    As such, numerous iron ore shaft furnace models have been proposed in the literature. Initial studies addressed the reduction of a single pellet by H 2, CO, or H 2CO mixtures [4,5,6,7,8,9]. Subsequent studies developed models that simulated the reduction zone of the shaft furnace in

  • © IEA ETSAP Technology Brief I02 May 2010 A mixture of pellets or lump ore, possibly including up to 10% of fine ore, enters the furnace shaft. As ore descends, oxygen is removed by counterflowing reduction gas, which is enriched in hydrogen and carbon monoxide. Further information on different DRI processes can be found in [3] and [6]. In

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