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  • ironmaking in rotary hearth furnace ispatguru

    May 17, 2017 · Ironmaking in the rotary hearth furnace (RHF) is a direct reduction process which utilizes non-coking coal for the reduction of iron ore. The RHF is the process reactor which consists of a flat, refractory hearth rotating inside a stationary, circular tunnel kiln. Inside the RHF, direct reduction of iron ore or iron-bearing waste materials occurs, using coal as the reductant

  • development prospect of rotary hearth furnace process in

    Summarized the development situation of rotary hearth furnace (RHF) direct reduction technology, ore resource allocation situation and direct reduction iron demand

  • carbon-composite briquetting of iron ore fines & fast

    Iron-carbon composite is produced by mixing iron ore fines & anthracite coal fines, and densified by briquetting. These briquettes are dried & finally reduced in the rotary hearth furnace in 30-40 minutes. As the carbon particles directly touch the oxygen particles & high temperatures of 1,250-1,350°C are maintained in the process, the reduction is much faster

  • carbon-composite briquetting of iron orefines & fast

    Iron-carbon composite is produced by mixing iron ore fines & anthracite coal fines, and densified by briquetting. These briquettes are dried & finally reduced in the rotary hearth furnace in 30-40 minutes. As the carbon particles directly touch the oxygen particles & high temperatures of 1,250-1,350°C are maintained in the process, the reduction is much faster

  • rotary hearth furnace (rhf) | nippon steel engineering

    A rotary hearth furnace is a direct-reduction device that enables to recover valuable metals from dust produced during the steelmaking process, as well as to produce direct-reduced iron from fine ore. Steel mills generate various kinds of dust that are produced during the steelmaking process. Among these, dust containing large quantities of zinc cannot be directly recycled in the steelmaking process

  • us5885521a - apparatus for rapid reductionofironoxide

    A method and apparatus for producing direct reduced iron from dry compacts composed of iron oxide and carbonaceous material by feeding compacts no more than two layers deep onto a hearth and

  • production of direct reduced iron in rotary hearth furnace

    Sep 23, 2011 · Rotary Hearth Furnace(RHF)
    A donut-shaped refractory-lined vessel.
    Contains rotating bottom or rotating hearth.
    Uses ore and carbonaceous reductant in the form of a single or a multilayer bed.
    The temperature is controlled by means of burners positioned along the walls and on the roof of the furnace.
    6. Rotary Hearth Furnace contd.
    Rotary Hearth Furnace for Iron …

  • sponge iron- welcome to igr india

    Technology and equipment for production sponge iron from hematite are fines through Rotary Hearth Furnace has been demonstrated in a setup in China having feed capacity 100,000 Ton per annum. Mean diameter of Furnace is 13.5m. Scale – up of design is ready for 500,000 Ton per annum sponge iron capacity. Low grade Iron ore fines can be utilized, and further processing of produced hot DRI is …

  • asimulation study of reduction kinetics for sponge iron

    A mathematical model has been developed by coupling genetic algorithm (GA) with heat and material balance equations to estimate rate parameters and solid-phase evolution related to the reduction of iron ore-coal composite pellets in a multi-layer bed Rotary hearth Furnace (RHF)

  • iron nugget production process a review| steel360 news

    The reduction process is carried out in a Rotary Hearth Furnace, using coal as the reductant and energy source. The direct reduction of iron by this process is more energy efficient & more environmentally friendly than traditional iron making processes. Main Features of Iron Nuggets Production. 1

  • fastmet and fastmelt processes of ironmaking ispatguru

    Nov 15, 2013 · The process uses a rotary hearth furnace (RHF) for the reduction reaction (Fig 1). The end product DRI can be hot briquetted (HBI), discharged as hot DRI into transfer containers, or cooled if cold DRI is needed. FASTMELT process is the FASTMET process with addition of an Electric Iron Melting Furnace (EIF) to produce liquid iron or hot metal

  • direct reduction process- an overview | sciencedirect topics

    The direct reduction processes in combination with the melting of directly reduced iron to produce steel in the EAF offer an alternative to the BF-BOF route. The basis of the direct reduction process is that solid sponge iron is produced by removing oxygen from the ore in a shaft furnace, rotary kiln furnace or fluidised bed. Sponge iron can be produced in the form of Direct Reduced Iron (DRI), Hot Briquetted …

  • mechanism and influencing factors of iron nuggetsforming

    In order to improve the efficiency of slag and iron separation, a new idea of "the separation of slag (solid state) and iron (molten state) in rotary hearth furnace process at lower temperature" is put forward. In this paper, the forming process of iron nuggets has been investigated. Based on those results, the forming mechanisms and influencing factors of iron nugget at low temperature are

  • limonite rotary sintering and reduction furnace

    rotary earth furnace iron ore reduction plant. rotary earth furnace iron ore reduction ... limonite rotary sintering and reduction ... chinese rotary hearth furnace for iron ore reduction. rotary hearth furnace ... Read more. used lead rotary furnace for sale

  • solution ofiron orecrusher processing sinter plant in short

    Main feed into a sinter plant is base mix, which consists of iron ore fines, coke fines and flux (limestone) fines. In addition to base mix, coke fines, flux fines, sinter fines, iron dust (collected from plant de-dusting system & ESP) and plant waste are mixed in proportion (by weight) in a rotary drum, often called mixing and nodulizing drum

  • hematiteore rotarykiln

    Mar 07, 2020 · deposit formation in the grate-kiln process - diva21 aug 2013 . originating from iron ore pellets was only present in the grate-kiln as there was no . grate process is most often used for hematite (fe2o3) ores while the grate- . heavy fuel oil combustion in the rotary kiln flows in the opposite.full article: a case study on large-scale grate-kiln production of .21 jun 2018 . the hematite ore

  • rotary hearth furnace

    Abstract: Summarized the development situation of rotary hearth furnace (RHF) direct reduction technology, ore resource allocation situation and direct reduction iron demand. The survey results show that: China's iron ore resource allocation heavily rely on imported iron ore, gas-based direct reduction process (MIDREX, HYL-III, FINMET) is not likely to be the mainly direct reduced iron (DRI) process in …

  • reductionbehaviourof iron orecoal composite pellets in

    Reduction of iron ore–coal composite pellets in multi-layers at rotary hearth furnace (RHF) is limited by heat and mass transfer. Effect of various parameters like pellet shape, size, and bed packing material that are supposed to influence the heat and mass transfer in the pellet bed, have been investigated, on the reduction behaviour of iron ore–coal composite pellets at 1250 °C for 20 min in a laboratory scale RHF