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kiln process iron ore to dri

GoodRich offers third generation tunnel kiln process from China, to convert soft iron ore lumps or briquetted iron ore fines into Direct Reduced Iron (DRI). DRI or sponge iron is a high-quality metallic product and used as a feed-stock in the induction furnace / electric arc furnace

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  • (PDF) i) Direct Reduced Iron: Production
    (PDF) i) Direct Reduced Iron: Production

    Mar 30, 2016 This product is known as direct reduced iron (DRI) or sponge iron. ... Table 2 Characteristics of iron ore for coal-based process. ... reducing the cost of iron ore fed to the kiln. The optimum

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  • A Case Study on Accretion Formation in Rotary Kiln of DRI
    A Case Study on Accretion Formation in Rotary Kiln of DRI

    Nov 13, 2020 In coal-based DRI plants rotary kiln is used for the reduction of iron ore. Accretion rings formations inside the kiln adversely affect the performance of plant in terms of low production and inferior quality, which frequently lead to shut down. About 70% of the coal-based DRI rotatory kiln shut down is due to the accretion formation

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  • calculation on reduction for direct reduced iron in tunnel
    calculation on reduction for direct reduced iron in tunnel

    the development of a dri process for small scale eaf-based steel mills. kiln based processes are identified as possible suitors to the requirements. ... possible to reduce iron ore in a simplified pilot plant, and that the process

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  • Energy Audit Methodology of Sponge Iron
    Energy Audit Methodology of Sponge Iron

    2. Description of Sponge Iron Manufacturing Process Most of the plants in India use DRI process—a solid state direct reduction process by which iron ore is reduced to sponge without phase change (Figure 1). Raw material mix-iron ore, dolomite and coal are fed to one end of rotary Kiln and product sponge iron

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  • Direct Reduced Iron Industry in India — Problems and
    Direct Reduced Iron Industry in India — Problems and

    As indicated above, the iron ore lumps used, especially ore of Bellary — Hospet sector, hardly meet `the quality requirements for the rotary kiln sponge iron process. The sponge iron fines generation is high and ranges from 15 — 30% depending upon the ore used due to high reduction degradation. This

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  • Sponge Iron - an overview | ScienceDirect Topics
    Sponge Iron - an overview | ScienceDirect Topics

    DRI, also known as sponge iron, is the product of reducing iron oxide in the form of iron ore and steel plant wastes into metallic iron, below the melting point of iron and typically in the range of 800–1200 C. Iron oxide is charged into shaft furnace, rotary kiln, or fluidized beds in the form of pellet, iron ore lumps, or fines. The reduction takes place using gaseous reductants (CO + H

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  • CN101701275B - Method for preparing nickel iron by
    CN101701275B - Method for preparing nickel iron by

    The invention relates to a method for preparing nickel iron by using a rotary kiln for directly reducing nickel silicate ores. The method comprises the steps of breaking the raw ores, placing in a drying kiln for drying, grinding into powder, adding 1-5% of fluoride, 5-20% of calcium oxide or 10-30% of limestone, 0.1%-0.5% of copper chloride, 10-25% of iron oxide and 5-20% of coke with the

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  • SINTERING AND PELLETISATION OF INDIAN IRON ORES
    SINTERING AND PELLETISATION OF INDIAN IRON ORES

    Steep rise in the prices of raw materials for DRI & Pig Iron production Catering to the iron ore demands of all the DR/ Steel plants in the country Good productivity, product quality and reasonable campaign life is very important amongst fierce competition and low grade iron ore availability. To meet ever increasing demand for iron ore

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  • Grate kiln pelletizing plant - Metso Outotec
    Grate kiln pelletizing plant - Metso Outotec

    The process system is designed so that material transfer from the grate to the kiln occurs when the material on the grate is sufficiently preheated to have the requisite indurate strength for subsequent processing in the rotary kiln. A rotary kiln is a steel round shell with refractory lining that rotates

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  • 11.23 Taconite Ore Processing
    11.23 Taconite Ore Processing

    11.23.2 Process Description2-5,41 Processing of taconite consists of crushing and grinding the ore to liberate iron-bearing particles, concentrating the ore by separating the particles from the waste material (gangue), and pelletizing the iron ore concentrate. A simplified flow diagram

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  • difference between rotary kiln and straight grate technology
    difference between rotary kiln and straight grate technology

    grate furnace kiln taconite stablesbusinessparkcoza These are typically fed to a blast furnace or DRI plant as part of the process to is the only supplier of both Straight Grate and Grate Kiln pellet plants the making of iron and steel SEAISI the very large deposits of iron bearing rock called taconite which underlie much of

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  • direct reduction of iron in tunnel kiln
    direct reduction of iron in tunnel kiln

    iron pellet reduction in sponge iron kilns direct reduced iron and its production processes ispatguru, mar 16, 2013 direct reduced iron dri is technically defined as iron ore which a rotary kiln but the development of the modern direct reduction dr to 10 to 30mm or iron ore pellets produced in an iron ore pellet plant since dri

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  • drying and preheating processes of iron ore pellets in a
    drying and preheating processes of iron ore pellets in a

    Jan 21, 2013 Process for producing iron ore oxidized pellets from magnetite …. Various iron - ore pellet heating and firing processes are known including the use of grate kilns, … drying, preheating at a temperature of 1050.degree. More detailed

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  • Coal based Direct Reduction Rotary Kiln Process –
    Coal based Direct Reduction Rotary Kiln Process –

    Feb 14, 2017 Dolomite is used as sulphur scavenger which finally comes out with the char. Char contains ash of coal and other impurities of iron ore. The reactions inside the kiln take place in several stages during the reduction of iron ore to DRI. Iron ore undergoes the following

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  • Direct Reduction Process - an overview | ScienceDirect
    Direct Reduction Process - an overview | ScienceDirect

    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 Iron (HBI) and Cold Briquetted Iron (CBI); also Low Reduced Iron (LRI), which is pre-reduced iron ore with a reduction and metallisation degree lower than that for common DRI

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  • DRI production | International Iron Metallics Association
    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 and/or lumpy form

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  • Direct Reduced Iron and its Production Processes
    Direct Reduced Iron and its Production Processes

    Mar 16, 2013 Direct reduced iron (DRI) is the product which is produced by the direct reduction of iron ore or other iron bearing materials in the solid state by using non-coking coal or natural gas. Processes which produce DRI by reduction of iron ore below the melting point of the iron are normally known as the direct reduction (DR) processes

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  • CASE GROUP
    CASE GROUP

    The process of Tunnel Kiln uses fines of Iron ore and Coal which are mixed together in specified proportions to eventually make DRI having quality grades of 90% plus metallization. Iron Ore Fines and Coal Fines mixed together are loaded into SiC (Silicon Carbide) beakers which are then loaded onto the cars. The cars are made to pass through the Tunnel kiln

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  • Rotary Kiln Manufacturers | Electrotherm E&T
    Rotary Kiln Manufacturers | Electrotherm E&T

    Coal Based Rotary Kiln for Direct Reduced Iron / Sponge Iron (100 TPD, 350 TPD, and 500 TPD) Solid-state reduction of Iron Ore using either coal/gas as a medium of reduction to produce a substitute raw material for steel making is termed as Direct Reduced Iron (DRI). Since DRI is produced by removing oxygen from iron ore, its structure is just like a sponge with a network of connecting pores

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  • A Case Study on Accretion Formation in Rotary Kiln of
    A Case Study on Accretion Formation in Rotary Kiln of

    Nov 13, 2020 DRI as well as accretion formation depend on hold-up time of charged material in the kiln, which is decided by rotation of kiln. In the present case, rotation of the kiln was maintained around 0.5 rpm. The maximum output from the kiln per day was 70% and during the accretion formation as low as 36%

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  • OPERATIONAL ASPECTS OF SPONGE IRON
    OPERATIONAL ASPECTS OF SPONGE IRON

    Sponge iron process uses a rotary kiln for the reduction of high grade lump ores or pellets (Fig. 1). The feed is introduced together with reducing and de-sulphurizing agents (lime- stone or raw dolomite) into an inclined rotary kiln, heated counter current to the flow of hot gas and reduced to form sponge iron

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  • THE KRUPP SPONGE IRON PROCESS PRODUCTION
    THE KRUPP SPONGE IRON PROCESS PRODUCTION

    Essential features of the process Fig. 1 shows the two variants of the process, one using lump ore and the other fine ore or con-centrates. Lump ore is charged together with the reductant and a desulphurizing agent into an inclined rotary kiln, where it is heated by a coun-tercurrent flow of hot gas and reduced to sponge iron

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