CN104215064A For the direct reduction of iron ore straight tunnel kiln 12/17/2024 CN101939607B Improved burning system 12
Get PriceCoal based Direct reduction process is classified based on the reducing agent namely solid Most solid reduction process use non coking coal as reducing agent due to abundantly available non coking coal The process proposed to be adopted is the rotary kiln proposes using Non coking coal and iron ore
Get Priceadvantage in fuel reduction The range of GKT tunnel kilns for the refractory industry covers sintering lines for silica refractory clay high alumina zirconium ceramic direct bound or rebounded magnesite chromium magnesite dolomite and magnesia spinel brick magnesium calcium zirconium brick etc All GKT tunnel kilns are modular designed and
Get PriceKunichika KUBOTA The Japanese traditional steel making method which manufactures steel Kera or pig iron Zuku from iron sand and charcoal is so called Tatara steel making process The
Get PriceStudies on the direct reduction of carbon bearing pellets made from discarded copper slag have been conducted in this paper They include the influences of reduction coal content limestone content industrial sodium carbonate content reduction temperature reduction time and layers of carbon bearing pellets on reduction effect Finally the optimum conditions have been obtained The pilot
Get PriceHigh grade iron ore This kind of ore can be applied in the following three technologies 1 Coal based one step method direct reduction producing metallic pellets DRI product and tunnel kiln、BLT reduction kiln method producing sponge iron Coal based one step method reduction technology That is to say Chain grate machine secondary
Get PriceSponge Iron also known as Direct Reduced Iron is the product produced out of using iron ore The iron ore is processed through reduction process by the use of gas that emits from natural coal gas resource CASE Group of Industries manufactures sponge iron by using tunnel kiln following reduction of iron ore through Static Kiln Briquetted Iron
Get PriceTunnel kiln sintering reduced iron powder is to use a row of reduction tanks on the kiln car and put the items to be fired into the silicon carbide reduction tanks for sintering Therefore in the sintering process the reduction tank has to withstand high temperature and air scouring and changes in cooling and heating cycles
Get PriceKD65 DOL High purity sintered dolomite that is sized blended with magnesite pressed into a brick shape then fired in a high temperature tunnel kiln to create a strong ceramically bonded brick KD65 DOL is a premium quality refractory for more aggressive wear areas in tuyere pads and slaglines of AOD s VOD s and ladle furnaces
Get PriceIndustry test on phosphorus removal and direct reduction of the Ningxiang type high phosphorus oolitic hematite ore has been carried out in a tunnel kiln on the basis of laboratory experiment The iron grade and phosphorus content of the initial sample are 42 46% and 0 867% respectively The results showed that high phosphorus oolitic hematite could be exploited on industrial scale
Get PriceThe rotary kilns are used to remove oxygen from the hematite iron ore through direct reduction process using non coking coal as the fuel and reducing agent Our rotary kilns are known to produce sponge iron rich in metallic iron pure iron with consistent chemical and physical characteristics which give steelmakers the needed flexibility to
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Get PriceIn the newly designed sponge iron rotary kiln system a coarse coal branch pipe and fine coal branch pipe are added at the kiln head The original way of adding 100% coal at the kiln head is changed to 50 70% coal is added together with fine iron ore and dolomite through the mixing mode at the kiln tail and the remaining 30 50% coal is added
Get PriceThe 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 RHF is not a new technology
Get PriceThe tunnel kiln direct reduction of iron is a volumetric method in which raw material consumption is based on the volumetric capacity of refractory crucibles This process requires non coking coal with less than 10% volatile material ash content up to 25% more than 65% carbon and particle size that may typically vary between 0 5 mm and 7 mm
Get PriceCrushing News dri tunnel kiln for iron reduction Crusher … redution of iron ore in tunnel kiln process technology Direct Reduced Iron … as low as 4 3 gcal/metric ton of DRI … DRI using Iron Ore Fine in …
Get PriceCeramic Tunnel Kiln Project We are supplier and manufacturer of Tunnel Kiln Kilns for large volume production of Tableware Pottery Sanitary ware Refractories and Technical Ceramics Regardless of the product to be fired we offer a complete range of tunnel kilns designed to suit specific requirements Temperatures from 300 o C to 1700 o C
Get PriceTunnel Kiln Process Hoganas has developed a process in 1908 which uses coal as a reductant The carbothermic reduction of iron ore takes place in horizontal tunnel kiln Reduction mix consisting of coal or coke fines of the size 3 mm or below anthracite and limestone is charged with iron ore in ceramic muffles/saggers
Get PriceRotary kilns are a large rotating drum that can be either of the direct or indirect configuration In the direct configuration the kiln can be designed for either co current parallel or counter current air flow As solids pass through the drum the heating medium increases their temperature
Get PriceThe reducing media used are mainly non coke reducing agents such as coal natural gas and coal gas The equipment used in the production of sponge iron by the direct reduction method mainly includes a shaft kiln square kiln annular kiln rotary kiln tunnel kiln and continuous furnace at the bottom of the trolley etc
Get PricePhD Graduate Material Science and Engineering Sharif University of Technology Cited by 67 Kinetic and Thermodynamic of Metallurgical Processes Material Extraction and Purification
Get Priceon reduction of iron ore yielding a highly porous sponge iron which subsequently is comminuted to powder The latter process is based on atomization of a stream of liquid iron or steel by means of a jet of pressurized water Both processes will be described in Reduction in Tunnel Kilns Approximately 1200°C 9 Discharging
Get Pricereduction reaction in tunnel kiln process for iron ores Modelling and optimization of a rotary kiln direct reduction process 55 Figure 3 Kiln temperature distribution for the base case The feed material bed enters the kiln at ambient temperature and rapidly heats up due to the hot gas in the freeboard
Get PriceCSIR has derived a direct reduction concept that consists of an indirectly heated tunnel kiln in which agglomerated Þne material can be processed at temperatures up to 1400uC without problems caused by softening or sticking No other type of kiln has been identiÞed in the literature that can process such materials continuously in the solid
Get PriceSponge Iron also called Direct reduced iron DRI is produced from the direct reduction of iron ore in the form of lumps pellets or fines to iron by a reducing gas or elemental carbon produced from natural gas or coal Direct reduction processes can be divided roughly into two categories gas based and coal based In both cases the
Get PriceTUNNEL KILN Coal based DRI Plant Production of sponge iron by Tunnel Kiln technology was developed in 1911 as Höganäs method About Sponge Iron/DRI Sponge Iron also known as Direct Reduced Iron is the product produced out of using iron ore The iron ore is processed through reduction process by the use of gas that emits from natural coal
Get PriceREITEC TUNNEL KILN DIRECT REDUCTION REITEC TUNNEL KILN DIR PROCESS 1 Iron ore powder Feeding Iron ore powder which contains 8 10% moisture into drying machine for drying Heat of the drying … TUNNEL KILN PROCESS of iron ore reduction Quarrying … 4 Flow charts for tunnel kiln process for direct reduction with conventional
Get PriceCoal Based Rotary Kiln for Direct Reduced Iron / Sponge Iron 100 TPD 350 TPD 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 View Details Send Enquiry
Get PriceTunnel Kiln Technology Rotary Kiln Technology Paired Pushing Kiln Technology Chain Grate Rotary Kiln Machine Tech High Density Metallized Pellet HDDRI Iron Ingot Sponge Iron Granular Iron Oxidized Pellet CONTACT US Contact Person Mr Zhibin Jiang Contact Phone 0086 510 87820959
Get PriceMarket share About 23% of sponge iron total production 4 Tunnel furnace process This process is the oldest direct reduction method In this method Thermal coal is mixed with iron ore as a reducing agent Natural gas generates the required reduction temperature and reduction is performed on Silicon Carbide SiC Crucibles in a tunnel furnace
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