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using coal-fired rotary kilns or natural gas-fired shaft furnaces are logical choices as production in blast furnaces is constrained by the need to import coking coal. Rotary kiln DRI capacity has been installed because it makes use of domestic iron ore and coal, but there is …
Get PriceFor sulphur removal in the ore dolomite limestone is used and the reactions are as follows feo h2s fes h2o fes cao co fe cas co2 reaction mechanism the reaction occurring inside the bed of iron ore and coal are heterogeneous in nature two sets of reaction take place set 1 between coal carbon dioxide and oxygen
Dec 01 2018 to illustrate the order of magnitude for grid balancing services of an hdr steel plant we assume a plant capacity of 15 mty 2 that for optimal continuous operation needs 129 mw of installed eaf capacity and 411 mw in electrolyser resulting in an electricity consumption of 522 twhy if the electrolyser is dimensioned 30 larger than
Coal based direct reduction rotary kiln process ispatguru raw material mix consisting of iron ore dolomite and noncoking coal is fed at the one end of the rotary kiln and is heated by coal burners to produce dri the product dri along with char sometimes
Sep 01 2015 in conventional coal based sponge iron plant fig 1 kiln feed stream no 1 which consists of iron ore feed coal and dolomite is fed to the rotary kiln rka separate conveyor collects different size fractions of coal stream no 5 for injection into the kiln with the help of pressurized air stream no 4 from discharge
In dri plant consumption of coal ore and dolomite in dri plant consumption of coal ore and dolomite 20107201 1introduction n ispat power private limited has a proposal to manufacture 200 tpd of sponge iron 200 tpd of mbillets 200 tpd of rolled products and 14 mw of power in gaurmudi village tamnar tehsil raigarh district chhattisgarh
Jun 01 2012 it reduces the coal consumption by 87 less in comparison to the existing system it thus also reduces the amount of waste gas generated by 167 due to reduction of coal consumption by 87 a profit of rs 96 million can be earned per annum which gives payback period for this design modification is 124 months 2
Noncoking coal is fed to coal washery and the washed coal 5 to 22 mm is sent to dri plant for further processing iron ore lump from stock yard through raw material processing plant rmpp and dolomite from trucksground hoppers is also fed to dri plant for processing the output dri is
Now the coal if the desired temp for reduction process is obtained iron ore with dolomite is fed from inlet of the kiln since the kiln has a downward slope of 25 from the feed end side to discharge end side its rotation causes the iron ore amp coal to mix and travel through the system
Price comparison of direct reduced iron using natural gas and coal 0 20 40 60 80 100 120 2000 2005 2010 2015 2020 2025 2030 p r i c e u s t o n c r u d e i r o n year direct reduced iron dri natural gas direct reduced iron dri coal source us energy information administration annual energy outlook 2013 assumptions consumption
B proposed raw material consumption t of product iron ore pellets coal indigenous grade bc dolomite iii total raw material consumption 145 120 004 269 tt of product hence total reduction in raw material feed due to usage of pellets amp high grade coal reduction in coal consumption 324269 150120 055 tt of product
Size ore 518mm dolomite production flow chart dri plant b4 dimension chemical composition bendcamber n2 content macro examination sulphur print get price chat online
Directreduced iron dri also called sponge iron is produced from direct reduction of iron ore in the form of lumps pellets or fines by a reducing gas produced from natural gas or coal the reducing gas is a mixture majority of hydrogen h2 and carbon monoxide co which acts as reducing agent
Obviously a dri plant needs h2 and co these are called the reducing gases in all existing dri plants these gases are generated from either natural gas or coal however over 90 of dri is produced using natural gas as its fuel source this can be seen in table i in addition the currently available coal
Most of the plants in india use dri processa solid state direct reduction process by which iron ore is reduced to sponge without phase change raw material mixiron ore dolomite and coal are fed to one end of rotary kiln and product sponge iron along with char is taken out from the other end apart from this primary and secondary airs are
Consumption of coal can be reduced due to availability of better raw material quality the specific consumption of the raw materials has reduced this has made it possible to produce more dri using the same equipment the quality of raw materials like iron ore coal amp dolomite has improved due to following iron ore
Raw material consumption tpa sources method of transportation for dri sponge iron iron ore 144000 barbil orissa nmdc chhattisgarh by rail amp by road coal 117000 secl chhattisgarh mcl orissa imported coal by rail amp by road dolomite 4500 raipur durg by road covered trucks for induction furnace ms billets
This product is known as direct reduced iron dri or sponge iron dri plants are much higher than that of coalbased are iron ore and coalnatural gas the excessive nes gen
Building materials equipment rotary kiln for sponge iron sponge iron rotary kiln process sponge iron composition manufacturing process lloy sponge iron making is a process in which iron ore lumps typically 5mm18mm size are tumbled with a selectgrade of ironcoking coal little dolomite inside an inclined rotary kiln and control busted in the presence of air for about 12 hours before the
Dolomite is an important ingredient and acts as a desulphuriser removing sulfur from the feed mix during the reduction processit is mixed in small proportions along with other raw materials before charging into the kilncontrol of sulphur content is an essential prerequisite for the manufacture of good quality steel
Sponge iron plants of 350tpd coal based rotarykilns 105000 tons per for theproduction of sponge iron are iron ore non coking coal and dolomite weprocure coal from mahanadhicoal ltd and imported coal from south africaindonesia get quote coal based dri plant manufacturer from greater noida manufacturer of coal based dri plant
Clay dolomite grinding plant clay dolomite crusher 2013 3 roller grinding mill amp jaw crusher verified we coal based dri production in raigarh jspl dolomite mining processdolomite
Same size ie 3mm dolomite is also mixed along with the external coal to prevent the increase of sulphur in the reduced iron the quantity of dolomite used is maximum 9 by weight of the iron oxide he thermal t efficiency of gasifier coal is high with 50 to 55 fc to 30 vmand 27 reduction coal is
Coal based sponge iron plant machinery equipment coal based sponge iron plant pdf coal based sponge iron plant pdf as a leading global manufacturer of crushing and milling equipment we offer advanced rational solutions for any sizereduction requirements including quarry aggregate grinding production and complete stone crushing plant
1 energy saving reduction in consumption of coal in blast furnaces the use of dri as blast furnace feed enables reduction in coal consumption in blast furnaces when 100 kg of dri is used for the production of 1 ton of molten iron the consumption of coal in blast furnaces will be reduced by 50 60 kg 2 reduction in co2 emission
Jul 14 2014 most of the plants in india use dri processa solid state direct reduction process by which iron ore is reduced to sponge without phase change figure 1 raw material mixiron ore dolomite and coal are fed to one end of rotary kiln and product sponge iron along with char is taken out from the other end apart from this primary
Ore based metallics direct reduced iron dri overview direct reduced iron dri is the product of the direct reduction of iron ore in the solid state by carbon monoxide and hydrogen derived from natural gas or coal eaf steel plant dri can be either hot or cold charged to the eaf
Also the demand for direct reduced iron as a charge material of eaf has increased lump ore or pellets coal and limes tone are charged in controlled dr plant consumption 100 kwhtonne dri
Iron ore coal and lime stone or dolomite are introduced into the preheated reactor at controlled rates through a feed pipe mounted through the feed end housing because the reactor is inclined from both the feed end to the discharge end its rotation causes the iron ore and coal to
May 08 2013 the thumb rule equation for calculating total flux consumption in kg per ton of liquid steel is flux consumption kg t 4531 02416 x dri percent charging methodology with the increased use of dri in eaf steelmaking charging methods have changed with a captive dri plant the percent of dri in the eaf charge is normally high such
Our standard rotary kiln 48 x 80 m is capable of producing up to 160000 tons dri per annum depending on the raw material in the slrnxtra version this figure goes up to 200000 ta typical consumption figures per ton of dri produced from lump ore or pellets are iron ore 146 t coal 380450 kg cfix depending on coal properties
