The employed fuels are natural gas and/or coal. The energy consumption is in the order of GJ/tDRI that is equivalent to 300 m 3 of natural gas per ton of reduced iron. The CO 2 emissions are quantified in the range t of CO 2 per ton of steel. As a function of the employed reducing reactors, the systems are of four main types:
The production of sponge iron requires sized of raw materials iron ore and coal. the sizing of raw materials involve the crushing, screening and conveying operation. During the crushing and screening operation fines are generated along with which the micron size dust flies in the air. coal is mostly received in higher
especially at the present situation where the sponge iron market is highly depressed. SPONGE IRON QUALITY The rotary kiln sponge iron has lower metallisation (about 85 — 88% on the average) and low carbon content (%) compared to gas based sponge iron (Metallisation of 92 — 94% and carbon content of — 2%).
DRI was used to observe the effect of different fractional reduction on the removal of impurities from pig iron melt during EAF melting. On the basis of results, three types of reduced flux DRI ...
Direct reduced iron ( DRI ), also called sponge iron, [1] is produced from the direct reduction of iron ore (in the form of lumps, pellets, or fines) into iron by a reducing gas or elemental carbon produced from natural gas or coal. Many ores are suitable for direct reduction.
The HYBRIT pilot plant in Luleå, Sweden has completed test production of sponge iron and demonstrates that it is possible to use fossilfree hydrogen gas to reduce iron ore instead of using coal and coke to remove the oxygen. Production has been continuous and of good quality. Around 100 tonnes have been made so far.
How To Calculate Iron ore:coal:Air:DRI:Flue gas:Char for sponge iron makingin this video we know how to calculate specific iron ore, coal, air requirement f...
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. Unlike the conventional process, the process does not require coking coal; the coke ovens in a steel plant are expensive and polluting units. Direct ...
sponge iron sector, which is dominated by smallsized coalbased direct reduction of iron (DRI)based plants. India is one of the unique countries in the world where coalbased DRI route contributes to nearly 20% of the total steel capacity in the country. The prominence of DRI route in the country is
Sponge Iron Plant—WHR in Rotary Kiln Directly Reduced Iron (DRI) Production. Here, directly reduced iron (DRI) is produced in a rotary kiln of 36 m diameter and approximately 85 m length installed at an incline. The capacity of the kiln depends on metallization degree and usually does not exceed 225,000300,000 t/year (Fig. 2). It ...
EAF also consumes the products of DRI, also referred as sponge iron. DRI is as pure as pig iron and is an ideal feedstock to EAF efficiency gains. As a feedstock, EAF can take any fraction of sponge iron (from 0% to 100%). The DRIEAF combination allows for higher electrification and lower emission if lowcarbon feedstocks and electricity are used.
The appearance of iron ore is completely changed when it gets converted to sponge iron of its composition. The hematite iron ore is ... is called DRI /sponge iron and the weight of the product becomes lighter due to removal of O 2 ... The hot reduced sponge iron along with semiburnt coal, discharged from kiln is cooled in watercooled ...
A new route for making steel from iron ore based on the use of hydrogen to reduce iron oxides is presented, detailed and analyzed. The main advantage of this steelmaking route is the dramatic reduction (90% off) in CO2 emissions compared to those of the current standard blastfurnace route. The first process of the route is the production of hydrogen by water electrolysis using CO2lean ...
admin Sponge iron, also called direct reduced iron (DRI), is made from directly changing iron ore (in any form whatsoever) to iron by a cutback gas or carbon, produced from natural gas or coal. It is one of the many raw materials used in sponge iron. Specifications WHY IS IT CALLED SPONGE IRON?
There are different types of raw materials used for sponge iron making and steel products Like Coal, Iron Ore, and Dolomite Iron ore and decoking coal are the main raw materials to produce sponge iron. They are charged into the rotary kiln in the required proportion together with some dolomite used as a desulfurizing agent.
Sponge iron units of the country are facing an acute coal shortage, said an industry official. "Of the 450 direct reduced iron (DRI) units that produce sponge iron in the country, 105 are ...
Coalbased sponge iron/DRI also has limitations in use due to its high sulphur and phosphorus content, and low carbon and metallization. ... The conversion of iron ore fines (size: −1 to + mm) to iron carbide takes place in a circulating fluid bed reactor, where the preheated ore reacts with the reducing constituents of the natural gas ...
Raw material utilization and waste generation for the DRI suggest that tonnes of ore, tonnes of noncoking coal and tonnes of dolomite are needed to produce 1 tonne of sponge iron and ...
Monthly average prices of sponge iron, specifically pelletbased DRI (PDRI), experienced a slowdown. ... the conversion spread from sponge iron to billets had increased by 9% mom in Raipur ...
Sponge Iron is a form of direct reduced iron that is produced from the reduction of iron ore in the form of lumps, pellets, or fines using a reducing gas such as hydrogen, natural gas, or coal. There are three main types of Sponge Iron: DRI (Direct Reduced Iron): It is produced in lump or pellet form and is often used as a feedstock in the ...
Direct reduced iron (DRI) also referred to as sponge iron is produced by reducing iron ore directly into iron through the use of a reducing gas, such as natural gas or coal, or even by the use of elemental carbon, such as carbon dioxide. Moreover, the production of highgrade steel, awareness of CO2 emission control, and increasing ...
Iron ore is preheated and fed into a reduction shaft, where it is converted to direct reduced iron (DRI) and further compacted to hot briquetted iron (HBI). Hydrogen generated in an electrolysis unit is preheated in a condenser before being supplied to the shaft where it acts as the reducing agent.
Raw material utilization and waste generation for the DRI suggest that tonnes of ore, tonnes of noncoking coal and tonnes of dolomite are needed to produce 1 tonne of sponge iron and tonnes of solid wastes [2, 5].This implies that for every 10 tonnes of sponge iron produced, almost 2 tonnes of solid wastes are produced in the form of semiprocessed iron and coal char.
DRI production. Direct reduction of iron is the removal of oxygen from iron ore or other iron bearing materials in the solid state, 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.
iron. and reheating Emissions varies based on how electricity is generated ( coal or nuclear) BFBOF route: 1,600 2,000 kg CO. 2 /ton HRC Limited potential to reduce further (mature technology) Capture / reuse if possible EAF (scrap) route : 500600 kg CO. 2 / ton HRC EAF can be misleading: scrap / OBM were previously converted from ...
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