Sponge iron production process. DRI unit; ... and it is taken into the rotary cooler in which the product get cools down and is separated from the coal char. Some of the basic reactions that may be included in the process are ... After CO reacts with the oxygen it is converted into O2 and it automatically generates heat.
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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 ...
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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 ...
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HOW TO CALCULATE CARBON FOR SPONGE IRON MAKINGIn this video we know how to calculate carbon /ton, DRI and how to calculate coal quantity for kiln inlet and o...
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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...
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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 ...
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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. Raw material mixiron ore, dolomite and coal are fed to one end of rotary Kiln as well as some fine coal also fed from discharge end and product sponge iron along with char is taken out from the other ...
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The product from this process is called DRI or sponge iron or hot briquette iron (HBI), which is a highly metalized solid that still contains gangue minerals, and hence needs further purification . The direct reduction method was adopted by Delta Steel Plant in Nigeria, while they were still in operation [ 26 ].
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The Fastmelt, Redsmelt, and Sidcomet processes use a rotary reduction furnace and final smelting of the hot sponge iron into HM in a melter. DRI can be charged in BF, EAF, or BOF. Coalbased DR processes are most attractive for India and China, with an extensive raw coal supply, limited scrap supply, and competitively priced NG.
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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 ...
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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%).
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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.
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In the years to come, India's expanding steel production will be largely driven by sponge iron. Sponge iron, also known as direct reduced iron(DRI), 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. Sponge iron gives a cheaper way of producing steel which has a high demand in the market.
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I. Introduction Mill scale is an iron oxide waste generated during steelmaking process, casting and rolling. The mill scale contains very high percentage of iron which is generated during making of steel towards production of various long and flat products.
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Renewable biomass is a potent, CO2 neutral substitute to fossil coal and coke in iron making. However, there has been relatively little work on the utilization of biomass for the production of directly reduced iron (DRI). The aim of the present work is to characterize Acacia nilotica (W1), Albizia lebbeck (W2), and Leucaena leucocephala (W3) biomass and to reduce iron ore pellets primarily ...
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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 ...
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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 ...
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The sponge iron is melted into the actual crude steel. This process will be discussed in more detail in the next section. In the directreduced iron (DRI) process, the iron ores are reduced directly to sponge iron by gaseous reducing agents! Electrosteel process. In the electric steel process, the sponge iron obtained from the direct reduced ...
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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.
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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 ...
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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
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Direct reduced iron (DRI), also called sponge iron, is produced by the reduction of iron ore (in the form of lumps, pellets or fines) with a reducing gas produced from natural gas or coal. This process is called direct reduction. ... Phase concentrations are converted to Femet, Metn and Ctot. The data from wet chemistry, those calculated with ...
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associated with iron ore as oxide removed from the particle is known as percentage reduction whereas the percent of iron as part of whole iron existing as metallic iron is called as degree of metallization in sponge iron technology. Sponge Iron Making Process(Coal Based) KruppRenn Process : The KruppRenn process was developed in 1930.
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