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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This is because DRI is produced by removing O2 from iron ore. It is also known as sponge iron since its structure is just like sponge with a network of connecting pores. These pores results in a large internal surface area which is around 10,000 times greater than the internal surface area of solid iron. DRI is produced in many forms.
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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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visit to spong iron division direct reduction iron basic concepts
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Again a lot of coal fines and coke breeze are also produced during coal mining and coking of coal respectively. Utilization of iron ore and coal fines for extracting metal is of vital concern for resource conservation and pollution control. The other option is to convert the iron ore and coal/coke fines into composite pellets/briquettes.
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DRI (containing 9094% total iron) is an excellent feed stock for electric furnaces used by mini steel plants, allowing them to use lower grades of scrap for the rest of
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In India there are many small rotary kiln furnaces producing DRI, known locally as sponge iron, using coal as energy and reductant source. Some of the sponge iron plants are captive to steel mills, but there is a significant domestic merchant market, India producing 57% of its crude steel in electric arc furnaces (2016).
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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 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:
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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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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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Coal is a combustible black or brownishblack sedimentary rock, formed as rock strata called coal is mostly carbon with variable amounts of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen. Coal is a type of fossil fuel, formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years.
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Abstract A survey is made on a typical coal based Indian sponge iron plant of capacity 500 t/d in order to identify the largest energy losses Nomenclature hr heat transfer coefficient from outer surface of rotary kiln to outside atmosphere, kJ/h m 2 D diameter, m L length, m m mass flow rate, kg/h T temperature, °C Q heat load, kJ/h Cp
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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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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 ). The DRIEAF combination allows for higher electrification and lower emission if lowcarbon feedstocks and electricity are used.
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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.
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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?
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Sponge iron produced using the non coking coal is called coal based sponge iron / DRI. For producing the sponge iron through this process requires high grade of iron ore and non coking coal. ... In this process route, iron oxides are converted to the DRI / HBI by using natural gas in a vertical shaft furnace. For steel producers, it is a ...
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The iron also can be produced from its ore by the direct reduction of iron ore by a reducing agent which is coal based or may be a gaseous reducing agent, which is called direct reduced iron (DRI) or sponge iron. DRI is a good substitute of scrap for making steel in electric arc furnace, basic oxygen furnace, etc. and there has been a rapid ...
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The various advantages of iron ore pellets are given below. Iron ore pellet is a kind of agglomerated fines which has better tumbling index when compared with the iron ore and it can be used as a substitute for the iron ore lumps both in the BF and for DRI production. Pellets have good reducibility since they have high porosity (25 % to 30 %).
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HOW TO CALCULATE COAL REQUIREMENT FOR DRI MAKINGin this video we know how to find coal requirement for specific iron ore feed in side the sponge iron kiln an...
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