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 ...
WhatsApp: +86 18203695377
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 ...
WhatsApp: +86 18203695377
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 ...
WhatsApp: +86 18203695377
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 ...
WhatsApp: +86 18203695377
Coal based DRI making process. Iron Ore and noncoking coal are the prime raw materials for the production of sponge iron. These are charged into a rotary kiln in requisite proportion along with some dolomite which acts as a desulphurized. ... The crucial factor in this reduction process is the controlled combustion of coal and its conversion ...
WhatsApp: +86 18203695377
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:
WhatsApp: +86 18203695377
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 ...
WhatsApp: +86 18203695377
Direct reduced iron (DRI), also called sponge iron due to its porous nature, is produced in reactors that directly reduce (remove) the oxygen from the iron oxides in iron ore. Unlike the chemical reactions that happen in the blast furnace, the DRI process is done without having to melt the iron ore. This direct reduction process is how the ...
WhatsApp: +86 18203695377
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...
WhatsApp: +86 18203695377
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 ...
WhatsApp: +86 18203695377
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.
WhatsApp: +86 18203695377
Pig iron Direct reduced iron Figure 1: Iron production, 2000, 2010, 2019 Source: (WSA, 2020) India is the country with the largest DRI production, reaching 34 Mt in 2019, accounting for around a third of global DRI (WSA, 2020). The majority of Indian DRI is produced via the coalbased route, using rotary kilns, making partly use of domestic coal.
WhatsApp: +86 18203695377
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.
WhatsApp: +86 18203695377
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 ...
WhatsApp: +86 18203695377
Sponge Iron Making Process(Coal Based) KruppRenn Process : ... Sponge Iron Ferro Alloys 9 In Midrex process reform gasses entering the reduction furnace at around 800 ... continuously convert iron ore fines into a highly reduced product, usually in the form of briquettes. The first of the reactor preheats the ore and reduction is started in the
WhatsApp: +86 18203695377
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
WhatsApp: +86 18203695377
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).
WhatsApp: +86 18203695377
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.
WhatsApp: +86 18203695377
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.
WhatsApp: +86 18203695377
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?
WhatsApp: +86 18203695377
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.
WhatsApp: +86 18203695377
A material supplier from Belgium would like to produce limestone powder for his custome...
India is rich in various mineral resources and it is an important mineral processing market
Copyright © 2023 GMC Co., Ltd. SiteMap
