Fig 3 Process flow diagram for coal based sponge iron The hot reduced sponge iron along with semiburnt coal, discharged from kiln is cooled in watercooled cylindrical rotary cooler to a temperature of 100200°C. The discharge from cooler consisting of sponge iron, char other contaminations are passed on through
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This paper presents an approach to find the best modification in the coalbased sponge iron process with an aim to integrate energy in it. For this purpose, a few energy conservation cases are ...
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Sponge Iron manufacturing process is an alternative process to manufacturing of Steel through blast furnace route. Sponge Iron is also widely known as Direct Reduced Iron (DRI). ... S. Mondal, Operation of CoalBased Sponge Iron Rotary Kiln to Reduce Accretion Formation and Optimize Quality and Power Generation, 2012, pp. 727732.
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Direct reduced iron (DRI) is also known as sponge iron (Hasambeigi et al. 2014 ). This high porous material has a metallization degree in the range 8595% with a carbon content in the range % depending on the processing route. During the process, the iron oxides are reduced at the solid state.
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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. ... Coal based process. In a coal based process, the reactor for the reduction reaction is a rotary ...
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Recovery and utilization of waste heat in a coal based sponge iron process (PDF) Recovery and utilization of waste heat in a coal based sponge iron process | Vivek kumar bir98bir no longer supports Internet Explorer.
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VOL. 5 NO. 1 OCTOBER, 2010 STEEL TECH 11 from an industrial coalbased sponge iron rotary kiln process. We have developed a fairly comprehensive mathematical model for the direct reduction of iron ore
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The present paper proposes two energy integration options, Option1 and Option2, to compare power generation and preheating scheme in sponge iron accounts power generation whereas in Option2 preheating of feed material, slinger coal and kiln air is considered. These options utilize heat of waste gas that exits the after burning chamber of the process, which is available from ...
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The efficiency of the coal based sponge iron process is defined as the energy needed for the reduction reactions compared to the energy added to the system. Due to chemical reactions and combustion the heat generated inside the kiln is Gcal/h and the heat value of coal input is Gcal/h resulting in a thermal efficiency of the process ...
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SAFETY GUIDELINES FOR IRON STEEL SECTOR MINISTRY OF STEEL, Direct Reduction GOVT. OF INDIA Plant (Coal Based) Doc. No: SG/32 Rev no. : 00 Effective Date: 1. OBJECTIVE: The main function of making Sponge Iron in the Kiln is to convert Iron ore into sponge iron by using Iron ore, coal and dolomite / limestone. The Sponge Iron is processed
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Increasing pellatisation capacity of the country based on large iron ore deposits with high proportion of fines,'blue dust. Long term policy in respect of allotment and pricing of natural gas and coal to sponge iron industry. Coal authorities should pay special attention for production Of superior grade noncoking coal to cater to the needs of ...
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Iron ore or pellets, reductant ( noncoking coal or natural gas) and limestone/dolomite are the main raw materials for DR technology. For the successful operations, the process of DR technology has specified the characteristics of the raw materials to be used in the process. The principal raw materials used in DR/sponge iron processes are ...
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In chemical industry: Benzene. .from the carbonization (heating) of coal, which produces coke, combustible gas, and a number of byproducts, including benzene. Carbonization of coal to produce illuminating gas dates back in England to the very early years of the 19th century. The process is still employed in some countries, but more use is..
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This is the case study of typical coal based sponge iron plant of 500 tonne per day capacity. The process flow diagram (PFD) of the sponge iron process is shown in Fig. 1. ... The modified PFD for sponge iron process based on HEN is shown in Fig. 4 where grey lines shows the ducts to carry waste gas from chimney to exchanger1 (shown through G
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Coal gasificationbased sponge iron plant of Jindal Steel Power Ltd in Angul, Odisha, may become a game changer in the coming years. This plant is likely to be commissioned in 2013. Cost of syn gas and efficient running of gasifiers will be the key of success of this promising sponge iron process route.
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The major difference between the gas and coal based DRI processes is the incorporation of coal in the later. In fact in coal used by sponge iron produces in India contains as high as 40% ash.
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Jun 23, 2023. Around percent of the sponge iron produced in India in 2022 was under coal based process route. This was due to numerous coal based units present in the mineral rich states. The ...
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After the reduction process, a mixture of sponge iron and char is discharged from the kiln into the cooler where cooling takes. Water is sprayed at the cooler shell to indirectly cool the material from about 1000 ℃ to 120 ℃. ... Kaltenthaler, E.: Healthrelated qualityoflife of coalbased sponge iron plant workers in Barjora, India: a ...
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Coalbased sponge iron process The process of the direct reduction of haematite in a rotary kiln is schematically described in the Fig. 1. Haematite and noncoking coal are fed to the kiln at controlled rates without premixing and the charge moves through the kiln depending upon the rotation
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Looking forward to the need of developing coalbased sponge iron technology in India, a country having no significant resources of either coking coal or natural gas, the Research and Development ...
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Coal Based Sponge Iron / DRI. ... For producing the sponge iron through this process requires high grade of iron ore and non coking coal. Gas Based DRI / HBI. 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 preferred metallic, energy efficient and ...
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Broadly two types of technologies are used for producing sponge iron, for coal based plants, coa l . ... Figure III: Process Flow Diagram of Coal Based Sponge Iron Plant alon g with Sources of .
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However, for coalbased DR the reductant is generated from noncoking coal and rotary kilns, rotary hearth furnaces and multihearth furnaces are used (Ghosh and Chatterjee, 2017). It has been estimated that approximately 6575% of sponge iron production cost is attributed to the cost of raw materials (Indian Bureau of Mines, 2011).
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يرغب أحد موردي المواد من بلجيكا في إنتاج مسحوق الحجر الجيري لملابسه...
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