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. 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. ...
S) gas removal process utilizing low concentration hydrogen peroxide (H. 2. O. 2) solutions to remove/oxidize H. 2. S acid gas from a typical biogas stream generated by a dairy farm anaerobic digester. The work of the University of Louisville Food Processing Laboratory was conducted as proof of concept for claims made in United States Patent ...
Jul 29, 2010· The carbon content in sponge iron produced by coal based rotay kiln processes are generally low and is in the range og 0.08% to 0.20%.The carbon content in gas based processes can be controllrd to a level of 1.5% to 2.0% based on requirement for steel making.
Hydrogen-based metallurgical process In the HYBRIT- concept, specially developed iron ore pellets are reduced by hydrogen gas in a so-called direct reduction process. Reduction occurs in a solid state at a lower temperature than in the blast furnace process and produces an intermediate product, sponge iron or direct reduced iron (DRI), with ...
Sponge iron produced either by coal or gas based route posses poor thermal conductivity as a result, heat generated by exothermic re-oxidation reaction within the pile cannot be dissipated away and lead to temperature build-up in DRI, and thus, leads to accelerates the corrosion.
1. Characteristics of reduced iron The MIDREX process produces direct reduced iron (hereinafter referred to as DRI ). The process reduces iron ore using a reforming gas made from natural gas. The DRI is used mainly as the raw material for electric arc furnaces (EAFs), as a clean iron source substitute for scrap iron.
Dec 24, 2018· Direct reduced iron (DRI), also called sponge iron, is produced from the direct reductionof iron ore (in the form of lumps, pellets, or fines) to iron by a reducing gas or elemental carbon ...
Oct 12, 2017· Direct-reduced iron (DRI), also called sponge iron, is produced from the direct reduction of iron ore (in the form of lumps, pellets or fines) to iron by a reducing gas or elementary carbon ...
Sponge Iron Plant Technology – MIDREX, Gas based Commissioned -1994 Original capacity-1.0 MTPA World's first mega module DRI plant. Current capacity -1.6 MTPA Modifications carried out in 2005 Successfully operated with Iron ore Lump in feed mix. Achieved annual production of 1.37 MMT in …
It uses a patented proprietary mixture of ferric oxide and triferric oxide to react with H2O to sweeten gas streams. In SulfaTreat process the iron oxides are supported on the surface of an inert, inorganic substrate forming a granular material, while in the iron sponge process the …
i) Direct Reduced Iron: Production. ... coal-based DR process and (2) gas-based DR process. Details of DR processes, reoxidation, storage, transportation, and application of DRI are discussed in ...
James G. Speight Ph.D., D.Sc., in Natural Gas (Second Edition), 2019. 8.5.1 Iron sponge process. An example of a hydrogen sulfide scavenger process is the iron sponge process (also called the dry box process), which is the oldest and still the most widely used batch process for sweetening of natural gas and natural gas liquids (Anerousis and Whitman, 1984).
Dec 24, 2018· Direct reduced iron (DRI), also called sponge iron, is produced from the direct reductionof iron ore (in the form of lumps, pellets, or fines) to iron by a reducing gas …
Most gas-based direct reduction plants are part of integrated steel mini-mills, located adjacent to the electric arc furnace (EAF) steel plant. DRI can be either hot or cold charged to the EAF. Some steel companies ship DRI from their captive direct reduction plants to their remote steel mills and a small volume of DRI is sold to third parties.
The process operates continuously and only requires a periodical inspection and cleaning of some internal components to ensure optimum efficiency and performance. Dry Scrubbing Catalyst (DSC) Process. The DSC process is based on the property of iron sponge to convert to iron pyrite in the presence of hydrogen sulfide.
processes are divided into gas-based and coal-based methods. In a standard gas-based DR, the reaction takes place in a shaft furn ace. Iron ore is charged from the top, the reaction gases enter the shaft from the lower part and move upward. The main gas used in DR proce sses is reformed natural gas. The interests in using synthetic gas (syngas ...
Direct-reduced iron (DRI), also called sponge iron is produced from direct reduction of iron (in the form of lump, pellets or fines) by a reducing gases produced from natural gas or coal. This reduction takes place in the temperature range 800- 1050 degrees C when reducing gases; mainly Hydrogen and Carbon-monoxide; react with the iron oxides ...
The process of sponge iron making aims to remove the oxygen from iron ore. The quality of sponge iron is primarily ascertained by the percentage of metallization (removal of oxygen), which is the ratio of metallic iron to the total iron present in the product. Sponge iron manufacture is highly sensitive to raw material characteristics.
Jan 17, 2017· we are trying to take a look at the sponge iron industrie, how we making sponge iron by coal based .if you like please subscribe and comment,please comment your opinion .
Jul 15, 2015· Direct reduced iron final.ppt 1. International Corporation 2. History Established as Corporation (1967) Became member company of POSCO Group (2010) Major Business International Trading Project Organizing Natural Resource Development Manufacturing : Textile, Cement, Steel Processing etc Global Network Total : 95 - Asia 46, Middle East 7, Africa 12, Europe 9 CIS 8, …
Unlike the iron sponge process, the SulfaTreat material is non-pyrophoric and has a higher capacity than iron sponge on a volumetric or mass basis. In the process, the inlet gas stream enters the unit through a small inlet separator to separate out any entrained liquid, salt water, and any liquid hydrocarbon in the gas stream.
The COREX process is a two-stage process, as is shown in Figure 1.1.40.In the first step, iron ore is reduced to sponge iron in a shaft furnace by means of reducing gas. In the second step, the reduced iron is melted in the melter–gasifier vessel.
With such dimension of notion WE in our Sponge Iron Manufacturing process through 4 Kilns (1 * 350T and 3 * 500T) laid up the best DRI making process in India. It is Coal Fuel based DRI. Coal based Sponge-iron is a metallic product produced through direct reduction of iron ore in the solid state .As such it is also known as Direct Reduced Iron ...
Direct Reduced Iron (DRI) Production Plant NIPPON STEEL ENGINEERING CO., LTD. Basic Concept or Summary S-16 u A direct reduced iron (DRI) production plant is a shaft reduction furnace to produce DRI with large metal iron content by directly reducing iron ore (or iron …
Natural gas is reformed to enrich with 112 and Co mixture and this enriched and reformed gas mixture is preheated in gas-based process. A vertical retort is used for the reduction of iron ore as against a rotary kiln in coal based sponge iron process.
Nov 05, 2015· Midrex is an innovative ironmaking process, developed for the production of direct-reduced iron (DRI) from iron ores and primarily natural gas.
Sponge Iron | Download Brochure The company has the world's largest coal-based sponge iron manufacturing facility at Raigarh, Chhattisgarh and stands out as the market leader in coal-based sponge iron industry within India.
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