The Making of Iron & Steel
The BOS process uses pure oxygen, injected by a lance, for refining the relatively impure hot metal (and scrap is used for temperature control). The electric arc furnace uses primarily electrical energy to supply heat to melt scrap steel, sponge iron, or mixtures of scrap and other iron units. Compared to the BOS process, the EAF requires
Direct Reduced Iron Industry in India — Problems and …
`the quality requirements for the rotary kiln sponge iron process. The sponge iron fines generation is high and ranges from 15 — 30% depending upon the ore used due to high reduction degradation. This will not only reduce the sales realization of the product but also will lead to accretion formation in the kiln shortening the campaign life.
SPONGE IRON – Lloyd's Metals
Process. Sponge iron making is a process in which iron ore lumps (typically 5mm-18mm size) are tumbled with a 'select' grade of iron-coking coal little dolomite inside an inclined rotary kiln and control combusted in the presence of air for about 12 hours before the products are air cooled, magnetically separated, screened and size wise in ...
Method and apparatus for manufacturing sponge iron - SKF ...
The gas leaving the sulphur filter 15 is at a temperature substantially in excess of that required for the sponge iron process and the temperature is therefore lowered by mixing in a suitable portion of the cold, washed gas in the flow portion 10 to yield a temperature suitable for the process--e.g. 750°-1000° C., preferably 825° C.
BILLET MANUFACTURING PROCESS FLOW CHART Sponge …
BILLET MANUFACTURING PROCESS FLOW CHART Sponge Iron Stock Yard SUNVIK@ Heavy Melting Scraps Stock Yard Quality Control Confirmation on it's grade Quality report to Melting/ Production Incharges Final Product (Billets) Final product reconfirmed and colour coded with paint as per grade Stocking the Billets as per Grade Despatched for the conversion
Sponge Iron - an overview | ScienceDirect Topics
DRI, also known as sponge iron, is the product of reducing iron oxide in the form of iron ore and steel plant wastes into metallic iron, below the melting point of iron and typically in the range of 800–1200 °C. Iron oxide is charged into shaft furnace, rotary kiln, or fluidized beds in the form of pellet, iron ore lumps, or fines. The reduction takes place using gaseous reductants (CO + H ...
Sponge Iron (DRI) | The Hira Group
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 ...
SPONGE IRON UNIT - SEIL
Steel Exchange India Limited is having a Sponge Iron manufacturing unit in technical collaboration with world renowned M/s Mannesmann Demag of Germany (CODIR Process). With an installed capacity of 2x350TPD and can able to produce Sponge Iron of 0.225 Million Tons per Annum. 1.
Sponge Iron Manufacturer India
The Sponge Iron Manufacturers Association (SIMA) established in 1992 is an all India apex body of Indian sponge iron industry. It is the voice of the indian iron ore based sponge iron & steel industry, at both domestic and global forums. As a not-for-profit society, SIMA has been mandated to communicate the viewpoints of its constituents & al ...
Sponge Iron Industry: An Analysis
Sponge iron, also known as Direct Reduced Iron (DRI), is a product that is produced by subjecting iron ore to a reduction process. Di- rect-reduced iron has a slightly higher iron content, which often makes it better suited for use in the electric furnace route of steel mak-
US3212876A - Method for the production of iron powder from ...
US3212876A US275794A US27579463A US3212876A US 3212876 A US3212876 A US 3212876A US 275794 A US275794 A US 275794A US 27579463 A US27579463 A US 27579463A US 3212876 A US3212876 A US 3212876A Authority US United States Prior art keywords powder iron production sponge iron powder Prior art date Legal status (The legal status is an assumption and is …
Sponge iron making process - SlideShare
Sponge iron making process 1. ALBERTUS SEPTYANTOKO 2712100014 2. IRON ORE • Iron = 65-67 % • SiO2 + Al2O3 = 2-3 % • CaO + MgO = 0,5-1 % • Sulphur = 0,02 % max • Phosphorus = 0,04 % max Chemical Composition • Size = 5-18 mm • Shatter Index = +95 % • Tumbler index = +88 % • Reducibility Index = +94 % • Thermal Degradation Index = 5 % Physical Composition
Iron Sponge Process - an overview | ScienceDirect Topics
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).
Direct reduced iron - Wikipedia
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) into iron by a reducing gas or elemental carbon produced from natural gas or coal.Many ores are suitable for direct reduction. Direct reduction refers to solid-state processes which reduce iron oxides to metallic iron at temperatures below the melting ...
The Singareni Collieries Company Limited (A Government ...
Date: December 26, 2016 The Singareni Collieries Company Limited (A Government Company) Auction of Coal Linkage for Non-Regulated Sector – Tranche II List of Frequently Asked Questions – Cement, CPP and Sponge Iron sub-sectors S.
Direct Reduced Iron (DRI) Production Plant
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 ore pellets) with reducing gases.
Sponge Iron | Manufacturer of Sponge Iron
Sponge iron is also referred to as direct reduced iron, metalized iron, or hot briquetted iron. Sponge iron is used in the iron and steel industry as a substitute for scrap in induction and electrical arc furnaces. Over the years, the shortage of expensive melting scrap has made sponge iron a significant raw material for manufacturing high ...
IS 15774 (2007): Sponge Iron/Directed Reduced Iron (DRI ...
present in sponge iron/DRI, HBI and cold briquettes. 3.6 Residual Iron Oxides — These are remaining oxides of iron present in sponge iron either in the form of FeO, Fe~Od or Fe20~, though normally FeO would be the only residual oxides present. 3.7 Total Carbon — It is the total carbon present in sponge iron, and is equal to the sum of free and
Energy Audit Methodology of Sponge Iron Manufacturing ...
sponge iron manufacturing process or kiln operation with a view to finding out major energy sav-ing potential of the unit. In the research work we find that it is the incomplete reaction of coal that causes the major energy inefficiency in the process. Substantial amount of un-reacted carbon
Sponge Iron | Iron | Steelmaking - Scribd
Sponge iron is the product created when iron ore is reduced to metallic iron, in the presence of coal, at temperatures below the melting point of iron. The external shape of the ore is retained with 30% reduction in weight due to oxide reduction resulting in change in …
Energy Audit Methodology of Sponge Iron Manufacturing ...
Conducting complete energy audit (both process and utility) of a sponge iron unit is challenging as there is no laid down procedure to audit the process side. Further, the average heat to power ratio (kWth/kWe) of sponge iron plants ranges from (25:1) to (31:1). This shows that the manufacturing process mostly uses thermal energy and application of electrical energy is insignificant.
CHARACTERISTICS OF IRON AND STEEL POWDERS
Properties of three sponge-iron grades – NC100.24, SC100.26, MH80.23, and of two water-atomized iron powder grades – ASC100.29, ABC100.30, are presented in the diagrams at Figs. 3.2 and 3.3 and in Table 3.1. Table 3.1 Properties of some Höganäs Iron Powders Powder grade Approx. particle size range µ m Apparent density g/cm 3 Flow s/50g H ...
sponge iron process
In general sized iron ore of 5-18mm is used in the process of manufacture of sponge iron on all types of rotary kiln with +16mm not exceeding 15-20%.The mean particle size of iron ore shall be restricted to 11mm in order to achieve uniform Fe metallic of all grain size fraction of the product.
A Thesis On PREPARATION AND CHARACTERIZATION OF …
1.2 Development of DRI process And IS Values of Sponge Iron 5 1.2.1 Coal-based Process 5 1.2.2 Gas-based Process 7 1.3 Direct Reduced Iron 9 1.3.1 Type of DRI Processes 10 1.4 Sponge Iron 11 1.4.1 Concept of Sponge Iron 11 1.4.2 Kinetics of Iron Ore Reduction 13 1.4.3 The Reduction Mechanism for Porous Iron Ores 14
THE OPTIMUM METHOD FOR CONVERTING SPONGE IRON …
about 30 to 40% of sponge iron. These agglomerates can only be removed by time-consuming measures such as oxygen lancing or overheating of the bath. The so-called Iceberg process (process technique No. 2) developed by IRSID is characterized by the continuous charging of sponge iron onto an unmolten sponge iron heap. The feed rate is regulated ...
(PDF) Operation of Coal-Based Sponge Iron Rotary Kiln to ...
Sponge iron is a type of iron produced by coal based or gas-based reduction of iron ore. It is difficult to measure and control the degree of reduction or quality of the iron ore at intermediate ...
DESIGN OF WASTE HEAT RECOVERY SYSTEM IN A …
in the sponge iron process. For this purpose a case study of typical sponge iron production process is considered. The waste gas from a sponge iron plant exits at a temperature of around 200-300 C. A lot of sensible heat is lost with these gases. This heat is utilized to preheat the air entering to kiln. ...
TATA
Manufacturing assets comprise machines, instruments and production equipment. The manufacturing technology helps convert and process raw materials to produce the end product (sponge iron). NATURAL RESOURCES Raw materials are extracted from natural resources; our production process depends on natural resources such as water.
High Quality TMT Bar Manufacturing Process | Shyam Steel
Scope: The process covers inspection, testing, identification and traceability of the product from receipt stage, in-process inspection and final inspection till dispatch. Procedure: Direct Reduced Iron Unit (D.R.I.): The sized iron-ore is tested for its Fe content and …
OPERATIONAL ASPECTS OF SPONGE IRON PRODUCTION IN …
1. Krupp Sponge Iron Process The Krupp. Sponge iron process uses a rotary kiln for the reduction of high grade lump ores or pellets (Fig. 1). The feed is introduced together with reducing and de-sulphurizing agents (lime-stone or raw dolomite) into an inclined rotary kiln, heated counter current to the flow of hot gas and reduced to form sponge ...