Solid reduction process. Sponge iron is a highly processed form of iron ore which contains metallic iron in the range of 83-88 obtained by direct reduction without melting it. Due to high porosity, the resulting iron is called sponge iron. It is used as a raw material for manufacturing steel through electrical arc furnace and the induction ...
sponge iron, so named because the removal of oxygen from iron ore without melting leaves a honeycomb microstructure that resembles a sponge. The sponge iron was made by putting charcoal and iron ore in a shallow hearth, in which intense heat was built up
Direct-reduced 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. The reducing gas is a mixture majority of hydrogen H2 and carbon monoxide CO which acts as reducing agent. This process of directly reducing the iron ...
We claim 1. A process for producing sponge iron, comprising the steps of preparing a sinter mix including iron ore and sponge iron, sintering the sinter mix by utilizing for at least part of the heat required for sintering the heat liberated by burning of the sponge iron in said mix, changing the product of the step of sintering into sponge iron, separating the minus 3 millimeter size fraction ...
Sep 01, 2015 The actual process of the coal based sponge iron production is based on SLRN process jointly developed by the Steel Company of Canada, Lurgi Chemie, Republic Steel Company and National Lead Corporation in 1964, which works on direct reduction of ore.This process is adopted by worldwide conventional sponge iron industries.
Iron Ore Sponge Iron Anthracite Coal Briquette Making . 13 Sep 2016, The sponge iron manufacturer in Delhi India offers DRI products tunnel kiln process sponge iron in south africa. Prices Quote Direct Reduced Iron Wikipedia
Nov 15, 2020 About 5 of global steel is produced from sponge iron DRI, and this trend is increasing. Through the direct reduction of iron ore, oxygen is expelled from the iron to make metallic iron. Sponge iron is an essential raw material for making iron and steel products, and it suitably replaces scrap and blast furnaces.
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.
Coal based sponge iron process Production of sponge iron by gas is the most common way of producing sponge iron in the world. However, in India as the largest producer of sponge iron, 70 of the product is produced by Coal based sponge iron process. How a sponge iron production process is used in a region or country depends on the abundance of ...
Apr 30, 2011 The key difference between sponge iron and pig iron is that we can produce sponge iron by direct reduction of iron ore through reducing agents whereas the production of pig iron is by melting iron ore with charcoal and limestone at very high pressures.. Sponge iron and pig iron are different forms of iron that we can produce from iron ores that occurs naturally under the surface of
2. Description of Sponge Iron Manufacturing Process. Most of the plants in India use DRI processa solid state direct reduction process by which iron ore is reduced to sponge without phase change . Raw material mix-iron ore, dolomite and coal are fed to one end of rotary Kiln and product sponge iron along with char is taken out from the other ...
Dec 02, 2009 The blast furnace concept has been used, virtually splitting it into two at the cohesive zone interface. Accordingly a Corex plant has shaft unit, where iron ore pellets with or without some closely sized lump ore is reduced by gases emanating from the second unit to make hot sponge iron
To purify and strengthen iron, materials like coke are mixed in with it to remove oxygen. To coax the oxygen atoms away from the ore requires heat and an alternate atomic partner for the oxygen to bond to. Carbon fills this role nicely, and is readily available in the form of everyday charcoal, or coke, a form of carbon made from coal.
Mar 08, 2021 Direct Reduced Iron DRI This iron production process directly reduces iron ore in solid-state with the reaction temperature below the melting point of iron. Reducing gases are produced from natural gas gas-based DRI or coal coal-based DRI called syngas, a mixture of H2 and CO.
Jun 23, 2021 StockholmSweden The Hybrit pilot plant in Lule , Sweden has completed test production of sponge iron and demonstrates that it is possible to use fossil-free 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 tons have been made so far.This is the first time ever that hydrogen made
Most of the plants in India use DRI processa solid state direct reduction process by which iron ore is reduced to sponge without phase change Figure 1. Raw material mix-iron ore, dolomite and coal are fed to one end of rotary Kiln and product sponge iron along with char is taken out from the other end. Apart from this, primary
Apr 10, 2021 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
May 17, 2017 The Comet process, developed by the Centre de Recherches Metallurgiques CRM, Belgium is a coal-based system that produces sponge iron from ore fines and limestone in a rotary hearth furnace. The Comet direct reduction process produces low gangue and low sulphur DRI from iron ore and coal fines.
Feb 14, 2017 The metallic iron in this process is produced by the reduction of iron oxide below the fusion temperature of iron ore 1535 deg C by utilizing carbonaceous material present in the non-coking coal. As the iron ore is in direct contact with the reducing agent throughout the reduction process, it is often termed as direct reduced iron DRI.
Direct reduced iron - Wikipedia, the free encyclopedia . Direct-reduced 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.The reducing gas is a mixture majority of hydrogen H 2 and carbon monoxide CO which acts as reducing agent. . This process of
Jun 21, 2021 As POWER has reported, test operations to make hydrogen-reduced sponge iron in the Lulea pilot plant began in August last year. They wrapped up on March 24. The process involved producing hydrogen ...
Mar 16, 2013 Direct reduced iron DRI is the product which is produced by the direct reduction of iron ore or other iron bearing materials in the solid state by using non-coking coal or natural gas. Processes which produce DRI by reduction of iron ore below the melting point of the iron are normally known as the direct reduction DR processes.
Jun 14, 2011 Difference Between Iron Ore and Iron. Iron, which is one of the most useful metallic elements, is not found independently but in the form of its oxides under the surface of the earth. These oxides are called iron ores and are found in many igneous rocks. Oxygen is removed from iron ores to make use of iron.
Ratio of coking coal and iron ore to make steel Products. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including, Ratio of coking coal and iron ore to make steel, quarry, aggregate, and different kinds of minerals.
Mar 15, 2013 Ore Process why we are use wash coal in sponge iron Print. why we are use wash coal in sponge iron. Posted atMarch 15, 2013 4.7 - 2206 Ratings why we are use wash coal in sponge iron Grinding Mill China. Direct reduced iron Wikipedia, the free encyclopedia Direct-reduced iron DRI, ...
The COREX process offers high smelting intensity and hence higher productivity, ability to use various types of non-coking coals, use of iron ore fines to an extent, low net operating cost, possible generation of power or other alternative use of export gas generated from
A mathematical model of the coal-based direct reduction process of iron ore in a pellet composed of coal and iron ore mixture is investigated using a finite-con. Read more Met Coal 101 - Grande Cache Coal
China Supplier of Sponge Iron Direct Reduced Iron Sponge iron is a metallic product produced through direct reduction of iron ore in the solid state. It is a substitute for scrap and is mainly used in making steel through the secondary route. The process of sponge iron making aims to remove the oxygen from iron ore.
Fe3O4 CO 3FeO CO2. FeO CO Fe CO2. We are manufacturing high-grade sponge iron that is consistent in its quality. The production process followed at Lloyd Metals and Energy Limited makes it unique and superior than its competitors.
Recently a variant of COREX process, FINEX, is codeveloped by VAI and Posco for the production of hot metal based on the direct use of iron ore fines and noncoking coal. Fine iron ore is charged into a series of fluidized-bed reactors together with fluxes. The iron ore fines pass in a downward direction through four reactors where they are heated and reduced to DRI by means of a reduction
Abstract Today India stands as the largest producer of coal based sponge iron through rotary kiln process using calibrated ore and non coking coal. However, Rotary kiln process suffers from serious limitations like low productivity and pollution. In this respect fixed bed Tunnel kiln furnace are evolving as an alternative to Rotary kiln process.
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 DRI. Iron Ore Pellet is used for reduction. After reduction of iron ore pellet the product resembles sponge because of pores left behind after removal of oxygen. As such it is called Sponge Iron. Sponge Iron is a substitute
The major Raw Materials required for production of Sponge Iron by the rotary kiln process are sized graded Iron Ore and Non-Coking coal. Limestone, in small quantities, is also required to scavenge the sulphur. IRON ORE The quality requirement of Sized ore for sponge iron
Sep 01, 2015 Reference temperature0 C. The actual process of the coal based sponge iron production is based on SLRN process jointly developed by the S teel Company of Canada, L urgi Chemie, R epublic Steel Company and National Lead Corporation in
Nov 09, 2014 ROTARY COOLER The product is conveyed to the product separation and storage building The product is Sponge iron and char Place that spraying a controlled amount of water directly into hot solids and by spraying additional water outside the cooler shell. 12. SCREENING 10 mm 3