The Paired Straight Hearth (PSH) furnace is a new coal-based reduction process for making metallized pellets for EAF or Smelting process The PSH process uses non-metallurgical coal as a reductant to convert iron oxides such as iron ore and steelmaking by-product oxides to DRI pellets In this process, a multi-layer, nominally 120 mm tall bed of composite “green balls” made from oxide .
the production process of the blast furnace, because even during a traditional process, performed by the introduction of coke and iron ores, the metal direct reduction takes place in the lowest part of the divergent section Just before the melting period, the blast furnace is interested by the presence of direct reduced iron and thus, the .
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 gas , The reduction in coal consumption in blast furnaces enables reduction in the repair cost of coke ovens
Overview Hot Briquetted Iron (HBI) is a premium form of DRI that has been compacted at a temperature greater than 650° C at time of compaction and has a density greater than 5,000 kilograms per cubic metre (5,000 kg/m 3) HBI was developed as a product in order to overcome the problems associated with shipping and handling of DRI - due to the process of compaction it is very much less .
Blast furnaces differ from bloomeries and reverberatory furnaces in that in a blast furnace, flue gas is in direct contact with the ore and iron, allowing carbon monoxide to diffuse into the ore and reduce the iron oxide to elemental iron mixed with carbon The blast furnaces operates as a countercurrent exchange process whereas a bloomery does .
Oct 20, 2015· The largest modern blast furnaces can produce 9,000 tons or more of iron per day And this iron is the best starting stock for large-volume steel production Blast furnace/BOF steel production is sort of like making a cake from scratch The quality tends to be better
YX Qin, Comparison of direct reduction by rotary hearth furnace-electric furnace smelting process and blast furnace process, Jiangsu Metall, 32(2004, No 2, 9 Google Scholar 
Blast furnaces force air into the bottom of the furnace into a heated stove area The heat from the blast furnace's stove area converts the forced air into heated air to melt metal Compare the feasibility of obtaining steel scrap for an electric arc furnace or iron ore and limestone for a blast furnace
Mar 03, 2008· Direct reduction of iron (DRI) – ‘Sponge iron’, another method of producing iron: All steelmaking processes require the input of iron bearing materials as process feedstock For making steel in a basic oxygen furnace, the iron bearing feed materials are usually blast furnace ,
BF - Blast Furnace SR – Smelting Reduction EAF – Electric Arc Furnace Scrap steel DRI – Direct Reduced Iron 3 THE USE OF HYDROGEN IN THE , Energy Usage for Ironmaking Comparison of Existing Reduction Methods Method Energy Usage Blast Furnace,
Pig Iron Production - Blast Furnace Route; , lower part of the blast furnace shaft - indirect reduction of the iron oxides by carbon monoxide and hydrogen occurs at 700-1,000°C Bosh area of the furnace where the burden starts to soften and melt - direct reduction of the iron [and other] oxides and carbonization by the coke occurs at 1,000 .
using direct reduced iron By comparison, Iran made only 225 million tons of blast furnace hot metal during 2016 2016 World DRI Production at 7276 Million Tons: US production was up by more than 700,000 tons over 2015 Five nations represent 71% of world DRI production
In the four countries investigated in this report, two types of steel production dominate: blast furnace/basic oxygen furnace (BF/BOF) and electric arc furnace (EAF) production BF/BOF production uses iron ore to produce steel The reduction of iron ore to iron in a BF is the most energy-intensive process within the steel industry
Iron processing - Iron processing - Iron making: The primary objective of iron making is to release iron from chemical combination with oxygen, and, since the blast furnace is much the most efficient process, it receives the most attention here Alternative methods known as direct reduction are used in over a score of countries, but less than 5 percent of iron is made this way
Blast furnace, a vertical shaft furnace that produces liquid metals by the reaction of a flow of air introduced under pressure into the bottom of the furnace with a mixture of metallic ore, coke, and flux fed into the top Blast furnaces are used to produce pig iron from iron ore for subsequent
Feb 08, 2010· EAFs can be rapidly started and stopped, allowing the steel mill to vary production according to demand Although steelmaking arc furnaces generally use scrap steel as their primary feedstock, if hot metal from a blast furnace or direct-reduced iron is available economically, these can also be used as furnace feed
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 , of sintering or pelletization plants, coke ovens, blast furnaces, and basic oxygen furnaces,
reduction in MIDREX direct reduction process Presented by Hidetoshi Tanaka Iron Unit Division KOBE STEEL, LTD , Potential for CO2 emissions reduction by using DRI/HBI (1) EAF Steelmaking Process (2) , half that for an equivalent blast furnace • Lower greenhouse gas emissions
reduced to direct reduced iron (DRI) by the reduction gas in counterflow Discharge screws convey the DRI into the melter gasifier, where final reduction and melting take place in addition to all other metallurgical reactions Hot metal and slag are tapped as in conventional blast furnace practice DIRECT AND EFFICIENT
FINEX® is based on the direct use of iron ore fines and non-coking coal and eliminates the coke-making and the sintering processes which are most critical to the conventional blast furnace process Combining two decisive advantages leads to lower production costs and essential reduction of environmental emissions in comparison with the .
New Ironmaking Processes: Relevance to India Dr B B Agrawal and A S Mathur R & D Centre for Iron & Steel , • More than 90% of world iron production is through Blast furnace technology route , – Direct Reduced Iron (DRI) has emerged as an
Cost Effectiveness Analysis of HYL and Midrex DRI Technologies for the Iron and Steel-Making Industry By , Another alternative to hot molten iron making is the direct reduction method In this method, iron is , metal can be obtained through the blast furnace or DRI, although the direct reduction ,
DRI direct reduced iron EAF electric arc furnaces EMS energy management systems EPA United States Environmental Protection Agency FeO iron oxide Ft feet ft 3 cubic , Coke is used in the blast furnace to provide a reducing atmosphere and is also a source of fuel Most coke in the United States (US) is produced in by-product recovery coke .
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 elemental carbon produced from natural gas or coalMany ores are suitable for direct reduction Reduced iron derives its name from the chemical change that iron ore undergoes when it is heated in a furnace at a high .
Oct 17, 2017· While the blast furnace remains an important tool for ironmaking, newer technologies such as smelting and direct iron reduction are available to produce iron with minimal byproduct generation and slag-free hot metal Smelting reduction and direct iron reduction can reduce energy input, lower greenhouse gas emissions and minimize slag byproduct generation, resulting in overall ,
Jan 14, 2019· The decrease of input C can be achieved by lowering the direct reduction ratio (an endothermic reaction) by strengthening gas reduction inside the BF through decarbonization and recirculation of top gas by injection into the furnace Typical flow sheet of blast furnace with top gas recycling (TGR) is shown in Fig 1
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 water vapour emitted from the top of the furnace Water vapour can be condensed and scrubbed before reuse in the plant
blast furnaces in Sweden, only pellets are used as iron laboratory testing, with the focus on reduction behaviour bearing materials If knowledge of the behaviour of diVerent To allow comparison, the operation of the experimental types of pellets with respect to the reduction of iron oxide blast furnace and some of the measurements made should
Direct Reduced Iron (DRI), also known as Sponge Iron, offers an alternative steel production route to BF-BOF and Scrap-EAF rout In DRI, iron ore is reduced in its solid state – unlike BF process where a liquid metal is formed during reduction DRI can then be transformed to steel in electric arc furnac DRI production is common in Middle East, South America, India and Mexico
A comparison of DQ-coke (dry quenched coke) with WQ-coke (wet quenched coke) for blast furnace operation was made The results were as follows: a decrease in coke moisture caused a sharp rise in the top gas temperature; a decrease in coke moisture fluctuation was confirmed, and it is estimated that .