advantages of limestone in sponge iron process

Direct reduction a review of commercial processes

----- FIGURES Number Page 1 Growth in production of Direct Reduction sponge iron 2 2 Types of Direct Reduction processes 11 3 Feed material size distribution 14 4 Midrex standard flowsheet 17 5 The HyL process 21 6 The SL/RN process 29 TABLES Number Page 1 Regional Distribution of Direct Reduction Plants 3 2 Annual Capacity of Direct Reduction Plants 1977 1980 1985 5 3 Sponge Iron...

Direct reduced iron process

Direct reduced iron DRI process In addition to the process route via the blast furnace process there is another option for extracting crude steel from iron ores using the so-called direct reduced iron DRI process secondary route The starting point for the efforts to find an alternative to the blast furnace process was the relatively high process expenditure...

EXTRACTION OF IRON

The process of the extraction of iron is carried out by the following steps Concentration of ore Calcination or Roasting of ore Reduction of ore Concentration of ore In this metallurgical operation the ore is concentrated by removing impurities like soil etc The process...

PDF i Direct Reduced Iron Production

This product is known as direct reduced iron DRI or sponge iron Processes that produce iron by reduction of iron ore in solid state below the melting point are generally classified as DR...

OPERATIONAL ASPECTS OF SPONGE IRON PRODUCTION

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...

Ironmaking Process

Apr 04 2012 0183 32 The ironmaking process in the blast furnace is a heat and mass transfer process and the furnace can be divided into different zones according to physical and chemical state of the feed and temperature Figure 115 illustrates various zones of the blast furnace and feed distribution and materials flow 13 Corresponding to each temperature interval typical reactions will take place...

Convert your sponge iron plant into a cast iron plant and

In the process iron ore fines limestone are pre-heated by the off-gases of the smelting chamber in a rotary kiln to temperatures of 900-1 000 176 C then hot-charged into the MAGMA chamber Coal is directly burnt in oxygen inside MAGMA Advantages of converting a sponge iron plant into a pig iron...

Direct Reduction Process

The sponge iron formed in the direct reduction process is then melted in an electric arc furnace In these processes the iron oxides in the ore are reduced to metallic iron In the next step the raw iron is usually dropped into a torpedo ladle car where reagent is added to purify the iron from sulfur...

The Solvay Process Process Products Environmental

Jan 20 2020 0183 32 The Solvay process is an industrial process that uses limestone CaCO 3 to produce carbon dioxide CO 2 which reacts with ammonia NH 3...

Corex Process in Iron Making

Dec 02 2009 0183 32 Corex Process in Iron Making Iron ore pellets and additives limestone and dolomite are continuously charged into the reduction shaft via lock hopper system located on the top of the shaft is reduced by gases emanating from the second unit to make hot sponge iron first stage This is mechanically transferred to the second unit or...

HYL Direct Reduction Technology Adaptations for the

3 HYL Direct Reduction Process HYL is a process designed for the direct reduction of iron ores by use of reducing H2 and CO gas As presented in Figure 1 above there are three process schemes available for producing DRI Cold DRI discharge is commonly used in...

SPONGE IRON PLANT

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...

Difference Between Sponge Iron and Pig Iron Compare the

Apr 30 2011 0183 32 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 pressur Sponge iron and pig iron are different forms of iron that we can produce from iron ores that occurs naturally under the surface of...

What is HBI

Hot Briquetted Iron HBI is a product produced by the hot sponge iron briquetting HDRI process at temperatures above 650 176 CThis type of briquette is the best-known product for easy and safe transportation of sponge iron worldwide Iron and steel industry is one of the industries that utilize briquetting technology such as coal briquetting coke briquetting and sponge iron briquetting...

US2855290A

US2855290A US597507A US59750756A US2855290A US 2855290 A US2855290 A US 2855290A US 597507 A US597507 A US 597507A US 59750756 A US59750756 A US 59750756A US 2855290 A US2855290 A US 2855290A Authority US United States Prior art keywords pellets iron limestone reducing reduction Prior art date 1956-04-04 Legal status The legal status is an assumption and is...

manufacturing process of sponge iron seminar ppt

Sponge Iron Industry - SlideShare 17/11/2012 Input Output In DRI Plants per tonne of DRIMatter Input OutputSolids Iron Ore 6-20 mm 1500 kg Sponge Iron 3 mm 790 kg Coal 0-3 mm 300 kg Sponge Iron 1-3 mm 210 kgs Coal 3-15 mm 700 kg Sponge Iron -1 mm 50 kg Limestone 0-3 mm 75 kg Char 3mm 30 kg Char 1-3mm 75 kg Char -1mm 195 kgAir 6000 Nm3 5000 Nm3Energy in Gcal Coal = 6...

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...

Energy survey of the coal based sponge iron industry

Sep 01 2015 0183 32 The actual process of the coal based sponge iron production is based on SL/RN 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 oreThis process is adopted by worldwide conventional sponge iron industri...

is limestone used in the production of sponge iron

advantages of limestone in sponge iron process the structure of the iron amp steel industry in malaysia figure crude steel production in europe and worldwide balance of costs and advantages inherent within the definition of bat such as limestone and reducing agents coke are continuously fed from the sponge iron and finally molten pig iron...

Sponge Iron Production Process

This process is one of the oldest direct reduction methods and the idea of its structure is based on a horizontal cement kiln In this method heat coal as a reducing agent is mixed with iron ore and sponge iron is produced in a horizontal furnace...

Production Sponge Iron Through Tunnel Kiln Process

Sponge Iron Production Process Arij Trading Market share About 23 of sponge iron total production 4 Tunnel furnace process This process is the oldest direct reduction method In this method Thermal coal is mixed with iron ore as a reducing agent Natural gas generates the required reduction temperature and reduction is performed on Silicon Carbide SiC Crucibles in a tunnel furnace...

Iron Sponge Process

James G Speight PhD DSc in Natural Gas Second Edition 2019 851 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...

sponge ironpptx Iron Steelmaking

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...

advantages of limestone in sponge iron process

advantages of limestone in sponge iron process Advantages Of Limestone In Sponge Iron Process Applications of electrostatics how does a electrostatic precipitator use static electrostatic precipitators use electric forces to is limestone used in the production of sponge iron tunnel kiln for sponge iron production is there an advantage in producing sponge iron over sponge iron...

Direct reduced iron

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 Direct reduction refers to solid-state processes which reduce iron oxides to metallic iron at temperatures below the melting...

Creating Iron HowStuffWorks

173 The more advanced way to smelt iron is in a blast furnace A blast furnace is charged with iron ore charcoal or coke coke is charcoal made from coal and limestone CaCO 3 173 Huge quantities of air blast in at the bottom of the furnace and the calcium in the limestone combines with the silicates to form slag...

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