Coal Based Rotary Kiln for Direct Reduced Iron Sponge Iron 100 TPD, 350 TPD, 500 TPD Solid state reduction of Iron Ore using either coalgas as a medium of reduction to produce a substitute raw material for steel making is termed as Direct Reduced Iron DRI. Since DRI is produced by removing oxygen from iron ore, its structure is just like sponge with a network of connecting pores.
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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 iron.
Because the induration of the pellets occur in the rotary kiln, the pellets produced in a grate-kilntm system are consistently of higher quality than those produced in a straight grate. the rotary kiln provides constant mixing of the pellets, bringing all the pellets to the same temperature.
The rotary kiln process is a well-established process for production of sponge iron. in this process a refractory lined rotary kiln is used for reduction of iron ore in solid state. the sie depends on the production capacity of kiln. the kiln is mounted with a slope
Mar 01 2017nbsp018332rotary kiln is the primary equipment in sponge iron industry which is used to reduce iron ore to metallic iron ie fe it is called sponge iron rotary kiln is widely used in cement and steel industries the production capacities of these industries depend significantly on the performance of rotary kiln. 60s manual response
Mar 01, 2017nbsp018332the geometry of rotary kiln of sponge iron process is developed using gambit 2.4.6. dimensions of kiln are 80 m length and 4 m internal diameter. the kiln is inclined to 2.5 degree to the horizontal and rotated with 4.3 rpm. bed material consists of iron ore, coal and dolomite, enters the kiln through feed end.
Introduction the rotary kiln process is a commonly practiced method in india for producing coal based sponge iron the iron ore along with coal is charged into the kiln and air tubes located along the length supply the air for combustion in the industry there have been many recent reports of premature failures of certain air tubes in a
Iron ore and non-coking coal are the prime raw materials for the production of sponge iron. these are charged into a rotary kiln in requisite proportion along with some dolomite. coal plays a dual role in the process by acting as a reductant as well as a fuel for providing heat to maintain the requisite temperature inside the kiln at 950-1050 o c. the reduction process occurs in solid state.
Sponge iron being magnetic gets attracted and gets separated from non- magnetic char. the iron ore and coal crushed and screened to respective sizes are fed to rotary kiln through feed tube in pre-determined ratio. the rotary kiln is slightly inclined at an angle 2.5 deg and rotated by
These plants use iron ore pellets in the rotary kiln. raw material mix consisting of iron ore, dolomite and non-coking coal is fed at the one end of the rotary kiln and is heated by coal burners to produce dri. the product dri along with char sometimes called dolo char is
Sponge iron is the product generated by direct reduction of iron ore with aid of either carbon or natural gas under controlled temperatures and pressures within a rotary kiln. however the performance of rotary kilns is usually adversely affected by the formation of accretion. this accumulation of sintered solid particles which form rings
Direct reduction iron production plant iron ore rotary kiln sponge iron , find complete details about direct reduction iron production plant iron ore rotary kiln sponge iron,iron production plant,iron ore rotary kiln,sponge iron from cement making machinery supplier or manufacturer-gongyi derui machinery co., ltd.
Sponge iron rotary kiln. specifications sponge iron is a kind of superior iron ore. it can be got by oxidation-reduction reaction. in sponge iron rotary kiln, vertical furnace and other reactor, iron ore and other iron ore concentrates are reduced in low temperature condition and
Sponge iron rotary kiln process. sponge iron composition manufacturing process lloy sponge iron making is a process in which iron ore lumps typically 5mm18mm size are tumbled with a selectgrade of ironcoking coal little dolomite inside an inclined rotary kiln and control busted in the presence of air for about 12 hours before the products are air cooled magnetically separated screened and size ...
Rotary kiln iron ore pellet process. a mathematical model of drying and preheating processes in a traveling grate was presented based on the laws of mass momentum heat transfer and drying semiempirical relations. . a dynamic mathematical model of the complete gratekiln iron-ore pellet induration process metall. trans. b 191988 no .
Iron ore, metallurgy chemical sponge iron rotary kiln for sponge iron production plant . introduction. 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.
2020-4-30350 tpd sponge iron kiln details. process making sponge iron rotary kiln aircondi. rotary kiln sponge iron, find complete details about rotary kiln sponge iron,rotary cement kiln is used for making of cement clinker and there are dry and wet rotary kiln is commonly used in the production process of catalytic agent, get price. live chat
Rotary kiln sponge iron plant pdf. in the present work a system is designed to integrate the heat of waste gas in the sponge iron process for this purpose a case study of typical sponge iron production process is considered waste gas from the rotary kiln of the sponge iron plant exits at a temperature around 900 c. 60s manual response
Rotary kiln for iron ore. our sponge iron rotary kiln simulator is a tool based on the rotary kiln process are sied graded iron ore and non. . akpoonia anil k. poonia and shabina khanam member iacsit simulation of rotary kiln used in sponge iron process using ann. . rotary kiln for iron .
Case studies from the iron and steel industry on model-based optimization of production of direct reduced iron in a rotary kiln and induration of wet iron ore pellets on a moving packed bed ...
Rotary kiln cement rotary kiln and sponge iron rotary kiln. rotary kiln is a rotating cylindrical vessel which is used for drying, calcination and sintering in a continuous process with the use of hot gases. the hot gases may be generated in an external furnace or by a flame inside the kiln. a study on the accretion formation in dri kilns and
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 8001200 176c 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 ...
Jan 30, 2011nbsp018332the process of reducing the iron ore in solid form by reducing gases is called direct reduction. this book deals with the basics of sponge iron production in rotary kiln, describing the operational problems and control needed to produce a quality product.
This book comprehensively deals with the production of sponge iron in the rotary kiln. the book is divided into 17 chapters. the initial chapters give a brief on the fundamental theories and basic principles of sponge iron production, commercially used dr direct reduction processes and physico-chemical principles of sponge iron production.
Rotary kiln process of making sponge iron chapter . 2 kiln based sponge iron production process rotary kilns are found in many processes that involve processing of solids this study focuses on sponge iron kiln based process the chemical process involved in making sponge iron removes oxygen from iron ore by using a reducing agent in the form of noncoking coal patra et al 2005 the.
Rotary kiln sponge iron in south africa cement plant rotary kiln equipment cost of tunnel kiln for sponge iron designing of an intelligent fuzzy logic systemdirect reduced iron by tunnel kiln kiln for spong sale in south africa pottery kiln for. heating of manganese ore in rotary kiln binq mining. brief process of coal based sponge iron rotary ...
Technologies that use this method for regeneration include kiln-based processes such as sl rn and rotary-based kiln-like processes such as festmet. the disadvantages of using high-quality coking coal, low start-up and maintenance costs, low operating temperature compared to long furnaces, and energy saving are some of the advantages of these ...
Modeling of rotary kiln in cement industry. a simple system for cement rotary kiln is shown in . rotary kfigure 1iln is basically a cylinder of length 50 - 120 m modern kilns and 3.5 to 6.5 feet in diameter. during kiln mainly on how long it takes until the temperature of the raw material clinker temperature of about 1370c is, it depends ...
Iron ore rotary kiln. rotary kiln - cement rotary kiln and sponge iron rotary kiln. our cement rotary kiln and sponge iron rotary kiln has been developed for performing drying calcination and sintering work in a continuous process. widely used for cement pet coke calcination sponge iron and other materials it uses hot gases for the operation.
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 8001200 176c. 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 ...
There are two main processes for producing iron ore pellets the grate-kiln system and the straight grate system. in the straight grate system, a continuous parade of grate cars moves at the same speed though the drying, induration and cooling zones. any change