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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 C. Iron oxide is charged into shaft furnace, rotary kiln, or fluidized beds in the form of pellet, iron ore lumps, or fines.
In the Direct Reduced Iron DRI plant, production of sponge iron using a solid reductant involves reducing iron ore lumpspellets with a carbonaceous material such as coal. The reduction is carried out in a rotary kiln which is inclined and rotates at a pre-determined range of speeds at a stipulated temperature 850 C -1,500 C.
The Rotary Kiln process is a well-established process for production of coal based sponge iron. Rotary kiln of certain dia and length is provided for reduction of Iron Ore into sponge iron using non-coking coal as reductant and Dolomite as sulphur scavenger however the Diameter and Length are to be designed based on the Plant Capacities.
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.
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.
is seen that the growth of sponge iron industry in last few years is unremarkable and today India is the largest producer of sponge iron as it covers 16 of global output. According to Sponge Iron Manufacturers Association 1, India has produced around 23 million tonnes of sponge iron in the nancial year of 20092010. Sponge
Sponge iron production in rotary kiln krupp sponge iron process the krupp sponge iron process uses a rotary kiln for the reduction of high grade lump ores or pellets fig the feed is introduced together with reducing and desulphurizing agents limestone or raw dolomite into an inclined rotary kiln heated counter current to the flow of hot gas .
Sponge Iron In Rotary Kiln Process Com Manufacturer Of. Accretion Control in Sponge Iron Production Kiln u 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 reduction process is carried out in an inclined horizontal rotary kiln
Jan 01, 2010 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.
production sponge iron through tunnel kiln process Sponge iron production by tunnel kiln method was developed from 1911 as H gan s method in Sweden After many modifications now this process is a sufficient and effective method for sponge iron production PDF Production of Sponge Iron through Tunnel Kiln Process Get Price. Online Chat
Jul 29, 2010 In general the gangue content in sponge iron varies from 4 to 8 . Carbon content The carbon content in sponge iron produced by coal based rotay kiln processes are generally low and is in the range og 0.08 to 0.20.The carbon content in gas based processes can be controllrd to a level of 1.5 to 2.0 based on requirement for steel making.
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 proportions, along with some dolomite. Coal serves as a reductant as well as fuel for providing heat to maintain the requisite temperature inside the kiln at 950-1050 C.
These are the measures that have helped the company move at faster growth rate with significant reduction in the cost of production. Being an integrated Steel and Power Company, the company has used the high quality Sponge Iron produced in the Sponge Iron Kilns for its internal consumption in its own steel plant.
Production of sponge iron Download PDF Info ... Prior art keywords kiln charge temperature iron sponge iron Prior art date 1930-06-30 Legal status The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.
The present work identifies the basic features of burden movement in a rotary kiln. The cold model study was conducted with iron ore as the feed material to determine the influence of length to diameter ratio LD of a rotary kiln on the filling degree, hold-up, and residence time of the charge. An empirical equation correlating different operating variables has been derived on the
Jun 30, 2011 The increase in the demand of sponge iron is also due to the fact that it is used as a substitute for coking coal which is available in scarcity in the world. 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 ...
Mar 16, 2013 Fig 2 Principle of direct reduction process. Gas based process. In the gas based reduction processes, a vertical shaft kiln is used in which iron ore is fed into the top of the kiln and finished sponge iron is drawn off from the bottom after cooling it
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.
2. ED, SIMA requested the participants to volunteer to spare their rotary kiln for carrying out the RampD for exploring the use of Syn Gas in the rotary kiln. Mr. T Srinivasa Rao, MD, Balajiswamy Premium Steels Pvt Ltd offered his 50TPD kiln for this purpose. 3. Presentation from Tata Sponge Iron Ltd was very much liked and lot of the people showed
Sep 01, 2015 The kiln data were taken at production of sponge iron of capacity 453.875 td. The length of the kiln is 80 m and its internal and external diameters are 4.55 m and 5 m, respectively. Temperature of the solids inside the kiln is maintained at 1020 C.
products 1-2. In the year 1908 use of tunnel kiln started for iron oxide reduction. This process was invented by E.Sieurin as Hoganas process 3. In 1954, more kilns came in operation in SWEDEN and USA. Presently it is more popular in China for sponge iron production from beneficiated iron ore fines cakes.
Sponge iron production process discussed herein are selected from known methods of which the references are available and referable. ... 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 ...
Data-1 includes temperatures profiles and air inlet at positions, AT-1 to AT-3 and MF-1 and MF-2, inside the kiln whereas, flow rates of iron ore, feed coal, slinger coal and sponge iron is ...
Alibaba.com offers 1,163 spong iron rotary kiln products. A wide variety of spong iron rotary kiln options are available to you, such as key selling points, local service location, and condition.
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 production can be classified into-
Sponge iron kilns transmission equipment Sponge iron kiln is equipped with the single or dual transmission. DC motor or variable frequency speed control motor controls the rotating speed. It makes the sponge iron kiln has the characters of stable work, energy-saving and efficient.
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 non-coking coal Patra et al, 2005. The ...
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