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In the iron ore pelletizing, the sintering of the pellets takes place in a rotary kiln which is lined with refractory bricks. During the process, deposited materials such as iron ore slag ...


Process flexibility Pelletization process 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 …


Pelletising. Directing heated and cooled air where it is needed and recycling heat to save energy. Whether using the straight grate process or adding a rotary kiln to make the grate-kiln process, our products are key to the process. To dry and heat the ore pellets, a number of fans are used to recycle heat from the kiln.


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 ...


leaving the rotary kiln and prehardened to a compressive strength of at least 10 kgf/pellet. This strength is necessary for subsequent treat-ment in the rotary kiln. Experience with different raw materials In the past, a number of different ores and fuels have been tested for their amenability to treatment by the KRUPP Sponge Iron Process.


Apr 01, 2013· References : Cross M, Young R W. Mathematical Model of Rotary Kilns Used in the Production of Iron Ore Pellets [J]. Ironmaking and Steelmaking, 1976, 3(3): 129. Gorog J P, Adams T N, Brimacombe J K. Heat Transfer From Flames in a Rotary Kiln [ J]. Metallurgical Transactions, QIU Xia-tao, HAN Xiao-liang.


Iron ore pellets play an important role in the raw materials for ironmaking [2]. In China, the grate-rotary kiln process is widely adopted to produce iron ore pellets [3]. However, deposits are ...


Feb 14, 2017· The main raw materials for the production of DRI by the rotary kiln process are (i) sized graded iron ore or iron ore pellets, (ii) non-coking coal, and (iii) dolomite in small quantities to scavenge the sulphur. Iron ore of the right quality is the basic input for the coal based direct reduction process.


The Midrex® and Energiron gas-based processes use predominantly iron ore pellets as feedstock, but sometimes with inclusion of lump ore in the furnace charge. The Finmet / Finored gas-based process utilizes iron ore fines as feedstock. The SLRN coal-based rotary kiln process uses lump ore and, increasingly, pellets as feedstock.


The final induration of the pellet is accomplished in a rotary kiln, wherein the principal heat transfer mechanism is radiation from the system's main burner. The process system is designed so that material transfer from the grate to the kiln occurs when the material on the grate is sufficiently preheated to have the requisite indurate strength ...


Iron Pellets are used as raw material for sponge iron and blast furnace. Shyam Metalics can produce various grades/quality of pellet because of having rotary kiln where the pellets are heated and fired uniformly. The process can use multiple ores simultaneously by applying the art of raw material blending.


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ROTARY KILN on Vimeo

A Rotary kiln is a pyroprocessing device used to raise materials to a high temperature (calcination) in a continuous process. Materials produced using rotary kilns include: Cement Lime Refractories Metakaolin Titanium dioxide Alumina Vermiculite Iron ore pellets. The Lithium ore from the mine is fed directly to the processing plant – or ...


Grate Kiln process is unique process designed to evenly indurate pellets to increase its mechanical properties. This process employ a conventional 'Straight Grate' followed by a 'Rotary Kiln' designed to churn the pellets & thus increase even heating as well to …


Rotary kiln process for iron ore oxide pellet production is hard to detect and control. Construction of one-dimensional model of temperature field in rotary kiln was described. And the results lay a solid foundation for online control. Establishment of kiln process control expert system was presented, with maximum temperature of pellet and gas ...


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Rotary kiln - Wikipedia

A rotary kiln is a pyroprocessing device used to raise materials to a high temperature (calcination) in a continuous process.Materials produced using rotary kilns include: Cement; Lime; Refractories; Metakaolin; Titanium dioxide; Alumina; Vermiculite; Iron ore pellets; They are also used for roasting a wide variety of sulfide ores prior to metal extraction. In Process …


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rotary kiln iron ore

Simulation of the flow field in an iron ore pelletizing kiln. Aug 01, 2016 The flow field in a rotary kiln, used in an iron ore pelletizing process, was investigated using a three-dimensional computational fluid dynamics model. The model is isothermal, downscaled and simplified.


The reduction process is carried out in an inclined horizontal rotary kiln, which rotates at a programmed speed.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 800–1200 C. Iron oxide is charged ...


Iron Ore Pellet Plant Animations. Grate-Kiln System Reference Plant This was the first iron ore pelletizing plant installed for Wuhan Iron amp Steel Company Equipment Specifications Traveling Grate 5664 mm x 69500 mm Rotary Kiln 6858 mm diameter x 45720 mm long Annular Cooler 21945 mm x 3657 mm Plant Commissioning March 2006 Iron Ore Feed Material.


grade iron ore availability. To meet ever increasing demand for iron ore with growth in Steel i.e. 110 million tones by 2020 Improved productivity and efficiency of the rotary kiln & Blast Furnace with superior reducibility behaviour of pellets compared to lump ore. 7


Jan 01, 2018· 2.1. Coal ash, iron-ore pellet powder and mixed powder. In drying and preheating processes of pellet production, pellet powder formed from broken pellets is brought into rotary kiln with the unbroken pellets and then meets with …


The deposit-forming problem is one of the main bottlenecks restricting the yield and production benefit of iron ore pellets produced by coal-fired rotary kilns. In order to implement measures to ensure the efficient production of pellets by coal-fired rotary kilns, the mechanism and influencing factors on the deposit formation were reviewed. The pellet powder and coal ash …


The NOx reduction in the iron ore pelletizing process becomes an important environmental concern owing to its role in the formation of photochemical smog and acid rain. Thus, it is essential to develop new technologies for reducing NOx emissions in order to contribute to the cleaner production of pellets. In this paper, NOx reduction by advanced reburning ingrate …


Jun 15, 2018 In China, the grate-rotary kiln process is widely adopted to produce iron ore pellets [ 3 ]. However, deposits are frequently found on grate wall, kiln and other high-temperature device parts, which decline pellets quality, reduce production efficiency and increase production cost [ 4, 5 ]. get price


Given the significant impact a rotary kiln burner has on the costs and revenues of iron ore pelletizing, that burner had better do its job well. The capital cost of combustion equipment is negligible in comparison to the capital cost of the plant. Yet, combustion performance is a major determinant of the pellet quality and


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Rikard Edland - Chalmers

The production of iron ore pellets, which is vital to the production of steel, is expected to be an important industry for many years to come. The pelletizing of iron ore is often performed in the 'Grate-Kiln' process, in which the iron ore is heated, first on a …


How Iron Ore Pelletizing Has Recently Gained New Kiln. Given the significant impact a rotary kiln burner has on the costs and revenues of iron ore pelletizing, that burner had better do its job well. The capital cost of combustion equipment …


2,177 iron ore rotary kiln products are offered for sale by suppliers on Alibaba.com, of which cement making machinery accounts for 34%, industrial furnace accounts for 1%. A wide variety of iron ore rotary kiln options are available to you, such as 3 years, 2 years, and 1 year.


Jun 03, 2012· Rotary kiln process for iron ore oxide pellet production is hard to detect and control. Construction of one-dimensional model of temperature field in rotary kiln was described. And the results lay a solid foundation for online control. Establishment of kiln process control expert system was presented, with maximum temperature of pellet and gas temperature at …


reduced iron ore pellets have been produced by a method which combines the use of internal and external solid reductants, and is carried out in conjuction with a grate kiln process. green pellets which are globules of fine ground ore, binders, and internally applied solid reductants, are pelletized. these pellets are preheated and hardened on a travelling grate using waste gases …


Jan 20, 2013· rotary kiln iron ore pellet process | Solution for Mining Quarry. three dimensional flow chart of iron pellet plant grate kiln tech …Grate-Kiln Process – Iron Ore Pelletising Jul 10, 2007 …Allis Chalmers subsequently developed … »More detailed


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Rotary Kiln – IspatGuru

Dec 26, 2019· Other applications – Other applications of the rotary kiln include (i) oxidation of ilmenite, (ii) calcination of iron ore pellets after preliminary heat treatment on a traveling grate, (iii) calcination of petroleum coke, (iv) reduction of heavy spar, (v) processing of gypsum to sulphuric acid and cement (gypsum – sulphuric acid process ...


-Pelletizing Process can produce superior and various quality pellets because of application of rotary kiln where pellets are heated and fired unifomly, know-how of plant operation & quality control, and advanced process control system. And the process can use various iron ores such as magnetite ore, hematite ore, dry or wet material.