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drying and preheating processes of iron ore pellets in a traveling grate

Drying and preheating processes of iron ore pellets in a ...

Oct 09, 2010 · 高达10%返现 · 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 field test was systematically carried out in a traveling grate. The effects of pellet diameter, moisture, grate velocity, and inlet gas temperature on the pellet bed temperature

Drying and preheating processes of iron ore pellets in a ...

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 field test was systematically carried out in a traveling grate. The effects of pellet diameter, moisture, grate velocity, and inlet gas temperature on the pellet bed temperature were studied. The average relative ...

Drying and preheating processes of iron ore pellets in a ...

Feng et al. [9] also developed a mathematical model for the drying and preheating phenomena of iron ore pellets in a traveling grate based on mass, momentum and heat transfer laws, and semi ...

drying and preheating processes of iron ore pellets in a ...

Jan 21, 2013 · Drying of Iron Ore Pellets – Analysis with CFD. optimizing the drying zone of a traveling grate pelletizing pellets move through a preheating D., KONG L., LIN Z. (1993) Drying process of iron ore pellets »More detailed

Drying of Iron Ore Pellets - Analysis with CFD

Pellets can be indurated in shaft furnaces, in grate-kilns and on traveling grates. The principle of sintering pellets is almost the same in grate-kilns and on traveling grates. The process starts with up- draught drying (UDD), followed by down- draught drying (DDD), a preheating

Cooling process of iron ore pellets in an annular cooler ...

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.

The Coupling Effect in Drying Section in Traveling Grate ...

Feb 01, 2021 · 高达10%返现 · Traveling grate is a widely used process for iron ore pellet production; however, the thermal state of pellets in drying section is still unclear. In this study, the temperature distribution of drying section was investigated using computational fluid dynamics (CFD). Based on the calculated results of airflow velocity, space temperature distribution, and the temperature change of pellets

Temperature Distribution of Iron Ore Pellet Bed in Grate ...

Feb 01, 2012 · The components of green pellet are iron ore powder 89. 8 %, bentonite 1. 1 % and water 9%; and the basic properties and compo› sition of magnetic iron ore are given in Table 2. 1. 1 Grate and process flow The main function of grate IS for drying and preheating of the green pellets.

Predictive models and operation guidance system for iron ...

Aug 04, 2015 · The schematic figure of grate–kiln–cooler process for iron ore pellets is shown in Fig. 2. Processing of green pellets prepared from pelletizer is accomplished by three equipments: traveling grate (drying and preheating), rotary kiln (roasting) and circular cooler (cooling).

picture of travelling grate in iron ore pellet plant

Iron Ore Pellet Kiln Burners FCT Combustion. A range of highquality, compact burners, specifically designed for iron ore sintering and pelleting plants using traveling grate kilns. Iron Ore Pellet Kiln burners can also be used in a number of other applications such as hot gas generators, calciners and preheat chambers.

drying and preheating processes of iron ore pellets in a ...

The iron ore pelletizing process consists of agglomerating, drying, preheating, hardening, and cooling the iron ore green pellets in the indurating machine (traveling grate furnace). This process

drying and preheating processes of iron ore pellets in a ...

Drying and preheating processes of iron ore J.X. Feng et al., Drying and preheating processes of iron ore pellets in a traveling grate 537 3.2. Governing equations (1) Gas energy conservation equation · 2017-8-26 Travelling Grate In Iron Ore Pelletising. Ferrous metals

Drying of Iron Ore Pellets - Analysis with CFD

Pellets can be indurated in shaft furnaces, in grate-kilns and on traveling grates. The principle of sintering pellets is almost the same in grate-kilns and on traveling grates. The process starts with up- draught drying (UDD), followed by down- draught drying (DDD), a preheating

Cooling process of iron ore pellets in an annular cooler ...

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.

travelling grate for iron ore

Drying and preheating processes of iron ore pellets in a. Drying and preheating processes of iron ore pellets in a The temperature profile of the iron ore pellet bed in a traveling grate was systematically measured...

Temperature Distribution of Iron Ore Pellet Bed in Grate ...

Feb 01, 2012 · The components of green pellet are iron ore powder 89. 8 %, bentonite 1. 1 % and water 9%; and the basic properties and compo› sition of magnetic iron ore are given in Table 2. 1. 1 Grate and process flow The main function of grate IS for drying and preheating of the green pellets.

冯俊小 - 北京科技大学 - 能源与环境工程学院

Drying and preheating processes of iron ore pellet in traveling grate. International Journal of Minerals, Metallurgy and Materials, Vol17,No5,October,2010. P535-540 [10] Feng Junxiao, Cheng Qibo and Yu Sijing.

PLASMA HEATED FURNACE FOR IRON ORE PELLET INDURATION

Dec 03, 2012 · The most commonly employed method of heat-hardening, such as described for example in U.S. Pat. No. 3,947,001 issued to Leighton, is of disposing the iron ore pellets on a travelling grate to carry the pellets through a tunnel-like enclosure where they are progressively subjected to drying, preheating, firing, after-firing and cooling.

Grate kiln pelletizing plant - Outotec

The Travelling Grate is where pellets are dried and then heated up to a temperature of about 800-900 deg C. The heat used to dry and preheat the pellets is typically hot air pulled from the Kiln and cooler. The recycling of the the hot air from the different zones increases energy efficiencies.

China Traveling Grate Factory - Traveling Grate ...

Oxidized pellets. 27. 3.5 x 39 m. Xuanhua iron and Steel Group Co Ltd. 1 million tons. Oxidized pellets. 28. 3.1 x 36 m. Benxi North Iron Ore Co Ltd. 750 thousand tons. Oxidized pellets. 29. 2.8 x 30 m. Jiangsu Metallurgical Design Institute (chain grate type drying machine) 300 thousand tons. metallized pellet. 30. 2.2 x 35 m. Lingyuan Yunnan ...

Influence of Pellet Size on Quality and Microstructure of ...

The traveling grate is loaded with approximately 0.05m height of fired pellets as hearth layer to protect the grate and then 0.50m of green pellets. The induration process consists of three main steps; 1) Drying for green pellets 2) Firing of pellets at 1250–1300°C to sinter the iron oxide particles 3) Cooling of hot pellets before ...

difference between rotary kiln and straight grate technology

comparision straight grate versus grate kiln cooler. difference between rotary kiln and straight grate technology grate kiln technology manufacturers in india grate sintering iron pellets grate kiln type furnace or a straight gratekiln iron ore pelletizing plant the aim the pellets are fed into a rotary kiln Drying and preheating processes of iron ore pellets in a A mathematical model of ...

(PDF) Development and application of thermal mathematical ...

Based on the analysis of heat transfer mechanics, physical and chemical change of pellet drying and preheating process in grate, the mathematical model is established and solved by three-diagonal matrix algorithm. With Visual Basic 6.0 a simulation

MATHEMATICAL MODEL FOR ENERGY SAVING IN

plant scale iron ore pellet induration furnaces is presented. The experiment was performed in such a way that phenomena of heat transfer, drying and coke combustion [8]. K. H. Boss [9] developed a model for straight grate pelletizing process and added higher amounts of coke to iron ore pellets without effecting the quality of fired pellets.

Introduction to Iron ore Pellets and Pelletizing processes ...

Feb 23, 2013 · The grate kiln process was developed by former Allis Chalmer and the first plant on this technology was constructed in 1960. In the grate kiln process (Fig 3) the traveling grate is used to dry and preheat the pellets. Material moves on straight travelling grate

EXPANSION AND MODERNIZATION OF AN IRON ORE

drying, downdraft drying, preheating, firing, after-firing and cooling zones. A major advantage of the traveling grate is that the green pellets remain undisturbed throughout the process. LKAB is an international high-tech minerals group, one of the world’s leading producers of upgraded iron ore products for the steel rowing supplier of ...

Eiaion of Wae ea fro Ehau ae of an ron re elleiing lan in ran

al. [9] also developed a mathematical model for the drying and preheating phenomena of iron ore pellets in a traveling grate based on mass, momentum and heat transfer laws, and semi-empirical correlations. The effect of the pertinent parameters including the mean diameter of pellets, the grate

US6241808B1 - Production of iron ore pellets - Google Patents

A process for producing fired pellets by granulating finely-ground iron ore and subjecting the resulting granules sequentially to drying, dehydration, preheating, and firing, wherein said process comprises adding an additive to said finely-ground iron ore at the time of granulation, said additive reacting with iron ore to form a compound which has a melting point lower than the preheating ...

(PDF) Development and application of thermal mathematical ...

Based on the analysis of heat transfer mechanics, physical and chemical change of pellet drying and preheating process in grate, the mathematical model is established and solved by three-diagonal matrix algorithm. With Visual Basic 6.0 a simulation

Influence of Pellet Size on Quality and Microstructure of ...

The traveling grate is loaded with approximately 0.05m height of fired pellets as hearth layer to protect the grate and then 0.50m of green pellets. The induration process consists of three main steps; 1) Drying for green pellets 2) Firing of pellets at 1250–1300°C to sinter the iron oxide particles 3) Cooling of hot pellets before ...

Understanding Pellets and Pellet Plant Operations – IspatGuru

Mar 21, 2015 · Fig 2 Typical schematic diagram of straight grate system. The grate-kiln system depicted in Fig 1 consists of a traveling grate for drying and preheating the pellets to about 1040 deg C, a rotary kiln for uniformly heating the throughput to the final induration temperature of 1315 deg C, and an annular cooler for cooling the product and heat recuperation.

Influence of Oxide and Silicate Melt Phases on the RDI of ...

The traveling grate is loaded with approximately 0.05m height of fired pellets as hearth layer to protect the grate and then 0.50m of green pellets. The induration process consists of three main steps; 1) drying for green pellets, 2) firing of pellets at 1250–1300°C to sinter the iron oxide

AU2020200669A1 - Plasma heated furnace for iron ore pellet ...

PLASMA HEATED FURNACE FOR IRON ORE PELLET INDURATION In the present pelletizing apparatus, the induration of iron ore concentrate pellets is achieved in a tunnel furnace heated by plasma torches, wherein the generation of C02 by the conventional iron ore pelletizing processes is reduced by using electricity powered plasma torches instead of burning natural gas, heavy oil or

[PDF] Dynamic simulation of pellet induration process in ...

Abstract A mathematical model of pellet induration process in the straight-grate system is presented. The important physical and chemical phenomena known to affect the heat and mass transfer in the process have been taken into account in the formulation of the model. These include heat transfer between gas and pellet, gas flow, evaporation and condensation of moisture, oxidation of magnetite ...

Study of the Parameters Influencing the Temperature ...

The thermal state of iron ore pellets during traveling-grate processes is complex, and sintering is a complex coupling process involving multiple physical factors. In this study, the temperature distribution during updraught drying (UDD) is investigated using computational fluid dynamics (CFD) and orthogonal testing. Based on the calculated temperature profiles and temperature increase at ...

US Patent for Plasma heated furnace for iron ore pellet ...

Dec 03, 2012 · The most commonly employed method of heat-hardening, such as described for example in U.S. Pat. No. 3,947,001 issued to Leighton, is of disposing the iron ore pellets on a travelling grate to carry the pellets through a tunnel-like enclosure where they are progressively subjected to drying, preheating, firing, after-firing and cooling.

PLASMA HEATED FURNACE FOR IRON ORE PELLET INDURATION ...

5. A pelletizing method, wherein ore pellets are fed sequentially through drying, firing and cooling zones, and wherein heat required for the process is provided by at least one plasma torch. 6. The pelletizing method according to claim 5, wherein the ore pellets are transported by a traveling grate through the drying, firing and cooling zones. 7.

Iron Ore Pelletizing Process: An Overview | IntechOpen

Jul 11, 2018 · The iron ore production has significantly expanded in recent years, owing to increasing steel demands in developing countries. However, the content of iron in ore deposits has deteriorated and low-grade iron ore has been processed. The fines resulting from the concentration process must be agglomerated for use in iron and steelmaking. This chapter shows the status of the pelletizing process ...