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 …
Outotec is the only OEM in the world to ofer Straight Grate technologies for both, iron ore sintering and pelletizing plants. Our strength and expertise in equipment, parts and services for the sintering process are designed to increase capacity, reduce fuel and power consumption, extend lifetime, performance and cut maintenance costs.
Techno-economic Evaluation of Iron Ore Pellet Manufacturing Processes in India and Justification for new units in Odisha
A mathematical model is developed for induration of the iron-ore pellets in an industrial-scale plant based on the laws of mass, heat and momentum tra…
The induration process in travelling grate typically consists of four distinct phases: drying, preheating, firing, and cooling. The first stage of drying is updraft to prevent condensation of water and consequential pellet deformation in the bottom layers of the pellet bed. Drying is continued in a subsequent downdraft stage by relatively hot ...
On the straight grate, the pellets remain stationary and are carried by the pallet cars throughout the various process zones. Due to the number of transfer points and tumbling movement in a rotary kiln, most dust is generated in the grate-kiln plant itself, which have to be recycled internally. Such fines are not generated in the straight grate due to the …
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 …
Head Operation & Maintenance and Project at Iron ore Beneficiation and Pelletization Plant/Engineering and Technical Consultant · Project Planning,Execution, Monitoring,Control, Commissioning Operation and Maintenance. *Executed Project like 2 Pellet Plant and 2 Beneficiation Plant Successfully.Also Worked at 350 TPD Sponge …
The first iron ore pellet plant of the grate-kiln type was established at Humboldt Mine, Michigan in 1960. Allis-Chalmers (a predecessor company to ) have since built around 50 such plants.
been operating a beneficiation plant since January 2014, and the pellet plant will follow in late 2015. Pro Minerals is a sister company of Hari Machines Ltd. (manufacturing workshop), allmineral asia (equipment and technology provider for benefic. ation plants) and Cemtec India (equipment and technology provider for grinding and pe. PLANT DATA.
• Experience in handling from Green field Projects concept to Commissioning & Maintenance for Iron ore Pellet & Beneficiation plant of 0.6,1.2 & 3 MTPA capacity using Chinese Grate Kiln (GK)Technology,Russia Uralmash Straight Grate Technology,:Outotech Straight Grate Technology and for Direct Reduction of Iron …
What Is the Iron Ore Pellet Screening Process? The iron ore and a number of additives with given moisture content are mixed and then formed into small balls (pellets) in a balling drum or pelletizing disc. Pellets are later discharged on the roller screens. Roller screens (feeders) are used to remove pellets that do not meet the sizing criteria.
Cleveland-Cliffs Iron Company, in December, 1976, embarked on an extensive test program utilizing various intensive mixing devices in an attempt to reduce present bentonite consumption in the pelletizing operations while maintaining pellet quality. Bentonite mixing devices tested at the LKAB straight-grate plant at Malmberget, …
a b s t r a c t A mathematical model is developed for induration of the iron-ore pellets in an industrial-scale plant based on the laws of mass, heat and momentum transfer.
Three types of conventional induration furnaces are used for the thermal hardening of the green pellets: vertical shaft furnace, grate-kiln furnace and moving straight-grate furnace. Cur-rently, AM/NS India operates total four straight-grate induration furnaces in two pellet plants having an annual production capacity of 20 MTPA.
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.
A clear distinction between the dustiness of grate-kiln and straight-grate fired pellets is established. We conclude that grate-kiln-cooler systems provide superior pellet quality, but at the cost of some pellet production rate.
Finland's Outotec has secured an order for an iron ore beneficiation and travelling grate pelletising plant for an as yet unnamed Africa project.
Iron Ore Pellets and Pelletization Process. Pelletizing of iron ore was started in the 1950s to facilitate the utilization of finely ground iron ore concentrates in steel production. For the pelletizing of iron ore there are two main types of processes namely, the straight travelling grate (STG) process and the grate kiln (GK) process.
Straight grate technology is producing nowadays more than 75% of the DR grade pellets worldwide and it is the only technology capable to successfully process different source of iron ores assuring the maximum flexibility to the pelletizing plant.
Moreover, pellets in straight-grate furnaces are mostly immobile, meaning that the required compression strength of preheated pellets in straight-grate processes is lower than that in grate-kiln ...
Outotec's scope of delivery consists of the supply of core pelletizing plant equipment, including the traveling grate, rotary kiln, and annular cooler. The design is based on the Grate Kiln plants that Outotec is currently supplying for a customer in India. The plant, which is planned to produce six million tons of high-quality iron ore pellets per …
Grate kiln pelletizing plant Outotec. The grate chain travels flat and straight. The grate travels through a furnace with several zones that expose the pellets to different temperatures. Once the pellets are discharged into the kiln, the grate chain returns underneath. The grate is driven by a motor with gearbox or hydraulic drive.
Grate process is an important step in grate-kiln pellet production. However, as a relatively closed system, the process on grate is inaccessible to direct detection, therefore, it is hard to control. As a result, mathematical models of temperature distribution, moisture distribution and oxidation degree distribution in pellet bed, with good …
As greater amounts of fine iron ore concentrates enter the marketplace, new investments in iron ore pelletizing capacity are inevitable to deliver these concentrates to steel industry consumers. When investors assess the two well proven pelletizing technologies, the straight grate and grate-kiln, the most appropriate choice may not be immediately …
There are two main technologies/processes for producing iron ore pellets: The Grate-Kiln System and the Straight Grate System. The First Grate Kiln System pellet plant was installed in 1960.
Outotec has designed and delivered 30 straight grate pelletizing plants and 20 sinter plants in the last 20 years.
However, today there is an increasing demand for plants with smaller capacities," says Matthias Gabriel, Director, Ferrous product group at Outotec. He adds: "We have already won an order for this technology and will be installing our first three meter wide travelling grate pellet plant in Nagarnagar, Chhattisgarh, in central India.
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 avoid fragmentation in transportation. As against a conventional burner the ...
