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Feb 23, 2013· Grate kiln process. 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 till it attains the temperature in the range of 800 deg C to
In iron processing: Pelletizing This was followed by the grate-kiln and the traveling grate, which together account for more than 90 percent of world pellet output. In shaft furnaces the charge moves down by gravity and is heated by a counterflow of hot combustion gases, but the grate-kiln system combines a horizontal traveling grate…
Jan 01, 2012· Traveling grate and grate-kiln processes rely on the pellets being carried through a number of thermal zones by a moving perforated grate; in the case of the straight-grate, the final stage of induration occurs in a rotary kiln. The grate-kiln technology is shown in Figure 1.2.8 .
The traveling grate is comprised of chain that carries the pellets like a conveyor. The difference is that the grate chain allows air to pass through it. The grate chain travels flat and strait. There are several compartments the pellets are exposed to different heat.
Grate plate, chain casting & bushing are produced through ceramic molding method in order to achieve high surface quality and the required casting dimensional tolerances. At the present time, Ardakan Pelletizing Complex is the sole pelletizing plant in Iran, operating by grate-kiln process.
Jul 11, 2018· However, the final pellet properties are more uniform, and fines generation during transport for final use is therefore expected to be lower for pellets produced in the grate-kiln process. The worldwide pelletizing capacity is divided into 60% for the straight grate process and 40% for the grate-kiln.
2 straight grate plants with a total capacity of 16.5 million t/a (2/3 grate kiln, 1/3 straight grate) and in Canada, where IOC operates 4 straight grates at Carol Lake, New Foundland, with a combined capacity of 13 million t/a. The installed pelletizing capacity world-wide amount totals 685 million t/a with 410 million t/a coming from straight
Oct 17, 2008· will deliver an iron ore pelletizing plant including rotary kiln, traveling grate, annular cooler and the balling system, complemented by …
Description of Grate-Kiln Process LKAB has three pelletizing plants based on the Grate-Kiln process and a fourth plant, KK4, is under construction. The process consists of three parts; grate furnace with moving grate band, rotary kiln and an annular cooler, see flowsheet in Figure 1. Wet green pellet balls are fed on the moving grate to form
Grate kiln process 2. Travelling grate process. Choice of one over the other will be based more on economics rather than the technical aspects 10. GRATE KILN PROCESS Process adopts three equipment viz. grate, rotary kiln and annular cooler. Green balls are first dried and preheated on the straight grate followed by
Traveling Grate In Iron Ore Pelletizing Plant. The origin of Pelletizing Process is GRATE KILN technology which Read more. iron ore pellet plant process Ltd. is a high technology, Flow Chart Of Iron Ore Pellet Plant Process,Manganese. Search flow chart Pellet Plant Flow Sheet.
Pelletizing –Technology for Generation Next !!! temperature. abrasion from pellets. Modular design of traveling grate allows … grate technology for Pelletizing Iron Ore … Plant with Grate Kiln technology … »More detailed
In the Grate-Kiln process the traveling grate is used to dry and preheat the pellets. Material moves on straight travelling grate till it attains the temperature of 800°C to 1000°C. Thereafter it is transferred to refractory lined rotary kiln for induration where the temperature is further raised up-to 1250 – 1300°C.
Grate-Kiln Traveling Grates 0 20 40 60 80 100 120 140 Magnetite Magnetite/ Hematite Hematite Limonite/ Weathered Ores 1.8 4.2 1.2 0.0 25.0 2.6 3.1 0.0 89.2 52.6 36.3 5.6 126.5 52.8 120.7 44.4 C a p a c i t y (e v e r b u i l t) [M i l l. t / a] Pelletizingcapacity ever built China not fully shown Status: 07/2012 16 April 2013 Recent
Two indurating furnace technologies dominate the pelletizing industry, the straight travelling grate and the grate-rotary kiln technologies. Although some of Metal 7’s products could be adapted for the grate-rotary kiln operation, the company mainly focuses on the straight travelling grate applications.
continuous traveling grate reactor. When investors assess the two well proven pelletizing technologies, the straight grate and grate-kiln, the most appropriate choice may not be immediately
Grate is a kind of thermal equipment working at high temperature, and its main parts are made of heat-resistant alloy steel. The working mode is to distribute the iron pellet on the grate bed running at a slow speed, the waste heat from the ring cooler and the hot air from the rotary kiln are used to dry, preheat and oxidize and consolidate the pellets, and then directly send it to the rotary
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.
In recent years, the rapid development of domestic steel industry greatly promoted the development of the ball industry. chain grate rotary kiln oxidation pellet production line is composed of multiple equipment, including chain grate machine, rotary kiln, Grinding machine, dryer, pelletizing machine, cloth machine and other ancillary equipment.
*Ten are currently being mined, **Straight grate process, ***Grate kiln process Process unit Malmberget Kiruna Svappavaara Ore bodie(s) ~20 (10)* 1 1 Sorting plant 1 1 - Concentrating plant 1 3 1 Pelletising plant 2** 3*** 1*** Description of the LKAB upgrading process chain in Malmberget
Plant overview Grate-KilnTM iron ore pelletizing system The first Grate-KilnTM system pellet plant was installed in 1960. The plant took iron ore concentrate and produced superior iron ore pellets (which are spheres of high iron content and uniform quality) for blast furnace and direct reduced iron feed. Since then, Grate-Kiln systems have been used for over 50 plants, on both magnetite and
With a scientific history of 30 years in rotary kilns and 10 years in traveling straight grate pelletizing plants, FCT has well proven that the burner design cannot be satisfactory unless furnace design (geometry, aerodynamics), operation philosophy and all other relevant parameters have been considered accordingly. In many cases, feedback
May 01, 2017· The objective of this research is to study the quality of blast-furnace iron ore pellets with binary basicity 1 fired on a pilot scale using the two main firing processes that are presently in use in the world and comparing them. Currently, the great majority of pellet producers use the traveling grate process because of its higher production capacity.
Outotec Traveling Grate Pelletizing is the industry’s leading induration technology for iron ore pellet processing and is designed for a wide range of plant capacities up to 9.25 million t/a. Based on over 60 years’ experience and world-class R&D, our process produces
Kiln drive components Equipment description Grate The traveling grate is a conveyor that transports balled iron ore concentrate through cross-flow processing zones. The conveying element is a continuous loop assembly of slotted ferrous stainless steel grate plates, chain castings, and side plates to carry a bed of agglomerates.
traveling grate, kiln, annular cooler, allows control of residence time in each •Multiple burners provides process flexibility •Single burner in kiln, additional burners in traveling grate when processing hematite
Figure 2 – Basic diagram of Rotary Kiln and Traveling Grate Furnaces ( 2, 3 ) Nowadays, total world capacity of pelletizing is a round 380 Mt/year of pellets to be used as feedstock for blast
Other articles where Grate-kiln furnace is discussed: iron processing: Pelletizing: This was followed by the grate-kiln and the traveling grate, which together account for more than 90 percent of world pellet output. In shaft furnaces the charge moves down by gravity and is heated by a counterflow of hot combustion gases, but the grate-kiln system combines a horizontal traveling grate…
Grate-Kiln System for iron ore pelletizing TON. Traveling grate CFD Model Baffle walls Preheat zone Common windbox, sloped floor Feautures and benefits Pellet quality Ported kiln operation Predictive control systems Because the induration of the pellets occur in the rotary kiln, the pellets produced in a Grate-Kiln system are consistently of higher quality than those produced in a straight grate.
straight grate pellet plant from china. straight grate pellet furnace - resourcementcentre. straight grate pellet furnace Effect of Preheat Burners on a Straight Grate Induration Furnace The CO2, Machine is a Straight Grate Indurating Furnace, Blast Furnace and Stoves - Eurotherm Blast Furnace and Stov, The furnace is charged with sinter pellets and rubble, The iron is now ready to be sent
This was followed by the grate-kiln and the traveling grate, which together account for more than 90 percent of world pellet output. In shaft furnaces the charge moves down by gravity and is heated by a counterflow of hot combustion gases, but the grate- kiln system combines a horizontal traveling grate with a rotating kiln and a cooler so that
Feb 23, 2013· In the grate kiln process (Fig 3) the traveling grate is used to dry and preheat the pellets. Material moves on straight travelling grate till it attains the temperature in the range of 800 deg C to 1000 deg C.
(traveling grate furnaces, straight grate pelletizing plant) The experimental data show that the Lurgi traveling grate machine has great scope for increase in burner anddraft-unit power. Mathematical simulation permits the development of various options for the thermal system,with gradual increase in pellet output from 3.2–3.5 to 4.5 million
Traveling grate CFD Model Baffle walls Preheat zone Common windbox, sloped floor Feautures and benefits Pellet quality Ported kiln operation Predictive control systems Because the induration of the pellets occur in the rotary kiln, the pellets produced in a Grate-Kiln system are consistently of higher quality than those produced in a straight grate.
Traveling grate The traveling grate is comprised of a blanket of plates connected into a chain that carries the pellets similar to a conveyor. The difference is that the plates in the grate chain have holes in them that allows air to pass through it. The grate chain travels flat and straight.