The traveling grate is a kind of thermal equipment, used for drying and preheating green pellets in iron ore pelletizing plants. AGICO offers high efficiency and long service life traveling grates with an output from 0.3 million tons per year to 4 million tons per year.
in shaft furnaces, grate-kiln systems or on straight grates. Rotary kilns were originally developed in the late 19th century for Portland cement production [1]. The main development work for the successful adaptation of the process to the thermal
Sep 22, 2020· Based on the pelletizing process, the Europe iron ore pellets industry is segmented into travelling grate, grate kiln, and others. Others segment include shaft furnace, cold bonded palletization process, etc. and accounts for a significant share. The shaft furnace pelletizing process is traditionally used in many facilities across Europe.
Переводы в контексте "grate furnace" с английского на русский. Здесь вы найдете много примеры переводов содержащие "grate furnace" - английский-русский перевод и система поиска по миллионам английских переводов.
Mar 21, 2015· Shaft furnaces are more energy efficient than the traveling grate or grate-kiln systems. The shaft furnace is well suited for pelletizing magnetite, but not hematitic or limonitic ore materials. Disadvantages of shaft furnaces are low unit productivity and difficulty in maintaining uniform temperature in the combustion zone.
Highlight of the grate-kiln technology: > strong adaptability on the flexible raw material characters; > it can use coal as fuel; > the requirement of main equipments on high temperature resistance quality is relatively low. > both hematite and magnetite available. > high productivity with high-level automation. > green and mass production.
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. In this study, the physical and chemical ...
shaft furnace, rotary kiln or grate system similar to a sinter strand. Because of their regular size and shape, and their hard, dense nature, pellets were considered an ideal feed material for blast furnace operations. Table 3: Typical Analyses of Australian Coking …
Nov 24, 1995· The traveling grate chain travels through the furnace chambers then over a head shaft then under the respective windboxes through ambient air then back to its starting point. At the discharge end of the grate the pellets can be fed into a rotary kiln for additional heating or the pellets can be cooled by air being forced upwardly through the ...
Grate kiln indurating furnace means a furnace system that consists of a traveling grate, a rotary kiln, and an annular cooler. The grate kiln indurating furnace begins at the point where the grate feed conveyor discharges the green balls onto the furnace traveling grate and ends where the hardened pellets exit the cooler. The atmospheric pellet ...
Feb 01, 2021· 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, it ...
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…
W Grate/kiln furnace feed 3-03-023-49 ... c Traveling grate feed 3-03-023-09 c Traveling grate discharge 3-03-023-10 ... apparatus currently used are the vertical shaft furnace, the straight grate, and the grate/kiln. Most large plants and new plants use the grate/kiln. Currently, natural gas is the most common fuel used for pellet
US3024101A US587393A US58739356A US3024101A US 3024101 A US3024101 A US 3024101A US 587393 A US587393 A US 587393A US 58739356 A US58739356 A US 58739356A US 3024101 A US3024101 A US 3024101A Authority US United States Prior art keywords bed green furnace grate balls Prior art date 1956-05-25 Legal status (The legal status is an assumption and is not a legal …
Three types of furnaces are used: shaft furnace, traveling grate, and grate-kiln, and tempera-ture will depend on the kind of pellet. Pellets can be classified into three groups: Blast Furnace grade . They are dried at 105 120 C, and then indurated at high temperature
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 ...
Vertical Shaft Kiln Technology 20 The machine is outdated and is being gradually phased out in view of technological upgrade in the filed of induration. Vertical shaft furnaces are not as common as the traveling grate or grate kiln systems. The shaft furnace is well suited for pelletizing magnetite, but not hematitic or limonitic ore materials.
Straight Grate Induration Furnace Nordgren ISSN: 1402-1757 ISBN 978-91-7439-185-5 ... **Straight grate process, ***Grate kiln process Process unit Malmberget Kiruna Svappavaara Ore bodie(s) ~20 (10)* 1 1 ... conveyer to a skip shaft at the 815 level where the ore is …
THEODORE E. SEPPANEN, SR. Trained and worked on all aspects of the grate-kiln operation at the Empire Mine operated by Cleveland-Cliffs including: Balling and Screening (Vibrating and Roller Screens), Bentonite and Organic Binder Addition and Mixing, Conveying and Distribution of Green Balls on the Grate Bed, Induration of Green Balls, Grate ...
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 ...
Vertical Shaft Furnace Travelling Grate Grate Kiln C. - C. Higher temperatures are avoided as they drastically reduce the porosity of the pellets. This is detrimental for blast furnace operation. The holding time at such temperatures also affect the quality of the pellets and should be chosen based upon consideration of ...
Grate-kiln systems can be designed for production tonnage's up to 6 million tonnes per year per line. 8.5.2.3Vertical Shaft Furnaces. Vertical shaft furnaces are not as common as the traveling grate or grate-kiln systems. There are sev- eral variations in shaft furnace design but the most common is the Erie type, shown in Fig. 8.38.
Gjer's kiln—a stack furnace for roasting ores—simple and efficient but largely replaced by equipment offering automatic discharge and a greater degree of control, e.g. sintering machines. Low shaft furnaces have evolved from high shaft furnaces already described, for use where a high degree of preheat and prereduction of ore is not ...
Ir 11111515 leier t ll rit reere Iron ore pelletization 15 D. Zhu. 1, J. Pan, L. Lu. 2, R.J. Holmes. 3. 1. Central South University, Changsha, Hunan, China. 2. CSIRO ...
Straight traveling grate technology has numerous benefits as compared to Grate kiln : STRAIGHT TRAVELING GRATE ROTARY GRATE KILN INDURATING FURNACE. vertical shaft kiln technology for induration Iron Ore Pellet Plant vertical kilns for . shaft furnace . develop rotary kiln technology and quicken the . coal fired straight grate iron ore ...
The primary mode of heat transfer in tower furnaces is through convection by direct impingement of the burner on the metal in the lower section of the tower, and by the combustion gases as they travel out of the tower past the metal charged into the shaft. A variation of the tower furnace uses a grate system that lowers the metal through four ...
In iron processing: Pelletizing. …of firing equipment was the shaft furnace. 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…. Read More.
Shaft furnaces use gravity to move charges down, and counter-flow of hot burning gases supports heating. The grate-kiln uses a combination of a rotating kiln attached to a horizontal traveling grate and a cooler. This ensures that firing, drying and cooling processes occur separately. Pellets are charged at a single end of the traveling grate.