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US4129437A - Iron ore pellet having a specific shape and a ...
US4129437A US05/690,289 US69028976A US4129437A US 4129437 A US4129437 A US 4129437A US 69028976 A US69028976 A US 69028976A US 4129437 A US4129437 A US 4129437A Authority US United States Prior art keywords pellet pellets iron ore particle size crushed Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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ore particle size pellet strength
Pellet production requires iron ore concentrates have fine particle size, high specific surface area and good balling performance, so iron ore concentrates appropriate for pelletizing is limited compared to sintering In order to extend the iron ore resources for pelletizing, the iron ore fines for …
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Iron Ore Pelletizing Plant - Iron Ore Pelletizing | Pellet ...
Iron ore pellets are the indispensable material used in steel making process. It is the basis of the steel industry, which features high iron grade, uniform particle size, good reduction performance, high mechanical strength, and long storage time.
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Improvement of mechanical strength of iron ore pellets ...
Particle size and shape of iron ore concentrate are effective parameters in the production of quality green pellets. In this research, the effect of particle morphology on green pellet quality was ...
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Prediction Model of Iron Ore Pellet Ambient Strength and ...
Particle size of ore, -74 m/% 76.88 5.3 Bentonite, % 1.22 0.1 Green Pellet Moisture of green pellet, % 8.0 0.36 CS of green pellet, N/pellet 15 2.0 Dropping strength, Times/pellet 60.6 Pellet diameter, mm 13 1.0 Porosity of green pellet, % 301.9 Chemical Composition FeO, % 0.7 0.02 MgO, % 0.6 0.03 CaO, % 0.5 0.01 Al 2O
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Effect of Micro-particles in Iron Ore on the Granule ...
strength of granulated iron ore, two pelletizing tests were conducted. One was to measure changes in pellet strength that take place due to changes in the amount and types of micro-particles, and the other was to measure changes in pellet strength as the pellets dried. For these tests, to evalu-ate the bond strength of the adhered zone in the ...
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iron ore particle size pellet strength
In order to limit the effect of particle size on the strength of iron ore pellets, it is more appropriate to use the peak stress than the fracture load Gustafsson et al compared 3D finite element simulations of a model of an irregularlyshaped iron ore pellet with that of a spherical pellet They showed that the equivalent effective stresses
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THE EFFECT OF PARTICLE SIZE ON GREEN PELLET PROPERTIES …
absorption of 0.03 at a particle size range of 0.02 µm to 2000 µm. The particle size of iron ore concentrate (pellet feed) were carried out by particle size analyzer, are given in Figure 5. Figure 5. Particle size analysis of pellet feed The results indicate that the 100 % passing size of this sample is 75 µm. More than 90%
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Processing And Pelletizing Of Low Grade
Jun 17, 2013 iron ore agglomeration Vanguard QA. 15 Feb 2013 pIRON ORE Free download as PDF File (.pdf), Word Doc (.doc), Text manufacturer supply complete Iron ore mining equipment for Iron oa is to certify that thesis entitled,Reduction Kinetics of iron ore pellets and the effect of/ p p1 processing and pelletizing of low grade malaysian iron ore
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Procedures for Determining Pelletizing Characteristics of ...
The extent of the bonding phenomena and the consequent strength of fired pellets is governed by some of the following firing conditions and properties of the unfired pellet: 1- mineralogical composition of the pellet. 2- particle packing within the pellet. 3- particle size range, of the minerals comprising the green pellet. 4- maximum ...
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Iron Ore Particle Size Pellet Strength
The agglomerated green pellets have a productions size which range between 9 and 16 mm in diameter.Table 2.5 Wet or green pellet strength of hematite 34 Table 2.6 Moisture on pelletizing various types of materials 37 Figure 4.3 The particle size distribution of iron ore after ball 82 Figure 4.4 Fraction (-300 m +212 m).a) Hematite interlocked ...
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Iron Ore Pelletizing Process: An Overview | IntechOpen
Ore particle shape, size, texture and capability of water retention, capillarity and cohesive strength among different particles determine the velocity of pellet growth during balling and pellet porosity. Ore characteristics also influence on the required amount of binder to produce pellets with satisfactorily quality.
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The iron ore importance in Direct Reduction
characteristics of iron ore pellets. 1.2. Development of chemical and physical properties. ... Particle size distribution The most suitable particle size of iron ores to be processed in the HYL reactor is in the range of +6 mm and -16 mm. a) Large particles present higher resistance for reduction. ... The strength of the ore (and the associated ...
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Investigation of iron ore particle size and shape on green ...
Particle size and shape of iron ore concentrate are effective parameters in the production of quality green pellets. In this research, the effect of particle morphology on green pellet quality was studied. It was concluded that pellet quality improved with increasing specific surface area.
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Influence of particle size on strength of pelleted feed
Influence of particle size on pellet strength Once the compressibility data was obtained for the ground wheat (referred as "entire particle size distribution" - EPD), it was done a curve fit to EPD data to find the compressive stress that can produce pellets with a similar density to the pellets produced ...
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Particle size analysis of pellet feed | Download ...
The particle size of iron ore concentrate (pellet feed) were carried out by particle size analyzer, are given in Figure 5. The results indicate that the 100 % passing size of this sample is 75 µm.
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EFFECT OF SIZE DISTRIBUTION AND WATER CONTENT ON ...
pellet charge trials in blast furnaces, with full-scale adoption said to be very likely in the near future. Another major significance of pellets lies in the ability to consume magnetite ores, which were otherwise problematic for ironmaking processes. The following is a classification of iron ore size used in various forms for
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Influence of initial iron ore particle size on CO 2 ...
Influence of initial iron ore particle size on CO 2 gasification behavior and strength of ferro-coke: Run-sheng Xu 1,2, Shu-liang Deng 1, Heng Zheng 2, Wei Wang 1, Ming-ming Song 1, Wei Xu 3, Fang-fang Wang 4,5: 1 State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China 2 Chair of Metallurgy, Montanuniversitat Leoben, Leoben A ...
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(PDF) The effect of particle size on green pellet ...
The effect of particle size on green pellet properties of iron ore fines. January 2017. Journal of Mining and Metallurgy A Mining 53 (1):31-41. DOI: 10.5937/JMMA1701031S. Project: Characterization ...
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PAPER OPEN ACCESS Related content Characterization of iron ...
Pellet quality were determined by testing the pellets at different stages of the process. Tests were conducted for the pellets: 1) drop test for dry pellets, 2) compressive strength and porosity for dry and heated pellets, and 3) Hardness for heated pellets 4) wear rate 5) Particle size distribution analysis. 2.2.1. Drop number of dry pellets.
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Steel Pellets Manufacturer in Kolkata, Iron Pellets ...
The iron pellets are produced with cold crushing strength (CCS) of 210+ and porosity of 24+" which helps to maintain grade in DRI fem – 80+ and our product mean particle size (MPS) is ~9.5-10 which assists in reducing oxygen in kiln and maintain consistency in grade. Iron Pellets are used as raw material for sponge iron and blast furnace.
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Prediction Model of Iron Ore Pellet Ambient Strength and ...
Based on previous practical experience at the typical ironmaking plants of China, 19 factors were selected as the initial input variables, including particle size of ore, bentonite dosage, moisture of green pellet, CS of green pellet, dropping strength, pellet diameter, porosity of green pellet, FeO%, MgO%, CaO%, Al 2 O 3 %, basicity (CaO/SiO 2 ...
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Effect of sodium bentonite on crushing and drop strength ...
Particle size and shape of iron ore concentrate are effective parameters in the production of quality green pellets. In this research, the effect of particle morphology on green pellet quality was ...
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Influence of particle size on strength of pelleted feed
by particle size, meaning that it is not possible to compare the effect of the different size fractions separately using the same pressure, temperature and moisture content. This research uses a new laboratory pelleting press to analyse the effects of particle size on pellet strength under the same pressure, temperature
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Recrystallization of Fe O During the Induration of Iron ...
strength of pellet with H/M=70:30 reaches 559 N/P when preheated at 900 qC for 10 min, while the strength of pellet with H/M=50:50 exceeds 560 N/P when the time is more than 5 min. Fig. 2b shows that the preheated pellet strength keeps increasing with the preheating temperature varying from 800 to 1000qC. The strength of the pellets with
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Modification of Porosity for Direct Reduction of Manganese ...
The particle size of ore powder is positively correlated to porosity as smaller particle size facilitates the sintering event, hence lower porosity. While the increase in porosity by CaCO 3 has a positive effect on pellets reducibility, the effect of particle size is more complicated as it also changes the total surface area. The crushing
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ASTM E382 - 20 Standard Test Method for Determination of ...
1.1 This test method describes a method for determining the crushing strength of fired iron ore pellets and direct-reduced iron. Cylindrical agglomerates and briquettes are not covered by this test method. ... E389 Test Method for Particle Size or Screen Analysis at No. 4 (4.75-mm) Sieve and Coarser for Metal-Bearing Ores and Related Materials.
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ALTERNATIVE BINDERS TO BENTONITE FOR IRON ORE …
2.3 Determination of physical and mechanical pellet properties Size and shape of pellets: Industrially, at least 90% of spherical pellets should be between 9.0 and 16mm with minus 5mm material of no more than 5%. A close size distribution is preferred for a better permeability of the pellet bed in the firing machine in industry.
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Breakage of green iron ore pellets - ScienceDirect
Effect of pellet size. On average, the force required to fracture or crack the pellets reduced from 10.5 N for 12.5–16 mm, to 8.4 N for 10–12.5 mm and further to 5.4 N for 8–10 mm. Moisture contents of pellets contained in these sizes were within 0.2% of the moisture set for the batch, therefore nearly invariant with pellet size.
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Iron Ore Pelletizing Process: An Overview
The iron ore pelletizing process consists of three main steps: 1. Pelletizing feed preparation and mixing: the raw material (iron ore concentrate, additives anthracite, dolomite and binders are prepared in terms of particle size and chemical specifications, dosed, and mixed together to feed the pelletizing …
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