The high-grade iron ore fines contain 64% Fe, 2.25% LOI, and Blaine number 2975 cm²/g, whereas iron ore slimes contain 52.45% Fe, 5.60% LOI, and Blaine number 7046 cm²/g. Pellets were produced ...
The RSM-I-optimal predicted responses with a coefficient of determination (R2) of 0.89 for CCS and 0.91 for AP of iron ore pellets. Optimal conditions were Blaine no. = 1668 cm2/g, 1250 °C firing temperature, PPGD value 90 no/mm2, SPGD value 250 no/mm2, and HPGD value 490 no/mm2, with 4.5 KN CCS 27%.
production of good quality pellets. Coarser Blaine number does not impart strength and swelling at higher temperature. While finer Blaine offers strength, it decreases reducibility [2]. During the pelletization process, the pellet 's properties are based upon bonding phases and the amount of oxides in the ore [3].
Blast furnace and direct reduction unit of iron and steel making is a very common process to utilize the iron ore in India. Due to the scarcity of high-grade iron ore, inferior grade iron ore is ...
The results showed improved properties of iron ore pellets at an optimum Blaine number (2150 cm2/g) but, reduction degradation index was found to be very poor for the given ore. Further ...
Blaine fineness is one of the most important parameters in pelletising. While the lower Blaine fineness does not provide sufficient strength to the both green pellet and indurated pellet, excessively high Blaine fineness causes problem in pellet making. Optimum Blaine fineness of iron ore in the range of 1700–2250 cm2/g is usually used …
Editors select a small number of articles recently published in the journal that they believe will be particularly interesting to readers, or important in the respective research area. ... Blaine array (1312/1678 cm 2 /g), Iron Ore pellets were fired at 1250 °C/1300 °C, showing higher C.C.S. than the Iron Ore No.2 pellets (Blaine 1989/ ...
The high-grade iron ore fines contain 64% Fe, 2.25% LOI, and Blaine number 2975 cm²/g, whereas iron ore slimes contain 52.45% Fe, 5.60% LOI, and Blaine number 7046 cm²/g. Pellets were produced ...
This study corroborates that the iron ore mineralogy has significant effects on green pellet growth and its properties by both experimental and mathematical arguments. In this context, three iron ore samples with different loss on ignition (LOI): 2.64, 4.85 and 9.19 wt.% were taken. The mineralogical differences were investigated through …
[Show full abstract] first with an increase in Blaine number from 900 to 1470 cm2/g, and then declines with an increase in Blaine number 1800 cm2/g. In pellets made with LSL and cement binders ...
A relatively large number of units have been or are being installed in iron ore pellet feed over the last few years throughout the world, in various circuits of single pass or closed circuit in ...
This document concerns one of a number of test methods that have been developed to measure various characteristics of iron ores. This method was developed to provide a uniform procedure, validated by collaborative testing, to facilitate comparisons of tests made in different laboratories.
Dear Sir,How a BLAINE NUMBER is defined in Pellet making technology.Regards.A.Banerjee
The Blaine number of iron ore concentrate is a key parameter in the iron and steel chain, especially pelletizing. In this study, a novel and comprehensive strategy …
Blaine specific surface area (SSA) is an essential physical property of iron concentrate and is availably improved by a high-pressure grinding roller (HPGR) to enhance the pelletability and the qualities of oxidized pellets. In this study, the four concentrates with various SSA were obtained by HPGR treatment to produce the oxidized pellets. The …
Basic oxygen furnace slag (BOF slag) contains high amount of useful oxides such as CaO, MgO, SiO 2, etc., therefore, a solution of the slag recycling would be used as a flux in pelletizing process.
At times, it becomes difficult to maintain required Blaine number (1800-2200 cm2/gm) with change in iron ore characteristics. Lower Blaine number means coarser material and difficulty in green ball formation & its breakage. However, it is reported that Blaine number beyond 2200 cm2/gm also does not contribute
Despite its small size, the axis of the heavy cast iron frame on which the TensileMill CNC MINI slide on linear rails very smoothly. Its exceptional machining capability is provided by high powered servos and a 24,000 RPM ISO20 spindle. ... A Blaine number is the surface area-based parameter that is quantified with the use of …
Cold compressive strength (CCS) and apparent porosity (AP) of pellets are essential properties regarding the burden of blast furnaces. The optimal required values for industries are 2.5 KN CCS and 21% AP. Blaine fineness and firing temperature are the decisive parameters analyzed here. During firing, microstructure phases such as silicate, …
The pellets were prepared by blending iron ore fines (64% Fe, 2.25% LOI, and Blaine number = 2975 cm 2 /g) and slimes (52.45% Fe, 5.60% LOI, and Blaine number = 7064 cm 2 /g) generated from the beneficiation plant. The utilization of slimes replaces the external binder addition during pellet making.
The compressive strength increases from 600 to 1870 N·pellet−1 for preheated pellets and increases from 2530 to 4270 N·pellet−1 for fired pellets when SSA increased from 849 cm2/g to 1601 ...
The results showed improved properties of iron ore pellets at an optimum Blaine number (2150 cm2/g) but, reduction degradation index was found to be very …
In this work, the effect of high Blaine fineness (2700–3250 cm²/g) on the pellets properties has been studied and the optimum parameters to make it usable for blast furnace have been examined ...
In this study, a novel and comprehensive strategy was introduced for modelling and estimating the Blaine number of iron ore concentrate by using the …
15.1. Introduction. Iron ore lump, sinter, and pellets comprise the main burden of modern blast furnaces. However, sinter and pellets are now the dominant blast furnace burden, because the natural lump supply has declined dramatically due to depletion of the world's high-grade competent iron ore resources.
DOI: 10.1016/j.apt.2023.104259 Corpus ID: 264417108; Modelling and estimating the Blaine number of iron ore concentrate by response surface methodology and Monte Carlo simulation
The firing of pellets at 1350 °C provides enough strength (C.C.S.), as shown in Figure 3 C.C.S. of these pellets is a little lower, in value, than the pellets fired at 1250 °C, of both Iron Ore and 2 pellets of respective Blaine fineness (1312–1678–2425–3218 cm 2 /g of Iron Ore and 1989–2311–2879–3461 cm 2 /g …
[1][2][3] It is generally agreed that the pellets would obtain superior quality when the specific surface area and mass fraction of − 0.074 mm particle size of iron ore concentrates respectively ...
Based on the raw material ratios and Blaine numbers used in feed pellet production, a mixture comprising 65 wt% concentrate A and 35 wt% concentrate B underwent pretreatment using a high-pressure grinding roller (HPGR) to attain a Blaine number of 1973.09 cm 2 /g. The detailed HPGR process is elaborated in the …
All the raw materials including iron ore, Kimberlite, bin-der, etc. were kept in the air oven at 105 C for minimum 12 h before carrying out pelletization studies. To under-stand relation with newly developed binder with specific surface area (Blaine number) for preparation of green pellets, iron ore concentrate with different surface area
The results showed improved properties of iron ore pellets at an optimum Blaine number (2150 cm(2)/g) but, reduction degradation index was found to be very poor for the given ore. Further investigation showed that when MgO containing flux viz. pyroxenite was added, the reduction degradation index and swelling index of the pellets were improved ...
The Blaine number (cm2/g) of the fines is an essential parameter in defining the quality of the pellets. The Blaine number of the fines influences the overall reactivity, …
In this work, the effect of high Blaine fineness (2700–3250 cm 2 /g) on the pellets properties has been studied and the optimum parameters to make it usable for blast furnace have been examined. 0.3 …
crushing strength (CCS) of iron ore pellets varies widely from as low as 80 Kgf / pellets to as high as 350 Kgf /pellets depending upon the input material quality and the process variables. The most preferred range of CCS of iron ore pellets is 180-240 Kg f / pellets which were normally found in the proportion of 35-40% at the plant.
The optimum green pellet properties are obtained with iron ore fines with a Blaine number 1800 cm 2 /g using Cement as binder material. They show a high C.S. …
In this study, a novel and comprehensive strategy was introduced for modelling and estimating the Blaine number of iron ore concentrate by using the particles physical properties (particles size distribution and shape)-based Response Surface …
The compressive strength (C.S.) value of pellets made with the BLS binder increases first with an increase in Blaine number from 900 to 1470 cm2/g, and then declines with an increase in Blaine ...
From the above it is clear that to achieve better reducibility of iron ore pellet, the optimum individual parameters are; Induration temperature: 1275 °C, size of lime stone fines: …
