Another characteristic that make our iron ore products unique is their high and consistent quality. ... Our iron ore pellets and fines are made from magnetite and have high iron ore content – pellets at around 67 percent concentration and fines over 70 percent. ... Number of quality parameters continuously measured in our pellet production.
The iron ore concentrate with the higher Blaine number causes problem in pellets making [1], [2]. Moreover, it requires the higher grinding energy during preparation to achieve the required Blaine fineness [7]. The iron ore concentrate with the lower Blaine number doesn't provide the sufficient strength both to the green and indurated pellets ...
In this study, the influence of three different binder compositions (bentonite and limestone (BLS), limestone and lime (LSL), and cement) and Blaine number on the …
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 …
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.
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.
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 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 …
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 ...
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 …
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 ...
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 …
In the present work, an attempt is made to optimize the pellet chemistry by developing 2 different flux pellets, viz., low basicity (B2: CaO/ SiO2 = 0.3) pellets and high basicity (B2 = 0.9 ...
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
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 …
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 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 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, …
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
In this work, a comparative study has been done to determine the effect of three different compositions of binders (bentonite and limestone (BLS), limestone and lime (LSL), and cement) and Blaine number on the properties of pellets prepared using the slime generated from the washing of Indian-origin iron ore. The compressive strength (C.S.) …
Effect of particle size on pellet quality during pellet making has also been aimed and studied along with the development of flowsheet for beneficiation of low grade iron ore. View Show abstract
The average number of drops accepted by the pellets before breaking was termed as GDSN. The green pellets were dried in an oven at 110 °C for four hours. ... the pellet was made with -350 mesh limestone and anthracite coal with same green pellet composition (Iron ore Blaine fineness was kept at 2855 cm2/g due to the above reason) as shown in ...
the Blaine number [1, 4, 5]. However, the relationship between the Blaine number and the type of mineral is not yet well studied. Moreover, the effect of shape and size distribution of minerals, as well as the number of fine particles and iron in minerals on the Blain number, has remained unknown.
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 …
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 …
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 ...
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 …
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 ...
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 …
Fluxing agents as additives are the source of basic oxides (CaO, MgO) for making of iron ore fluxed pellets. CaO and MgO neutralize the acidic oxides (SiO 2, Al 2 O 3) present in iron ore thereby maintaining a suitable slag basicity ... Blaine number of iron ore fines was measured as 2920/cm 2.g −1. It illustrates that the particle size ...
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