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DOI: 10.1016/j.powtec.2020.10.063 Corpus ID: 226333476; Effect of limestone and dolomite flux on the quality of pellets using high LOI iron ore @article{Prusti2020EffectOL, title={Effect of limestone and dolomite flux on the quality of pellets using high LOI iron ore}, author={Pallishree Prusti and Kashinath Barik and Nilima Dash and S. K. Biswal and B. …
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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.
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High-LOI iron ore fines are required for detailed laboratory pelleti- zation studies and are used in pellet making. The received iron ore is martite–goethitic and hematite–goethitic form of ore with high LOI content. The iron ore consists of 57.7% Fe, 6.19% SiO2, 2.69% Al2O3, 8.80% moisture and 8.85% LOI.
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Worldwide iron ore pellets production increased from 388 million tonnes in 2010 to 550 million tonnes in 2022. ... Blaine number (specific surface area, cm 2 /g) of PRM was measured using Toni prem blaine apparatus and was found to be 3040 cm 2 /g. Zeta potential test of PRM along with the fixed proposition of bentonite (0.5 pct), and …
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A Blaine number is the surface area-based parameter that is quantified with the use of the air permeability method. The technique is well-established in the cement industry. However, it has several widely recognized and important limitations. These include 2 types of cement of the same Blaine number exhibiting different characteristics in …
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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 ...
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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.
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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 ...
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The blaine number of iron ore concentrate is important for pellet feed specification which is measured by air permeability apparatus and its unit is cm2/gr, while specific surface is measured by ...
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temperatures at different times for producing oxidized pellets with high strength. The Blaine SSA of the tested iron concentrates that were treated with HPGR ranged from 849 cm2/g to 1601 cm2/g. The fineness of the concentrates was evaluated by particle size distribution, BET SSA, and lattice deformation. With the strength of pellets …
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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 for good quality …
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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 method and …
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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.
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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
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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 investigation showed that when MgO containing flux viz. pyroxenite was added, the reduction degradation index and swelling index of the pellets …
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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 ...
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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 ...
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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 characteristics …
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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 …
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The pellet chemistry of a steel plant, M/s Tata Steel Ltd (TSL) was chosen as typical composition (CaO: 1.0 %, MgO: 1.4 % and C: 1.2 %) to make the reference pellet. First, the reference pellets were made taking iron ore fines of Blaine fineness 2855 cm2/g as used in TSL, whose size fractions are given in Table 1.
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This document specifies a method to determine the fineness of iron ores in terms of specific surface area, using the manual Blaine air-permeability apparatus. This document is applicable to pellet feeds in the range of 400 cm 2 /g to …
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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 was introduced …
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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 …
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Earlier studies on oxidation of magnetite iron ore pellets have described about the influence of various parameters like partial pressure of oxygen, pellet porosity, pellet size, Blaine number and additives, i.e., bentonite, limestone and low volatile anthracite coal/coke [9,10,11,12,13]. In the present study, the change of mineral phases …
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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 …
DetailsFluxing 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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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.
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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 …
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Table 15.14 lists the typical mineral phases present in iron ore pellets, while Figure 15.16 shows two typical microstructures of pellets produced from magnetite and hematite pellet feeds. While the main bonding phase of the pellets is recrystallized Fe 2 O 3, there are some key differences in the microstructures of pellets produced from ...
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