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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 ...
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 …
Pal J, Ghorai S, Agarwal S, et al. Effect of blaine fineness on the quality of hematite iron ore pellets for blast furnace. Miner Process Extr Met Rev. 2015;36(2):83–91. [16] Mandal AK, Sarkar A, Sinha OP. Utilization of lime fines as an effective binder as well as fluxing agent for making fluxed iron ore pellets.
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 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 ...
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 …
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.
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 …
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 …
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.) …
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.
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 ...
A easy process where the end product is placed on a base plate.The force is then acted upon by the pressure plate. Readings are obtained digitally and noted as and when the pellet breaks.Unit =kg/ pellet. 3) Blaine Number Again a simple process where weights are calculated and are put in the formula to calculate the Blaine number.
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% ... Blaine number cm2/gm (Pellet plant 1) 2600 123 Trans Indian Inst Met (2019) 72(10):2599–2611 2601. 4 ...
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 …
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
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
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 ...
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 ...
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, …
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 ...
The mineralogy of iron ore affects the GCS of the pellets. The Blaine number of iron ore concentrates increases with increasing LOI because of the presence of goethite and kaolinite. The current modified proposed model of the self-preserving curve has become more accurate and adaptable for predicting the pellet size distribution after ...
Effect of bentonite ratios on the quality of green pellets with various Blaine numbers of the mixture: (a) Blaine number of 1726.34 cm 2 /g, (b) Blaine number of 1973.09 cm 2 /g. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)
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].
To maximize the iron values from the slimes and tailings, flotation process may be adopted in future. It provides the hydrophobic characteristic on the surface of the particles, which has negative impact on pelletisation. Iron ore concentrate having high LOI, high Blaine and hydrophobic surface particles are taken a feed for making pellets.
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 …
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 …
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 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 …