It is considered as a challenging task for beneficiation industries to handle iron ore concentrate having high LOI and a high Blaine number for pelletization. High LOI hampers the pelletization in the induration stage due to the formation of cracks in the pellet by forming high-pressure steam.
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 ...
You've already forked sbm 0 Code Issues Pull Requests Packages Projects Releases Wiki Activity
The Indian hematite iron ore concentrate maintains high LOI because of the presence of kaolinite, goethite and gibbsite even after beneficiation process. As this ore is in fragile nature, the Blaine number of pellet feed material is high. To maximize the iron values from the slimes and tailings, flotation process may be adopted in future.
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 …
1. Introduction. Pelletization is a clean and essential method of producing materials for iron-making due to its low energy consumption and minimal pollutant emissions [[1], [2], [3]].With the "carbon peak and neutrality" background, increasing the proportion of pellet feed in charge can effectively reduce carbon emissions in Chinese …
The overall Blaine number of blended material was 2200 cm 2 /g. There is no available literature to utilize iron ore slimes directly through the pelletization route. …
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 ...
It is important to mention that iron ore fines, specifically the pellet feed (D 80 < 106 mm [20]), are the raw material for the production of iron ore pellets ("green balls"), whose particle ...
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 ...
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 ...
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 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%.
Article. Modelling and estimating the Blaine number of iron ore concentrate by response surface methodology and Monte Carlo simulation. December 2023. …
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 …
to 1470 cm2/g, and then declines with an increase in Blaine number 1800 cm2/g. In pellets made with LSL and cement binders, the C.S. value constantly grows as the Blaine ... Keywords Iron ore ...
The moisture content in green pellets with 0.5% bentonite was varied between 7.3% and 9.4%. By increasing the bentonite dosage up to 1.5%, the moisture range suitable for balling could be expanded up to 10.5%. Results from individual micro-balling batches are reported below.
Based on the values of F-value and p-value, the B 9 is the most effective parameter influencing the Blaine number of iron ore concentrate. According to Table 2, the B 9 is the representative of the Blaine number of particles belonging to the particle size …
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 typical properties of the iron ore pellets are given in Tab 1. Process technology. There are four stages involved in the production of iron ore pellets. These stages consist of (i) raw material preparation, (ii) formation of green balls or pellets, (iii) induration of the pellets, and (iv) cooling, storage and transport of pellets.
The RSM-I-optimal predicted responses with a coefficient of determination (R 2) of 0.89 for CCS and 0.91 for AP of iron ore pellets. Optimal conditions were Blaine …
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. This means they have lower impact on the environment than competing pellets and products such as sintered hematite fines. ... Number of quality parameters continuously measured in our ...
Highlights. •. Proposing a novel strategy for modelling the Blaine number of iron ore concentrate. •. Modelling the Blaine number using Response surface method …
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. …
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 ...
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.
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 result shown that cold compression strength of the pellets containing from 1.06 to 18.45 mass% slag was higher values than 200 kg/p, hence, the pellet was able to charge the pellets into the ...
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 …
Improved physical strength & metallurgical properties make iron ore pellets an alternative feed material for blast furnace in comparison to calibrated lump ore (CLO), considering a sustainable utilization of high-grade iron ore resources. ... (LOI) and Blaine number of the pellet feed concentrate above the acceptable limit [20]. Because of this ...
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 cm2/g) but, reduction degradation index was found to be very poor for the given ore.
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.
2.1 Materials and Methods. Iron ore slimes from Bailadila-5 (India) mines were used for the present study. The specific surface area (also known as Blain number) of as received slime was 821 cm 2 /g. Initially, the slimes were subjected to beneficiation by gravity separation and magnetic separation, followed by wet grinding and filtration to …
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 ...