A case study of pellet size fraction influence on pelletizing operation

Athayde, Maycon; Nunes, Sergio Fernandes; Bagatini, Maurício Covcevich

doi:10.1080/08827508.2017.1423296

Cited by 12 publications

(5 citation statements)

References 1 publication

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“…Achieving the right pellet size is crucial for its suitability in counterflow reactors, which involves considering factors such as moisture levels, addition of essential elements (like limestone, coal/coke, dolomite, and binders), and ensuring the proper chemical composition for an effective firing process [2]. Central to this refining process is the roller screen, an indispensable equipment used to adjust the sizing of green pellets, ensuring they meet the requirements for iron burden in steelmaking plants [2][3][4]. Initially, pelletizing plants employed vibrating screen technology, resulting in high pellet degradation rates, which diminished process efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…Proper screening enhances gas flow during the firing process, reducing energy consumption, dust generation, and enhancing pellet quality [8]. A successful screening process involves eliminating undersized and oversized particles to avoid adverse impacts on furnace and balling productivity [3]. Notably, pelletizing units using drum technology encounter higher recirculating loads, necessitating efficient screening to maintain productivity [9,10].…”

Section: Introductionmentioning

confidence: 99%

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The impact of new technologies on the iron ore screening flowsheet

Andrade,

Beaudin,

Tremblay

et al. 2024

Metall. Res. Technol.

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The iron ore screening process plays a pivotal role in determining the dimensions of pellets that enter the firing process of a pelletizing plant. The particle size distribution resulting from this process significantly influences the gas flow permeability within the induration furnace. This paper investigates the latest developments in screening technology, highlighting advancements that contribute to elevated levels of screening efficiency and enhanced plant productivity. The discussion turns around how these technological innovations pave the way for achieving the objective of producing high-quality iron ore pellets with minimal energy consumption, thereby improving the overall performance of the plant. The paper offers a comprehensive overview of the screening process flowsheet, encompassing these cutting-edge technologies, associated process parameters, and benefits quantified through DEM simulations. Moreover, it examines the consequential impact on greenhouse gas (GHG) emissions, providing a holistic perspective on the environmental implications of these advancements.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The impact of new technologies on the iron ore screening flowsheet

Andrade,

Beaudin,

Tremblay

et al. 2024

Metall. Res. Technol.

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show abstract

“…It means that at the same time, fine particles move from the top layer to the bottom layer and the larger particles move from the bottom layer to the top layer. A probability event of undersized pellet achieves the gap opening (3), where in this step, the particles closer in dimension to the gap opening will touch the rolls surface, being able to be accordingly classified. Finally, the separation/classification process (4) after the contact of the fine particles to the gap opening and the separation or classification process takes place.…”

Section: Mechanisms Of Classificationmentioning

confidence: 99%

“…Therefore, to adjust green pellets sizing to serve as iron burden, a fundamental equipment, the roller screen, is used between the balling disk/drum circuits and the induration furnace to remove the undesirable out-of-spec sizes for the induration process. It is well established that the fired pellet size distribution affects the mechanical resistance with consequent impact in the metallic iron production in the steelmaking plants [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…This undesirable scenario reduces the induration furnace and balling productivity. Athayde et al [3] demonstrated the impact of different pellet size fractions on performance of operation, improvements on the fired pellets, less fines generation during handling and superior metallurgical behavior during the reduction process, resulting in the production of direct reduction iron (DRI) that consequently add more value to the economic performance of the electric arc furnaces (EAF). A good screening performance is even more important for the pelletizing units using the drum technology for the pellet feed agglomeration step since this technology normally processes a higher quantity of recirculating load for the drums, between 150 to 300% comparatively to 20-30% of recirculating load for the circuits using disks.…”

Section: Introductionmentioning

confidence: 99%

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Impact of key parameters on the iron ore pellets roller screening performance

Andrade¹,

Beaudin²,

Athayde³

2022

Metall. Res. Technol.

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The roller screening process is an important step in the iron ore pellets production. This step is intrinsically linked to the balling production and the induration machine. Improvements to the equipment performance not only promotes benefits to the plant’s productivity, but also in the final product’s quality. Several parameters influence the equipment’s performance, impacting directly or indirectly the screening ratio (ton/m2 of open screen area). The objective of this work is to provide information regarding the key parameters influencing the roller screening performance through practical expertise and literature review, due to the lack of studies related to this important equipment. It is a review manuscript describing the screen variables and its impact on the iron ore pelletizing process.

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Optimized Prediction Model for the Granulation Effectiveness of Sintering Mixtures

Dai

Fan

Huang

et al. 2023

steel research int.

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The optimization model is proposed on the basis of the Litster's granulation model for the prediction of the granulation effectiveness of the sinter feed. Formulas are proposed to calculate parameters for the adhesive layer of the granules, including its mass‐averaged particle size and the water saturation. Based on small‐scale granulation and sieving experiments, a functional correlation is established that relates the granules properties to the distribution coefficient curve, confirming the validity of the model. The prediction of model is discussed with adhesive layer boundary conditions of −0.25, −0.5, and −1.0 mm, and when the boundary is −0.5 mm, the relative error is minimal. The optimization of the distribution coefficient curve based on the binomial interpolation method can make the model achieve a hit rate of 92.9%. Based on this model, the granulation effectiveness of the mixtures could be evaluated.

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A case study of pellet size fraction influence on pelletizing operation

Cited by 12 publications

References 1 publication

The impact of new technologies on the iron ore screening flowsheet

The impact of new technologies on the iron ore screening flowsheet

Impact of key parameters on the iron ore pellets roller screening performance

Optimized Prediction Model for the Granulation Effectiveness of Sintering Mixtures

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