Characterization and drying kinetics of iron ore pellet feed and sinter feed

Pinto, T.C. Souza; Souza, Amarílis Severino e; Batista, J. N. M.; Sarkis, A.M.; Filho, Laurindo de Salles Leal; Pádua, Thiago Faggion de; Béttega, Rodrigo

doi:10.1080/07373937.2020.1747073

Cited by 11 publications

(7 citation statements)

References 32 publications

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“…In order to humidify the material, distilled water was added to portions of 200 g of dry ore, until reaching the desired nominal moisture content of 0.11 kg water/kg dry solids (dry basis) [27].…”

Section: Sample Characterization and Preparationmentioning

confidence: 99%

“…A final moisture level of 0.05 kg water/ kg dry solids for both td and Es was defined in order to meet the minimum moisture content desired for iron ore, since lower values can lead to high dust generation, product loss, and difficulties in handling the material [41]. Furthermore, this value is above the critical humidity found in tests for other dryers [27] and was used as a reference for drying to occur mainly within the constant rate period. This value is also below the TML usually found for iron ore and hence meets the moisture content required for shipping operations [4,7].…”

Section: Experimental Design and Statistical Analysismentioning

confidence: 99%

“…In order to obtain the value of td, the experimental data of the dimensionless moisture content over time were fitted using a kinetic model (Equation 9) [27,42]. The drying time to 0.05 kg water/kg dry solid was then estimated using the equation of the fit.…”

Section: Experimental Design and Statistical Analysismentioning

confidence: 99%

“…For an initial moisture content of 6.95% (wet basis), it was observed that the degree of particle drying increased from 48.6 to 82.5% with increase of the air temperature from 100 to 400 °C. Souza Pinto et al [27] investigated the characteristics and drying kinetics of iron ore pellet feed and sinter feed. This study showed that for a drying operation using a fixed bed with air temperature of 400 °C, the removal of moisture decreased around 60% when the operation involved the final drying stage (falling rate period).…”

Section: Introductionmentioning

confidence: 99%

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Energy analysis of the convective drying of iron ore fines

Souza

Sarkis

et al. 2023

CI&CEQ

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Drying operations in iron ore processing plants have a particularly high energy demand due to the massive solid flow rates employed in this industry. A 33 full-factorial design was applied to investigate the effects of air temperature, airflow velocity, and solids load on the drying time and the specific energy consumption (SEC) of the convective drying of iron ore fines in a fixed bed. The results demonstrated that each drying air condition was associated with an optimal solids load that minimized the SEC. A load of 73 g (bed height of about 0.8 cm) was identified and validated as the optimal condition in terms of energy consumption for the configuration with the highest air temperature (90?C) and airflow velocity (4.5 m/s). This condition resulted in a drying time of 29.0 s and a corresponding SEC of 12.8 MJ/kg to reduce the solids moisture content from 0.11 to a target of 0.05 kg water/kg dry solids. The approach presented here for identifying the optimum values for the process variables should assist in the design and operation of energy efficient convective dryers for iron ore fines.

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Section: Sample Characterization and Preparationmentioning

confidence: 99%

Section: Experimental Design and Statistical Analysismentioning

confidence: 99%

Section: Experimental Design and Statistical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Energy analysis of the convective drying of iron ore fines

Souza

Sarkis

et al. 2023

CI&CEQ

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“…Iron ore pellet feed is an important upgraded product, agglomerated as a pellet material, which is used as raw material in steel manufacturing. In order to meet the specifications of the blast furnace process for steel production regarding trace elements content, upgrading steps are required (Souza Pinto et al, 2021). Among others steps, flotation has been essential for intermediate and low-grade iron ore upgrading prior to agglomeration.…”

Section: Introduction and Objectivesmentioning

confidence: 99%

Novel XMC Biopolymer to Improve Iron Ore Reverse Cationic Flotation Performance

Costa¹,

Ribeiro²,

Resende³

et al. 2022

Floresta Ambient.

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Iron ore pellets are raw materials used by the iron and steel industries. In these applications, flotation process has been used for increasing the iron content. In this process, starch is normally used as a depressant and amine as a collector. The main objective of this study was to compare the starch with different alternatives of biopolymers. Such depressant was developed in the US Patent granted at number 9,421,556 named XMC. The best XMC produced in this work (XMC SB) shown iron content at tails fraction (RJ) and at concentrate fraction (CO) of 39.4% and 67.2%, respectively while starch shows 36.5% and 67.3%, respectively, at the same SiO2 level. Additionally, mass recovery was 63.3% and 65.0%, respectively for XMC SB and starch, and metallic recovery were 75.2% and 79.0%, respectively for XMC SB and starch. Therefore, the major advantage of XMC as iron ore depressant will be regard its sustainability.

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