Influence of Binder Dosage on Granule Structure and Packed Bed Properties in Iron Ore Sintering Process

Zhou, Hao; Zhou, Mingxi; O’Dea, Damien; Ellis, Brian; Chen, Jianzhong; Cheng, M.

doi:10.2355/isijinternational.isijint-2016-298

Cited by 30 publications

(31 citation statements)

References 26 publications

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“…Venkataramana et al 19) developed a statistical model to predict bed voidage considering the spread of granule size distribution and feed specification parameters including 0.015 mm ultrafines, water content and lime content. Zhou et al 20) investigated the granule structure and packed bed properties of a mixed ore blend over a wide range of water and hydrated lime addition levels. A semi-empirical model predicting the bed voidage was developed taking the standard deviation of the granule size distribution, cohesive forces during packing and potential for granule deformation into consideration.…”

Section: Characterization Of Granule Structure and Packed Bed Propertmentioning

confidence: 99%

“…A semi-empirical model predicting the bed voidage was developed taking the standard deviation of the granule size distribution, cohesive forces during packing and potential for granule deformation into consideration. Zhou et al 20) illustrated that hydrated lime also acts as binder during granulation and can improve the packed bed permeability effectively. However, the ore blends tested did not contain magnetite concentrate.…”

Section: Characterization Of Granule Structure and Packed Bed Propertmentioning

confidence: 99%

“…Since the bed permeability is very sensitive to the bed voidage value, a more accurate prediction of bed voidage is helpful to the cold bed preparation of ore blending in industrial production. The previous semi-empirical green sinter bed voidage model by Zhou et al 20) was further modified based on the experimental results. Particular emphasis was given to considering how the characteristics of the produced granules such as their actual size distribution and potential of deformation affect the resulting bed voidage.…”

Section: Characterization Of Granule Structure and Packed Bed Propertmentioning

confidence: 99%

“…An ore blend consisting of five iron ore fines (16.7 wt% AUS1 fines, 16.7 wt% AUS2 fines, 33.3 wt% AUS3 fines, 16.7 wt% BRA1 fines, 16.7 wt% BRA2 fines) has been studied in previous work, 20) which represents a typical blend used in the Asia-Pacific region and was treated as the base blend in present study. Magnetite concentrate was introduced into the base blend at levels of 10% and 30%.…”

Section: Raw Materials and Sinter Mixturesmentioning

confidence: 99%

“…The adhering mass ratio of granules could also be calculated by mass balance of all size fractions. 9,[11][12][13][14][15][16]20) …”

Section: Partition Curve Determination For Each Particlementioning

confidence: 99%

See 4 more Smart Citations

Characterization of Granule Structure and Packed Bed Properties of Iron Ore Sinter Feeds that Contain Concentrate

Zhou

O’Dea

et al. 2017

ISIJ Int.

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Section: Characterization Of Granule Structure and Packed Bed Propertmentioning

confidence: 99%

Section: Characterization Of Granule Structure and Packed Bed Propertmentioning

confidence: 99%

Section: Characterization Of Granule Structure and Packed Bed Propertmentioning

confidence: 99%

Section: Raw Materials and Sinter Mixturesmentioning

confidence: 99%

“…The adhering mass ratio of granules could also be calculated by mass balance of all size fractions. 9,[11][12][13][14][15][16]20) …”

Section: Partition Curve Determination For Each Particlementioning

confidence: 99%

See 3 more Smart Citations

Characterization of Granule Structure and Packed Bed Properties of Iron Ore Sinter Feeds that Contain Concentrate

Zhou

O’Dea

et al. 2017

ISIJ Int.

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Flame front propagation and sinter strength properties of permeable sintering bed prepared via enhanced granulation with hydrated lime

Zhou

2020

Asia-Pacific J Chem Eng

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This paper is focused on investigating the influences of enhanced granulation with hydrated lime on the propagation of flame front and strength properties of the produced sinter in iron ore sintering. Pilot‐scale sinter pot experiments were performed at three hydrated lime levels, and the porous structures of sinter were reconstructed by high resolution X‐ray tomography. When hydrated lime increased from 0% to 2%, more permeable green bed with enlarged granule mean size and narrowed granule size distribution could be obtained, and sinter productivity increased from 37.3 to 40.7 t/m2/d while tumbler index of sinter decreased from 62.7% to 55.0%. Both the bed temperature and pressure profiles verified that hydrated lime addition fasten sintering by reduction of heat accumulation and acceleration of flame front speed in sintering bed. The three‐dimensional stress analysis based on the actual microstructures showed that more irregular sinter particles with higher porosity are obtained with higher hydrated lime due to the insufficient melt formation and coalescence during sintering. Sinter with 2% hydrated lime was much more compliant under the fixed compression, exhibiting larger potential to be deformed in locations including bridges with the small cross sections and notches with the small fillet radius.

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Effect of coating structure of granulated quasi‐fuel particles in iron ore sintering

Lai

Meng

et al. 2021

Asia-Pacific J Chem Eng

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To reduce greenhouse gas emissions, biomass fuels are used to gradually replace fossil fuels in the sintering process. Unfortunately, the sinter quality will deteriorate sharply due to too fast combustion rate when using biomass fuels. To address this problem, pregranulation proved to be an effective method. In this study, the pilot‐scale sinter pot tests were carried out to study the effect of coating structure of granulated quasi‐fuel particles on the granulation properties, flame front propagation in sintering, sinter indexes, sinter mineralogy, and pore structure. The experimental results show that when substituting coke with biomass char, the average size of the granules decreased whereas bed voidage increased due to the irregular shape and lower apparent density of granules. Pregranulation can reduce the flame front speed and increase the maximum bed temperature, thereby alleviating the deterioration of sinter quality and sinter yield. By pregranulating biomass char and 2% magnetite concentrate, the tumbler strength, sinter yield, and productivity can be increased from 44.9% to 55.0%, from 41.9% to 49.3%, and from 28.54 to 31.10 t/m2/d, respectively. The microscopic observation results show that substituting coke with biomass char for sintering decreased the content of calcium ferrite in sinter and increased sinter porosity. On the contrary, pregranulating increased calcium ferrite content in sinter and decreased sinter porosity, and thus sinter quality was improved.

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Influence of Binder Dosage on Granule Structure and Packed Bed Properties in Iron Ore Sintering Process

Cited by 30 publications

References 26 publications

Characterization of Granule Structure and Packed Bed Properties of Iron Ore Sinter Feeds that Contain Concentrate

Characterization of Granule Structure and Packed Bed Properties of Iron Ore Sinter Feeds that Contain Concentrate

Flame front propagation and sinter strength properties of permeable sintering bed prepared via enhanced granulation with hydrated lime

Effect of coating structure of granulated quasi‐fuel particles in iron ore sintering

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