Experimental Study on the Physical Properties of Iron Ore Granules Made from Australian Iron Ores

Li, Chengzhi; Moreno-Atanasio, Roberto; O’Dea, Damien; Honeyands, Tom

doi:10.2355/isijinternational.isijint-2018-508

Cited by 15 publications

(5 citation statements)

References 36 publications

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“…In addition to chemical properties, physical properties of bulk density, moisture and fractions of iron ore particle sizes are important parameters for iron ore quality 39,40 . For example, the high density with low porosity www.nature.com/scientificreports/ can slow down the flame front speed, impacting the combustion efficiency and the strength of the formed sinter 41 .…”

Section: Discussionmentioning

confidence: 99%

Influence of iron ore properties on dioxin emissions during iron ore sintering

Zhou

Strezov

Evans

et al. 2022

Sci Rep

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Iron ores are principal input materials for iron and steel-making industries. Quality of iron ores is one of the critical parameters for formation of environmental pollutants related to the steel-making process. Dioxins are identified as one of the most toxic pollutants emitted during ironmaking, specifically during the sintering process. This study applied four types of iron ores and analyzed their moisture, density, particle size distribution and element concentrations to investigate their effect on the dioxin formation during sintering. Each type of iron ore was processed in a sinter pot grate. During each processing route, exhausted dust and generated sinter products were collected and subjected to PCDD/F and PCB analysis. Statistical analysis was applied to assess correlations between properties of iron ores and exhausted dioxin emissions, identifying key contributors to dioxin formation during sintering process. Results showed that Fe in iron ores was positively and significantly related to PCB 114 formation in dust and confirmed its co-catalytic effect on dioxin formation. Concentrations of Al, Ti and Cl in iron ores greatly increased PCDD/F and PCB emissions in the sintered products compared to dioxins in dust samples. The S levels and density of iron ores were highly related to the increasing PCDD/F and PCB emissions in both sinter and dust samples. By contrast, concentrations of Si in iron ores played a significant role in decreasing PCDD/F and PCB emissions in both sinter and dust samples. This study also confirmed the optimum size (< 1 mm–2.59 mm) for iron ores, which helps reduce dioxin emissions without affecting the quality of iron and steel-making products.

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Section: Discussionmentioning

confidence: 99%

Influence of iron ore properties on dioxin emissions during iron ore sintering

Zhou

Strezov

Evans

et al. 2022

Sci Rep

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“…The mixture was first pre-mixed for 2 minutes followed by addition of the desired amount of water and then the granulation was continued for 3 minutes. The particle size distribution (retained mass%) and apparent density of the green feed were measured according to the procedure described by Ellis et al 24) and Li et al 25) These measured values are presented in Tables 3 and 4 respectively.…”

Section: Raw Materials and Methodsmentioning

confidence: 99%

Iron Ore Sintering in Milli-Pot: Comparison to Pilot Scale and Identification of Maximum Resistance to Air Flow

Singh¹,

Zhang

et al. 2021

ISIJ Int.

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In the iron ore sintering process, the resistance to air flow is a major factor in deciding the flame front speed, which influences the sinter productivity and quality. In this work, pressure drop during sintering and the resistance to air flow was investigated in milli-pot sintering for different coke rates. The sintering experiments were conducted in a milli-pot (diameter 53 mm, height 400 mm) and pressure and temperature were measured at the same locations in the bed by four taps located equidistant to each other. The yield of sinter product was measured following a modified drop test and the mineralogy of the sinter product was analysed. The results from milli-pot sintering were then compared to the reported results from standard pilot-scale sintering, and it was found that the lower half of the milli-pot bed gave a reasonable representation of the pilot-scale sintering process. The results of sinter mineralogy, yield and productivity of the lower half of milli-pot at 5.5-8.0% coke rate were found to be similar to pilot-scale sintering tests at a corresponding coke rate from 3.5 to 5.5%. The maximum resistance to air flow in the bed was found to be in the region between the leading edge of the flame front at ~100°C and the trailing edge of the flame front at ~1 200°C. This suggests that the maximum resistance to air flow includes the effect of de-humidification and combustion in addition to the high temperature "flame front" region usually defined at temperatures above 1 100°C or 1 200°C.

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“…The composition and size distribution are referred to elsewhere. 19 Coke can be produced in coke oven batteries using coal as the raw material based on the decomposition (pyrolysis) of coal that occurs inside the oven. 20 As a result, the products from the coke oven batteries include coke and COG.…”

Section: Modeling and Simulation Of Steel Plant With Coke Oven Batteriesmentioning

confidence: 99%

Study of lime flow rate on calcium looping carbon capture for steel plant

Sungsook,

Srinophakun

2024

Ironmaking & Steelmaking: Processes, Products and Applicati

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Calcium looping carbon capture was simulated for a steel plant and three fuel cases were studied: coal, coke, and half coal/coke. The steelmaking production was about 1.2 t of liquid steel per hour at >99.85% purity by weight. This study evaluated the effect of carbon capture efficiency and raw material cost on the lime flow rate in the calcium looping section. Increasing the lime feeding flow rate achieved higher efficiency but at a higher cost. The overall captured efficiency was higher than the flue gas captured efficiency at a low lime feeding flow rate but lower at a high lime feeding flow rate. Then, the overall captured efficiency tended to decrease at high lime feeding flow rate because raw materials were used too much for carbon capture and caused overall carbon dioxide emission more than the content of captured carbon dioxide in the product stream. Coal as fuel plays an important role in carbon emission reduction as one of the raw materials, along with the utility cost and the raw material cost in calcium looping section.

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Experimental Study on the Physical Properties of Iron Ore Granules Made from Australian Iron Ores

Cited by 15 publications

References 36 publications

Influence of iron ore properties on dioxin emissions during iron ore sintering

Influence of iron ore properties on dioxin emissions during iron ore sintering

Iron Ore Sintering in Milli-Pot: Comparison to Pilot Scale and Identification of Maximum Resistance to Air Flow

Study of lime flow rate on calcium looping carbon capture for steel plant

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