Effect of Magnetite Concentrate Particle Size on Pellet Oxidation Roasting Process and Compressive Strength

Zhang, Hao; Bai, Kaikai; Liu, Wenguo; Chen, Yanbiao; Yuan, Yaqiang; Zuo, Haibin; Wang, Jingsong

doi:10.2355/isijinternational.isijint-2022-121

Cited by 4 publications

(2 citation statements)

References 20 publications

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“…In addition, the pelletized ore undergoes a number of handling, transport, stacking, and movement processes before and after entering the blast furnace. These processes are subject to a variety of severe mechanical forces such as collision, impact, compression, and friction [4]. These mechanical forces can cause some pellets to break up and produce fines, which can affect furnace operation and production targets.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Influence of Drying and Preheating Parameters on the Roasting Properties of Limonite Pellets

Chen,

Zhou

2024

Minerals

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In this experiment, a pellet preparation method was investigated to study the drying, preheating, and roasting properties of limonitic iron ore from a plant in Yunnan. The aim was to improve the subsequent iron-making process of limonitic iron ore and make it a substitute for sintered ore. This substitution would reduce the amount of blast furnace slag in the iron-making process. Bentonite is commonly used as a primary binder in many pelletizing plant operations. However, its excessive usage leads to a higher risk of slagging and coking in the furnace. In this paper, we aim to decrease the quantity of bentonite added, enhance the iron content in the pellets, and reduce impurities to improve the grade of limonite pellets. The results show that the optimal drying, preheating, and roasting temperatures of limonite pellets are 200 °C, 700 °C, and 1250 °C, respectively, and the optimal roasting time is 20 min, when the diameter of the pellets is 8–13 mm. The compressive strength of limonite pellets with the addition of 1.5% bentonite was the highest, meeting the demands of a general blast furnace, based on which the iron grade of limonite pellet ore was increased by 10.63%.

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Section: Introductionmentioning

confidence: 99%

A Study on the Influence of Drying and Preheating Parameters on the Roasting Properties of Limonite Pellets

Chen,

Zhou

2024

Minerals

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“…However, low-grade ores often contain numerous impurities, resulting in lower pellet strength when using limonite. Moreover, pelletized ores undergo multiple handling, transportation, stacking, and movement processes before and after entering the blast furnace, experiencing various harsh mechanical forces such as collisions, impacts, compression, and friction [ 13 ]. These mechanical forces can cause the breakage of some pellets, leading to the generation of fines and affecting furnace operation and production indicators.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Compressive Strength of Biomass–Humic Acid Limonite Pellets Using Artificial Neural Network Model

et al. 2023

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Due to the detrimental impact of steel industry emissions on the environment, countries worldwide prioritize green development. Replacing sintered iron ore with pellets holds promise for emission reduction and environmental protection. As high-grade iron ore resources decline, research on limonite pellet technology becomes crucial. However, pellets undergo rigorous mechanical actions during production and use. This study prepared a series of limonite pellet samples with varying ratios and measured their compressive strength. The influence of humic acid on the compressive strength of green and indurated pellets was explored. The results indicate that humic acid enhances the strength of green pellets but reduces that of indurated limonite pellets, which exhibit lower compressive strength compared to bentonite-based pellets. Furthermore, artificial neural networks (ANN) predicted the compressive strength of humic acid and bentonite-based pellets, establishing the relationship between input variables (binder content, pellet diameter, and weight) and output response (compressive strength). Integrating pellet technology and machine learning drives limonite pellet advancement, contributing to emission reduction and environmental preservation.

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Preheating Characteristics of Magnetite Pellets Under Microwave Irradiation

Tian,

Peng,

Fan

et al. 2024

JOM

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Effect of Magnetite Concentrate Particle Size on Pellet Oxidation Roasting Process and Compressive Strength

Cited by 4 publications

References 20 publications

A Study on the Influence of Drying and Preheating Parameters on the Roasting Properties of Limonite Pellets

A Study on the Influence of Drying and Preheating Parameters on the Roasting Properties of Limonite Pellets

Prediction of Compressive Strength of Biomass–Humic Acid Limonite Pellets Using Artificial Neural Network Model

Preheating Characteristics of Magnetite Pellets Under Microwave Irradiation

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