Optimization of Drying and Preheating Temperatures During Pellet Induration for Utilizing Goethitic Iron Ores

Sagar, Ravi Kant; Sah, Rameshwar; Basavaraja, M.; Desai, Sangamesh; Balachandran, G.

doi:10.1007/s42461-022-00627-8

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…The consolidation mechanism of Guisha limonite can be generally divided into three steps: (1) Fe 2 O 3 grain development, (2) expansion of the grain, and (3) interconnection of the grains into a complete consolidation, which is commonly referred to as solid-phase consolidation. Many experiments have revealed that Fe 2 O 3 crystallization is a process that progresses from primary crystals to developed crystals and finally to interconnected crystals, with primary crystals typically forming at about 1150-1200 • C. At 1220-1250 • C, developed crystals form; above 1280 • C, interconnected crystals form [8][9][10]. The crystallization process is critical to the compressive strength of pellets [11].…”

Section: Introductionmentioning

confidence: 99%

Study on the Roasting Process of Guisha Limonite Pellets

et al. 2022

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In this paper, a pelletizing method has been researched to enhance the subsequent iron-making process applying Guisha limonite, with advantages including large reserves and low price. The purpose is to provide an alternative for the sinter, thus reducing the greenhouse gas emission during the iron-making process. The response surface method is used to optimize the experimental design of the pelleting process. A multivariate regression model for estimating the compressive strength of pellets was developed using Box–Behnken experimental methodology, where the relevant factors were the roasting temperature, pellet diameter, and bentonite content. The maximum influencing factors of each experimental design response are determined using analysis of variance (ANOVA). Under optimum conditions, the compressive strength of pure limonite pellets is 2705 N, similar to the response goal value of 2570.3 N, with a relative error of 5.20%. Since the high-grade iron ore resources are depleted, the comprehensive utilization of ore resources is becoming increasingly important. The aim of this paper was to provide a valuable technical foundation for lignite pellet-roasting processes in the iron and steel industries, since steel companies is increasing its imports of Guisha limonite.

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Section: Introductionmentioning

confidence: 99%

Study on the Roasting Process of Guisha Limonite Pellets

et al. 2022

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Numerical simulation of gas-solid heat transfer and moisture evaporation process in preheating shaft kiln for ferromagnesium pellets

Duan,

Ding,

Wang

et al. 2024

Therm sci

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The arc furnace is an important equipment in the production of manganese ferroalloys. In the smelting process, it produces high temperature flue gas above 700 K, which has high utilization value. During the pelleting process, moisture exists on the surface and inside of the pellets, which, if directly fed into the arc furnace, will lower the temperature of the furnace, affecting the production, and will also cause the pellets to burst, resulting in pressure fluctuations in the furnace and other hazards. The preheating shaft kiln reduces the moisture content of the pellet while preheating the pellet by utilizing high temperature flue gas. In this paper, through the establishment of porous media and shrinking core coupling mathematical model, to achieve the prediction of the heating and drying process of the pellets of various particle sizes, which is in good agreement with the production monitoring data. The results show that 9~11 mm pellets have the best preheating effect in terms of tail gas temperature, pellet temperature and preheating time.

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Optimization of Drying and Preheating Temperatures During Pellet Induration for Utilizing Goethitic Iron Ores

Cited by 2 publications

References 12 publications

Study on the Roasting Process of Guisha Limonite Pellets

Study on the Roasting Process of Guisha Limonite Pellets

Numerical simulation of gas-solid heat transfer and moisture evaporation process in preheating shaft kiln for ferromagnesium pellets

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