Effect of mechanical activation on carbothermal reduction of chromite with graphite

Apaydin, Fatih; Atasoy, Ahmet; Yıldız, Kenan

doi:10.1179/000844311x12949291728014

Cited by 13 publications

(2 citation statements)

References 15 publications

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“…Within the scope of the first category, Ding et al found that heat treatment can improve the reducibility of the chromite ore, which could be possibly attributed to the fact that heat treatment altered the microstructure of the chromite ore grains . Apaydin et al investigated the effect of mechanical activation on the carbothermic reduction of chromite ore and it was found that the activation procedure led to amorphorization and structural disordering in chromite ore, which accelerated the reduction degree . Compared with the methods in the first category, more attempts have been made in the second one.…”

Section: Introductionmentioning

confidence: 99%

“…[4] Apaydin et al investigated the effect of mechanical activation on the carbothermic reduction of chromite ore and it was found that the activation procedure led to amorphorization and structural disordering in chromite ore, which accelerated the reduction degree. [5] Compared with the methods in the first category, more attempts have been made in the second one. Katayama et al investigated the effect of addition of chlorides, carbonates, fluorides, and borates on the reduction of chromite ore, and it was found borates had the strongest promoting effect on the reduction, which was attributed to the fact that borates facilitated the diffusion of ionic species and the grain growth of metal produced.…”

Section: Introductionmentioning

confidence: 99%

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Thermal Analysis Study on the Carbothermic Reduction of Chromite Ore with the Addition of Mill Scale

Yang

Ökvist³

et al. 2015

steel research int.

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This paper presents a fundamental study on the carbothermic reduction of chromite ore with the addition of mill scale, which forms the basis for designing an alloying precursor, “chromite ore + mill scale + carbon,” for direct chromium alloying. The reduction of chromite ore by petroleum coke with or without the addition of mill scale is investigated by Thermogravimetric Analysis (TGA) under non‐isothermal conditions (from room temperature to 1823 K) in the argon atmosphere; the fractional reduced samples were characterized by SEM/EDS and XRD analyses. The experimental results show that the mill scale in the alloying mixture is reduced to high active iron first and disseminated around the chromite ore particles; the reduction of chromite ore is enhanced with the addition of mill scale especially at temperatures higher than 1623 K, and the enhancing effect increased with increasing mill scale addition. The enhancing effect is attributed to the presence of molten Fe–C alloy in the vicinity of chromite ore, which can decrease the thermodynamic activity of chromium by having chromium in situ dissolve into the melt.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal Analysis Study on the Carbothermic Reduction of Chromite Ore with the Addition of Mill Scale

Yang

Ökvist³

et al. 2015

steel research int.

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Mechanochemistry in Technology: From Minerals to Nanomaterials and Drugs

Baláž

Bujňáková

2014

Chem Eng & Technol

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Mechanochemistry, a branch of solid-state chemistry, analyzes processes which can occur in solids due to the application of mechanical energy. This energy is supplied by high-energy milling. The mechanochemical approach belongs to the group of procedures that intensify the course of processes by producing various surface and bulk defects in treated solids. The accumulated energy acquired by milling is utilized in subsequent processes. In principle, the potential of mechanochemistry can be applied in cases, where the economic demand, the high temperatures as well as wet processes are under consideration. Several applications of mechanochemistry will be illustrated to demonstrate its potential in such apparently distinct fields like extractive metallurgy, materials engineering, and medicine.

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Thermodynamic Modeling of the Solid State Carbothermic Reduction of Chromite Ore

Marzoughi

Pickles

2018

The Minerals, Metals &Amp; Materials Series

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Effect of mechanical activation on carbothermal reduction of chromite with graphite

Cited by 13 publications

References 15 publications

Thermal Analysis Study on the Carbothermic Reduction of Chromite Ore with the Addition of Mill Scale

Thermal Analysis Study on the Carbothermic Reduction of Chromite Ore with the Addition of Mill Scale

Mechanochemistry in Technology: From Minerals to Nanomaterials and Drugs

Thermodynamic Modeling of the Solid State Carbothermic Reduction of Chromite Ore

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