Thermodynamics Analysis for the Zinc Ferrite Reduction by Hydrogen

Polsilapa, Sureerat; Sadedin, D.R.; Wangyao, Panyawat

doi:10.1515/htmp.2011.119

Cited by 14 publications

(17 citation statements)

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“…These results are similar to the findings in earlier works [10,13,16]. Siqueira et al found metallic iron at the initial stages of reduction of synthesized zinc ferrite samples by H 2 at 973 K, although eventually ZnO was also reduced at this temperature [10].…”

Section: Reduction Of Znfe 2 O 4 By Hydrogen Gassupporting

confidence: 91%

“…High temperatures and long reaction times required for carbothermal reduction of zinc ferrite have raised the interests in investigation of gaseous reduction techniques for processing EAFD. Several researchers have suggested application of gaseous reducing agents for treatment of EAF dusts [10][11][12][13]16]. In this work, the isothermal reduction of zinc ferrite by hydrogen gas was examined.…”

Section: Gaseous Reduction Of Zinc Ferrite By Hmentioning

confidence: 99%

“…In an investigation by Polsilapa et al, iron and zinc oxide were present in the samples reduced by pure hydrogen at 773 and 873 K for 50 min. At temperatures above 973 K, considerable reduction of zinc took place [13].…”

Section: Reduction Of Znfe 2 O 4 By Hydrogen Gasmentioning

confidence: 99%

“…The Waelz kiln process is widely used for recycling of EAF dust. However, new reduction processes have been examined and proved to be effective in treatment of EAFD and obtaining products with lower impurities than the Waelz kiln process [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Selective Reduction of Iron Oxide in Zinc Ferrite by Carbon and Hydrogen

Kazemi

Sichen

2015

J. Sustain. Metall.

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The feasibility of selective reduction of iron oxide in zinc ferrite, which is one of the main components of electric arc furnace dust (EAFD), was examined. Experiments were carried out by using graphite powder or pure hydrogen gas as reducing agents. The carbothermal reduction experiments performed at temperatures between 973 and 1073 K in inert atmosphere indicated that the method was difficult to apply in practice due to slow rates of reaction and vaporization of zinc. Selective reduction of iron oxide in zinc ferrite was achieved by using pure hydrogen gas as the reductant. The iron oxide was reduced to metallic iron, while ZnO remained unreacted in the solid phase. As reaction times were increased at 873 K, ZnO was also reduced and zinc evaporated. The main advantages of H 2 reduction are high reaction rates, low energy requirements, and no CO 2 emissions. The addition of this process prior to the hydrometallurgical techniques for treatment of EAFD could overcome the difficulties for dissolution of zinc ferrite.

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Section: Reduction Of Znfe 2 O 4 By Hydrogen Gassupporting

confidence: 91%

Section: Gaseous Reduction Of Zinc Ferrite By Hmentioning

confidence: 99%

Section: Reduction Of Znfe 2 O 4 By Hydrogen Gasmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of Selective Reduction of Iron Oxide in Zinc Ferrite by Carbon and Hydrogen

Kazemi

Sichen

2015

J. Sustain. Metall.

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“…Amount of iron, zinc and other elements contained in the dust depends on the quality of steel scrap used in smelting in electric arc furnaces. Amount of dust emitted from EAF furnaces ranges from 1 to 17 kg/Mg finished steel [13,14]. In Table 5 the percentage and the chemical composition of EAF dust from several foreign steel are given.…”

Section: Dustsmentioning

confidence: 99%

Charakteristics of Fine-Grid Iron-Bearing Materials (Dusts, Sludges, Mill-Scale Sludges)

Więcek

Mróz²

2014

Acta Metall. Slovaca Conf.

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As a result of manufacturing processes, steelworks plants produce large amounts of waste materials. Currently in modern steelworks the most of waste is utilized in the same steelworks and passed to external customers or it is reused as a feed for other technological processes. Finegrained metallurgical waste materials are used to production of granules because of the high contents of iron and other valuable elements. Granulation of iron-bearing waste materials increases permeability of blend and performance of the sinter strand. Dosing of material in the form of granules to an average sinter mix may be accomplished in a more controlled manner than is the case for bulk material. Due to recycling carried out by adding granulated wastes to blast furnace charge or to sintering process the cost of production of steel is reduced. This procedure allows metallurgical sector on the delivery of measurable economic, technological and environmental benefits. In this work the chemical composition, grain size and the possibility of using fine-grained iron-bearing wastes are presented.

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Microwave-Based Approach to Recovering Zinc from Electric Arc Furnace Dust Using Silicon Powder as a Non-carbonaceous Reductant

Mizuno

Kosai

Yamasue

2021

JOM

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Thermodynamics Analysis for the Zinc Ferrite Reduction by Hydrogen

Cited by 14 publications

References 0 publications

Investigation of Selective Reduction of Iron Oxide in Zinc Ferrite by Carbon and Hydrogen

Investigation of Selective Reduction of Iron Oxide in Zinc Ferrite by Carbon and Hydrogen

Charakteristics of Fine-Grid Iron-Bearing Materials (Dusts, Sludges, Mill-Scale Sludges)

Microwave-Based Approach to Recovering Zinc from Electric Arc Furnace Dust Using Silicon Powder as a Non-carbonaceous Reductant

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