Properties of steelmaking dust and the mechanism of its formation

Doronin, I. E.; Svyazhin, A. G.

doi:10.1007/s11015-012-9517-8

Cited by 14 publications

(6 citation statements)

References 3 publications

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“…cadmium, and lead [25,26]. In addition to these metals, EAFD contains a considerable amount of Cl, which triggers the formation of hazardous chlorinated compounds (most notably polychlorinated dibenzo-p-dioxins, and polychlorinated dibenzofurans, PCDD/Fs) [27][28][29][30][31][32]. These metals, in turn, can be used as secondary raw materials in the production of iron, lead and zinc [15,[33][34][35][36].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Catalytic de-chlorination of products from PVC degradation by magnetite (Fe3O4)

Ahmed

Altarawneh

Al-Harahsheh

et al. 2019

Applied Surface Science

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This contribution provides a systematic theoretical thermo-kinetic study of the initial reactions between Fe 3 O 4 (111) surface, as a representative model for metal oxides in electric arc furnace dust (EAFD) with HCl and selected chlorinated hydrocarbons, as major products from thermal degradation of PVC. Formation of the experimentally observed iron chloride occurs by subsequent dissociative addition of HCl molecules followed by H migration into a surface hydroxyl group. We provided Arrhenius parameters for reactions dictating the conversion of iron oxide into its chloride. In the course of the interaction of chlorinated alkanes and alkenes with the Fe 3 O 4 surface, the opening channel in the dissociative addition route requires lower activation barriers in reference to the direct HCl elimination pathways.However, sizable activation barriers are encountered in the subsequent β C-H bond elimination step. Estimated electronic charges confirm the nature of surface Fe-Cl bonds as Lewis acid−base pair. The obtained accessible reaction barriers for reactions of chlorinated alkanes and alkenes with the title iron oxide demonstrate that the latter serve as active catalysts in producing clean olefins streams from chlorinated alkanes. Results from this study should be instrumental to understand, on a precise atomic scale, mechanisms operating in fixation of halogens on transitional metal oxides; a viable thermal recycling approach for polymeric materials laden with halogenated constituents.

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Section: Accepted Manuscriptmentioning

confidence: 99%

Catalytic de-chlorination of products from PVC degradation by magnetite (Fe3O4)

Ahmed

Altarawneh

Al-Harahsheh

et al. 2019

Applied Surface Science

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“…Despite the growing cost of the storage of this raw material at landfills and slag fields, the multi-million-ton dumps from the ferrous metallurgy production activity (oily scale, gas-cleaning dust, sludge, slag) are continuously increasing [16][17][18]. Such hard-to-enrich and low-grade materials include electric arc furnace dust, which can be not only an ironcontaining raw material for iron and steel production but allows for extracting zinc into a commercial product since the dust contains zinc compounds in sufficient quantities [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Pyrometallurgical Technology for Extracting Iron and Zinc from Electric Arc Furnace Dust

Nemchinova

Patrushov²,

Tyutrin

2023

Applied Sciences

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This study is aimed at developing a technology for processing electric arc furnace dust (EAFD) into granulated cast iron and a zinc-containing product. The study object was the dust from the EAF of PJSC Magnitogorsk Iron and Steel Works (Magnitogorsk, Chelyabinsk region). It has been established that the dust contains valuable components in the form of ZnFe2O4 and ZnO. The processing of EAFD involves the reduction of Fe and Zn in a charge from their oxygen-containing forms with C and CO. The content of the charge components was calculated in % as follows: EAFD—17.44; scale—51.33; hard coal—20.61; quartz sand—4.71; lime—5.91. The experiments in the high-temperature LHT 08/17 furnace (Germany) allowed for defining the optimal temperature regime for reduction melting. As a result of laboratory tests, granulated pig iron samples were obtained, containing in wt%: Fe—95.27; C—4.4; S—0.07, and others. Captured zinc-containing product after calcination (to remove halogens) contained 90.21 wt% ZnO. The resulting granulated pig iron is recommended as one of the charge components in electrometallurgical steel production. The zinc-containing product is recommended as a raw material for Zn production and others.

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“…Por serem materiais com granulometria bastante fina, geralmente abaixo de 1 milímetro, tem elevado potencial poluidor, seja por arraste pela ação dos ventos, seja por carreamento para corpos hídricos pela ação das chuvas. Por outro lado, os pós e as lamas de aciaria [2] têm elevados teores de ferro, o que lhes garantem um efetivo potencial de substituição dos materiais primários nos processos metalúrgicos, desde que adequadamente processados. Por razões tecnológicas e/ou econômicas, os pós de aciaria ainda não são totalmente aproveitados nos processos industriais, seja no Brasil ou no exterior, embora existam diversas tecnologias que preveem o aproveitamento deste coproduto.…”

Section: Introductionunclassified

Aglomeração a Frio Do Pó De Aciaria Ld Proveniente Do Sistema De Despoeiramento Primário À Seco

Oliveira¹,

Quintanilla²,

D'Abreu³

2019

ABM Proceedings

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Resumo Os pós ou lamas de aciaria gerados nos sistemas de despoeiramento dos gases de exaustão do conversor LD têm papel relevante entre os coprodutos siderúrgicos devido àssuas significativasgerações, dificuldadesno manuseio e acondicionamento e expressivo custo paraprocessamento e/ou disposição em aterros controlados. Em contrapartida, o elevado teor de ferro que possuem torna viável a sua reciclagem. Neste trabalho foram caracterizados os particulados gerados no processo à seco do tratamento de gases de uma aciaria LD, com os objetivos de aglomerá-los via briquetagem e de reciclá-los como carga ferrosa nos processos de produção de ferro primário e/ou para o controle de temperatura do aço líquido do conversor LD. Um estudo prévio sobre suas estabilizações se fez necessário, considerando a possibilidade de ruptura dos briquetes produzidos por conta das expansões volumétricas durante a etapa de cura. Na etapa de briquetagem, que utilizou como aglomerantes o melaço e o cimento ARI, ficou demonstrada a importância da distribuição granulométrica dos coprodutos e da relação água/aglomerante. Comparativamente, o melaço foi quemgerou briquetes com melhores resultados de resistência à compressão, considerando os primeiros 18 dias de cura, enquanto que aos 28 dias os briquetes de ambos aglomerantesapresentaram desempenhos praticamente equivalentes.

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Properties of steelmaking dust and the mechanism of its formation

Cited by 14 publications

References 3 publications

Catalytic de-chlorination of products from PVC degradation by magnetite (Fe3O4)

Catalytic de-chlorination of products from PVC degradation by magnetite (Fe3O4)

Pyrometallurgical Technology for Extracting Iron and Zinc from Electric Arc Furnace Dust

Aglomeração a Frio Do Pó De Aciaria Ld Proveniente Do Sistema De Despoeiramento Primário À Seco

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