Recycling of Solid Wastes from Integrated Steelmaking Plant: A Sustainable Alternative

Takano, Cyro; Nascimento, Rafael; Silva, Guilherme Frederico Bernardo Lenz e; Santos, Dener Martins dos; Mourão, Marcelo Breda; Capocchi, José Deodoro Trani

doi:10.2320/matertrans.42.2506

Cited by 25 publications

(14 citation statements)

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“…Estima-se que a geração de carepa em usinas siderúrgicas seja de 1 a 2% da produção de aço [1]. No Brasil são geradas cerca de 300 mil toneladas desse resíduo por ano, enquanto em nível mundial esse valor chega a 7 milhões de toneladas [2]. Fatores como o custo da destinação adequada dos resíduos siderúrgicos, além da implementação de práticas de produção mais limpa, tem incentivado a pesquisa de novas alternativas de recuperação ou aproveitamento de resíduos gerados na produção do aço.…”

Section: Introductionunclassified

Briquetes Autorredutores a Partir De Carepas De Processamento Siderúrgico Para Utilização Em Fornos Elétricos a Arco

Buzin¹,

Flores²,

Heck³

et al. 2017

Anais Dos Seminários De Redução, Minério De Ferro E Aglomeração

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ResumoA produção siderúrgica em usinas semi-integradas gera vários tipos de resíduos dentre os quais as carepas. No presente trabalho estuda-se o comportamento físico-químico em altas temperaturas de briquetes autorredutores elaborados com carepa e finos de carvão vegetal produzidos no Rio Grande do Sul, objetivando sua introdução no processo produtivo de aciaria elétrica. Ensaios realizados em laboratório com briquetes industriais confeccionados com estes resíduos demonstraram a potencialidade de utilização destes briquetes autorredutores em processos siderúrgicos via forno elétrico a arco (FEA). Palavras-chave: Carepa; Finos carvão vegetal; Briquetes autorredutores. SELF-REDUCING BRIQUETTES FROM STEELMAKING MILL SCALE FOR USE IN ELECTRIC ARC FURNACE AbstractThe steelmaking industry in semi-integrated plants generates several wastes, among which mill scale. In this paper it was studied self-reducing briquettes made with mill scale and charcoal fines produced in Rio Grande do Sul State and its physicochemical behavior at high temperatures. The objective is its reintroduction in electric steelmaking process. Laboratory tests with industrial briquettes made with these residues had demonstrated the potential use of these briquettes in steelmaking processes through electric arc furnace (EAF).

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Section: Introductionunclassified

Briquetes Autorredutores a Partir De Carepas De Processamento Siderúrgico Para Utilização Em Fornos Elétricos a Arco

Buzin¹,

Flores²,

Heck³

et al. 2017

Anais Dos Seminários De Redução, Minério De Ferro E Aglomeração

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“…They found that use of this fluxed sinter promoted better flux dissolution, earlier slag formation, greater removal of both sulfur and phosphorous and increase in metallic yield without any sloping. Some investigators 9,13) used iron oxides in form of cement bonded pellets and observed lowering scrap consumption earlier slag formation and faster refining.…”

Section: Introductionmentioning

confidence: 99%

“…They have reported replacement of scrap, 6,7) increase in metallic yield 3,[7][8][9] and reduced oxygen consumption. 3,7) However, Dukelow et al 6) have found high to medium slopping with WOB.…”

Section: Introductionmentioning

confidence: 99%

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Performance Assessment of CO2 Treated Fluxed Iron Oxide Pellets in Basic Oxygen Steel Making Process

et al. 2010

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Lump lime and iron ore are generally used in BOF as flux and cooling material respectively. Owing to high melting point, poor dissolution property, fines generation and hygroscopic nature of lump lime, delay in process and operational complexities are generally encountered. On the other hand, iron ore charging creates slag foaming. In order to alleviate the above problems and to utilize waste materials, fluxed iron oxide pellets containing waste iron oxides (ϳ70 %) and lime fines (ϳ30 %) were prepared and subsequently strengthened with CO 2 gas treatment. This carbonated fluxed pellets exhibited very good CCS (30 kg/pellet) and DSN (150), suitable for cold handling. The performance of this pellet has been assessed in a laboratory scale bottom blowing converter for its specific use in BOF. The refining characteristic of a liquid bath, prepared with pig iron chips was studied using a laboratory scale bottom blowing converter with three flux conditions namely fluxed pellet plus additional lime, iron ore lump plus lump lime and only lump lime. It has been observed that use of these pellets improves decarburization and dephosphorization, increases the metallic yield, decreases oxygen consumption and reduces foaming. Overall, the developed pellet shows very good application potential in basic oxygen steel making.

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“…Several investigators [2][3][4][5][6][7][8][9][10][11][12][13] have tried to utilize iron oxide in basic oxygen steel making in the form of pellets, briquettes or sinter, with a view to increase total iron oxide content in slag and waste utilization. Guangqing Zuo 14) has reported that softening point of BOF slag becomes lower with high FeO and Fe 2 O 3 content.…”

Section: Introductionmentioning

confidence: 99%

High Temperature Characterization of CO2 Treated Fluxed Pellets Developed for Basic Oxygen Steel Making

et al. 2009

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Recycling of Solid Wastes from Integrated Steelmaking Plant: A Sustainable Alternative

Cited by 25 publications

References 1 publication

Briquetes Autorredutores a Partir De Carepas De Processamento Siderúrgico Para Utilização Em Fornos Elétricos a Arco

Briquetes Autorredutores a Partir De Carepas De Processamento Siderúrgico Para Utilização Em Fornos Elétricos a Arco

Performance Assessment of CO2 Treated Fluxed Iron Oxide Pellets in Basic Oxygen Steel Making Process

High Temperature Characterization of CO2 Treated Fluxed Pellets Developed for Basic Oxygen Steel Making

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