Chemical and Mineralogical Characterization of Ghanaian Foundry Slags

Andrews, A. I.; Gikunoo, Emmanuel; Ofosu-Mensah, L.; Tofah, H.; Bansah, S.

doi:10.4236/jmmce.2012.112015

Cited by 11 publications

(17 citation statements)

References 16 publications

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“…Os elementos químicos presentes no resíduo de escória de FeNi podem oferecer alguns danos ao meio ambiente: escória contendo lixiviado sulfuroso resulta em odor de enxofre e descoloração da água em condições precárias de drenagem (KARAMANOVA, 2011); escória contendo altos níveis de níquel pode P a g e | 453 Revista Ibero-Americana de Ciências Ambientais v.12 -n.5  Mai 2021 causar corrosão do ferro e do aço na presença de umidade (NISTOR, 2007). Por esse motivo, a aplicação de escórias ferrosas depende da avaliação de suas características químicas e mineralógicas (ANDREWS et al, 2012;SAMNUR et al, 2016;SAGADIN et al, 2016). No entanto, escórias contendo quantidades desprezíveis de enxofre e níquel não são ecologicamente prejudiciais e, portanto, podem ser utilizadas (FINDANCEVSKA, 2009).…”

Section: Introductionunclassified

“…Dentro dessa perspectiva e do potencial de uso, a escória de ferroníquel foi objeto de estudo de diversos autores, nacionais e internacionais, tais como (COSTA, 2019;COSME, 2019;SAMUR et al, 2016;SAGADIN et al, 2016;ANDREWS et al, 2012;DEMOTICA et al, 2012;SANTOS, 2013, CRUZ et al, 2013WANG et al, 2011;FRANCKLIN JUNIOR et al, 2010;RODRÍGUEZ et al, 2007;LIMA et al, 2009);RICHTER, 2009;NÓBREGA et al, 2005;TASSAVAINEN, 2005;WANG et al, 2004). Como também estudos com registros de utilização de escória de ferro níquel apenas no concreto, conforme Kokubu et al (1994) Segundo Santos (2013) os novos materiais empregados apresentam características físicas e mecânicas semelhantes às dos agregados convencionais e reflete a importância da integração entre a universidade e a indústria, buscando a viabilidade de novas tecnologias.…”

Section: Introductionunclassified

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Pavimento asfáltico contendo escória de ferro-níquel: uma solução viável

Coelho

Santana

Guimarães

et al. 2021

RICA

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Analisando as propriedades da escória de FeNi (ferroníquel) a partir do processo de redução e sua viabilidade de utilização na engenharia de pavimentos, como agregado alternativo (miúdo), estudou-se o comportamento de uma mistura asfáltica, utilizando ligante convencional CAP 50/70, agregados naturais e escória de FeNi. Além da análise laboratorial, este estudo contemplou a avaliação e monitoramento de um trecho experimental, localizado em Niquelândia-GO. As amostras foram dosadas pela metodologia Marshall e avaliadas quanto às propriedades de resistência e deformabilidade. A distribuição de partículas de escória de FeNi foram classificadas como areia média e grossa e, de composição química inerte (ABNT - NBR 10004/2004). A mistura contendo FeNi apresentou altos valores de resistência à tração, módulo resiliente e estabilidade, podendo considerar o material uma alternativa promissora no uso em pavimentação de baixo custo, visto que, levou a resultados condizentes com o que as especificações do DNIT recomendam para utilização em pavimentos.

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Section: Introductionunclassified

Pavimento asfáltico contendo escória de ferro-níquel: uma solução viável

Coelho

Santana

Guimarães

et al. 2021

RICA

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“…The candidate material selected for this study was EAF dust slag. Its major components are basic oxides including CaO (35.4%), FeO/Fe 2 O 3 (19.2%), MgO (7.8%) and Al 2 O 3 (6.9%) rendering its leachate alkaline [36,37]. This property can be exploited to utilise the slag for neutralisation and the removal of metals from acid effluent of industries by integrating it with lime.…”

Section: Introductionmentioning

confidence: 99%

Neutralisation of acid effluent from steel manufacturing industry and removal of metals using an integrated electric arc furnace dust slag/lime process

et al. 2019

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In this study, an integrated electric arc furnace (EAF) dust slag/lime (Ca(OH) 2) treatment method was used to treat acid effluent generated by the same stainless steel producer. EAF slag alone was able to raise the pH to 8.7; thereafter, lime was added to increase the pH to the target pH of 12. The test proved that EAF dust slag, in conjunction with lime, can be used for neutralisation of acid effluent from a steel industry and for the removal of metals Co, Cr, Fe, Ni and Zn. The target metals were removed from the effluent, achieving greater than 99.6% removal. The process was simple and involves only mechanical mixing of the two constituents. Hence, it can be regarded as economically advantageous and environmental friendly since it only utilises a material considered as waste and a small quantity of lime. In addition to being a costeffective replacement for expensive chemicals used in wastewater treatments, this method can alleviate the problem associated with the disposal of slag, a solid waste generated by a steel manufacturing industry.

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“…ey found that the compressive strength of mortar and concrete containing IFS up to 30 percent as fine aggregate is comparable with the strength of concrete with 100% sand. Andrews et al [18] discussed the application of IFS and cupola furnace slag from different industries in Ghana as aggregate in concrete and as road bed material.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Durability Properties of Induction‐Furnace‐Slag‐Incorporated Recycled Aggregate Concrete

Ahmad

Rahman

2018

Advances in Civil Engineering

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Most of the steel mills in Bangladesh use induction furnace which produces large quantities of slags that have very little use except land filling. Therefore, feasibility of using this slag is examined in concrete with recycled aggregate, which is another waste product that is generated due to removal of old structures. Concrete with three target strengths, 17.23, 20.68, and 24.13 MPa, was prepared using recycled concrete acquired from a recently demolished building in Dhaka, Bangladesh. Recycled coarse aggregate was replaced with induction furnace slag by 0%, 25%, 50%, 75%, and 100% for each target strength. Samples prepared from these concretes were tested for workability, compressive strength, splitting tensile strength, modulus of elasticity, and durability properties e.g., porosity, absorption, and rapid chloride penetration. Review of test results suggests that workability of concrete was not adversely affected by incorporation of induction furnace slag. For up to 50% of induction furnace slag replacement, both compressive strength and splitting tensile strength increased in recycled aggregate concrete. Further, for all ratios of induction furnace slag replacement, modulus of elasticity increased compared to 100% recycled aggregate concrete. Porosity and absorption also decreased in concrete where up to 50% of recycled aggregate was replaced by induction furnace slag. Considering these, it is concluded that 50% of recycled aggregate can be replaced by induction furnace slag that will result in superior mechanical and durability properties in recycled aggregate concrete.

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Chemical and Mineralogical Characterization of Ghanaian Foundry Slags

Abstract: ABSTRACT

Cited by 11 publications

References 16 publications

Pavimento asfáltico contendo escória de ferro-níquel: uma solução viável

Pavimento asfáltico contendo escória de ferro-níquel: uma solução viável

Neutralisation of acid effluent from steel manufacturing industry and removal of metals using an integrated electric arc furnace dust slag/lime process

Mechanical and Durability Properties of Induction‐Furnace‐Slag‐Incorporated Recycled Aggregate Concrete

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