Investigation of thermal properties of blast furnace slag to improve process energy efficiency

Yasipourtehrani, Sara; Strezov, Vladimir; Bliznyukov, Sergey; Evans, Tim

doi:10.1016/j.jclepro.2017.02.052

Cited by 33 publications

(11 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…-3 e à vibração da banda de hidrogênio ligada ao carbono) [31,33]; 980 cm -1 (estiramento simétrico de Si-OH) [35,37]; 870 cm -1 (estiramento simétrico de Si-O; estiramento simétrico de T-OH (T = Si, Al)) [30,33,37] e 750 cm -1 (alongamento assimétrico de Si-O-Si e alongamento Al-O e indica a presença compostos aluminossilicatos) [33,37]. Observou-se maior intensidade para banda correspondente a 2532 cm -1 para o geopolímero de escória de panela LF, em relação aos geopolímeros de escória de convertedor LD, devido à presença de maior fração de calcita em sua composição.…”

Section: Análise De Espectroscopia De Infravermelho Por Transformada unclassified

Caracterização estrutural de geopolímeros sustentáveis de escória de aciaria LD e escória de aciaria LF com KOH

2020

View full text Add to dashboard Cite

RESUMO A produção de compósitos à base de produtos derivados de resíduos industriais conduziu o presente estudo, agregando valor aos resíduos de indústrias metalúrgicas e siderúrgicas, o que é revertido em bem à sociedade. Os materiais geopoliméricos podem ser uma das soluções para a destinação dos resíduos industriais gerados por esses setores. O objetivo do estudo foi investigar a relação entre sólido/líquido para produção de corpos-de-prova obtidos pela reação de geopolimerização, utilizando escória de aciaria de convertedor e de panela, ou seja, processo de Linz Donawitz (LD) e de ladle furnace (LF), respectivamente. As amostras dos resíduos foram sintetizadas a partir de uma solução alcalina de hidróxido de potássio 8 M (KOH), nas proporções de 1.2; 1.4 e 1.6 g/v (sólido/líquido). As análises de composição química, estabilidade térmica, microestrutura, quantificação de fases cristalinas e porosidade foram realizadas por espectroscopia de fluorescência de raios X (FRX), espectroscopia de infravermelho por transformada de Fourier (FTIR), análise termogravimétrica (TGA), microscopia eletrônica de varredura com fonte de emissão de campo (MEV-FEG), difratometria de raios X (DRX) e determinação de densidade pelo princípio de Arquimedes. Os resultados indicaram que os geopolímeros obtidos a partir das escórias de aciaria geraram peças com estabilidade dimensional e altas possibilidades de aplicações como materiais de engenharia. Observou-se que a razão solido/líquido foi um ponto importante na síntese dos compósitos, uma vez que as amostras com razão 1.6 apresentaram um aspecto com maior coesão entre as partículas e maiores valores de densificação em relação às amostras com razões 1.2 e 1.4.

show abstract

Section: Análise De Espectroscopia De Infravermelho Por Transformada unclassified

Caracterização estrutural de geopolímeros sustentáveis de escória de aciaria LD e escória de aciaria LF com KOH

2020

View full text Add to dashboard Cite

show abstract

“…Calcium and silica oxides are the main chemical components in BFS along with other oxides, such as Al2O3 and MgO, and other metallic elements, such as Fe, Ti and Mn [1,5,6]. The chemical composition of BFS varies with the grade of iron ore and the fluxes used in smelting [4], while its structural phase is influenced by the slag cooling rate [7]. BFS currently is mainly considered in cement production and for civil engineering works [8,9].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Dye Removal Capability of Blast Furnace Slag in Wastewater Treatment

et al. 2021

Self Cite

View full text Add to dashboard Cite

Blast Furnace Slag (BFS) is a by-product of the iron ore processing industry with potential to be used in different industrial applications. In this research, BFS was used to examine its ability for dye removal from wastewater. The efficiency of two types of BFS samples for removal of cationic methylene blue (MB) and acidic methyl orange (MO) dyes was investigated and results found that the optimal conditions for treatment of wastewater were 80 g/L of adsorbent dose and 1 h of treatment time for both dyes. BFS was found to be more effective for removal of the acidic MO dye than the cationic MB dye. Under shorter residence times, the results showed reverse trends with BFS samples removing higher concentrations of MB than MO. The BFS chemistry had additional impacts on the efficiency of dye removal. Higher basicity of BFS had lower dye removal ability for adsorption of acidic dye when applied at smaller concentrations, while for cationic dye when applied at higher concentrations. The results showed that BFS has potential role for pre-treatment of industrial wastewater contaminated with dyes and may contribute to reduced use of more expensive adsorbents, such as activated carbons.

show abstract

“…Slag, which is produced in several stages of the process, represents the greatest amount of the useless co-product materials [1][2][3][4]. Slag from installations such as the blast furnace is successfully valorized [5,6], but other slag does not have this valorization rate. Linz-Donawitz (LD) steel-making is the most common process, whereby oxygen is blown through carbon-rich molten pig iron and changes it into low-carbon steel.…”

Section: Introductionmentioning

confidence: 99%

Classification of BOF Slag by Data Mining Techniques According to Chemical Composition

et al. 2020

View full text Add to dashboard Cite

In the process of converting pig iron into steel, some co-products are generated—among which, basic oxygen furnace (BOF) slag is highlighted due to the great amount generated (about 126 kg of BOF slag per ton of steel grade). Great efforts have been made throughout the years toward finding an application to minimize the environmental impact and to increase sustainability while generating added value. Finding BOF slag valorization is difficult due to its heterogeneity, strength, and overall swallowing, which prevents its use in civil engineering projects. This work is focused on trying to resolve the heterogeneity issue. If many different types of steel are manufactured, then different types of slag could also be generated, and for each type of BOF slag, there is an adequate valorization option. Not all of the slag can be valorized, but it can be a tool for reducing the amount that must go to landfill and to minimize the environmental impact. An analysis by means of data mining techniques allows a classification of BOF slag to be obtained, and each one of these types has a better adjustment to certain valorization alternatives. In the plant used as an example of the application of these studies, eight different slag clusters were obtained, which were then linked to their different potential applications with the aim of increasing the amount valorized.

show abstract

Investigation of thermal properties of blast furnace slag to improve process energy efficiency

Cited by 33 publications

References 47 publications

Caracterização estrutural de geopolímeros sustentáveis de escória de aciaria LD e escória de aciaria LF com KOH

Caracterização estrutural de geopolímeros sustentáveis de escória de aciaria LD e escória de aciaria LF com KOH

Investigation of Dye Removal Capability of Blast Furnace Slag in Wastewater Treatment

Classification of BOF Slag by Data Mining Techniques According to Chemical Composition

Contact Info

Product

Resources

About