Analysis of the combined injection of pulverized coal and charcoal into large blast furnaces

Castro, José Adilson de; Araújo, Giselle de Mattos; Mota, Izabel de Oliveira da; Sasaki, Yasushi; Yagi, Jun‐ichiro

doi:10.1016/j.jmrt.2013.06.003

Cited by 46 publications

(27 citation statements)

References 19 publications

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“…O aproveitamento dos finos gerados durante a produção de carvão vegetal é uma prática que contribui positivamente para a sustentabilidade econômica desta atividade. Antes considerado como resíduo, atualmente os finos são utilizados principalmente para a injeção auxiliar nas ventaneiras dos altos-fornos com o objetivo de reduzir o consumo de carvão granulado (Castro et al, 2013). Além disso, o excedente deste subproduto muitas vezes é vendido para empresas produtoras de cimento, cerâmicas e outros produtos para ser utilizado como fonte de calor.…”

Section: Análise Estatística Dos Dadosunclassified

Caracterização do carvão vegetal produzido em fornos retangulares industriais

Figueiró

Carneiro

Santos

et al. 2019

Agraria

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RESUMO: O objetivo deste estudo foi caracterizar as propriedades do carvão vegetal produzido em fornos retangulares industriais, por meio da análise de componentes principais. Para isto, foram amostrados três estoques industriais de carvão vegetal, provenientes dos Forno I e II, com capacidade volumétrica de 500 e 180m 3 de madeira, respectivamente. Determinaramse as características do carvão vegetal, como granulometria média, teor de finos, densidade a granel e composição química imediata. Foram realizadas as análises descritiva e de componentes principais com o objetivo de avaliar as relações entre as propriedades do carvão vegetal. De forma geral, para ambos os fornos, observou-se que a granulometria média teve uma relação negativa com teor de finos, enquanto a densidade a granel, uma relação positiva. No entanto, a relação entre o carbono fixo e teor de cinzas para o Forno I foi direta, e para o II foi inversa. As propriedades do carvão vegetal dos fornos retangulares, de forma geral, apresentam média assimetria. O carvão vegetal possui alta variabilidade nas suas propriedades, no entanto, é possível, por meio de ajustes operacionais, melhorar a qualidade do carvão para o consumidor final.Palavras-chave: análise de componentes principais; carbono fixo; granulometria média Characterization of charcoal produced in industrial rectangular furnaces ABSTRACT:The objective of this study was to characterize the properties of charcoal produced in industrial rectangular furnaces, using principal components analysis. For this, three industrial stocks of charcoal were sampled from Furnace I and II, with volumetric capacity of 500 and 180m 3 of wood, respectively. The average particle size, fines content, bulk density and proximate composition were determined. Descriptive analysis and principal component analysis were carried out to evaluate the relationships between charcoal properties. In general, for both furnaces, it was found that the average particle size showed a negative relationship with fines content as the bulk density had a positive relationship with the content of fines. However, the relationship between the fixed carbon and ash content for Furnace I was direct, and for Furnace II was inverse. The charcoal properties of the rectangular furnaces, in general, present a medium asymmetry. The charcoal has a high variability in its properties, however, it is possible, by operating adjustments to improve the quality of coal to the consumer.

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Section: Análise Estatística Dos Dadosunclassified

Caracterização do carvão vegetal produzido em fornos retangulares industriais

Figueiró

Carneiro

Santos

et al. 2019

Agraria

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“…0.5 TWh a −1 to the two blast furnaces, saving ca. 52.5 kMTA of PCI coal with a heating value of 32.4 MJ kg −1 , worth ca. € 3 million per year.…”

Section: Processing Steel Mill Gases Into Syngas For Methanol Productionmentioning

confidence: 99%

Coupled Production of Steel and Chemicals

Bender

Roussière

Schelling

et al. 2018

Chemie Ingenieur Technik

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Within Carbon2Chem® the presented subproject focused on oxymethylene ethers (OME) as possible diesel fuel components. Six different scenarios for CO2 emission reduction in steel mills were calculated, in four of which methanol is generated as an OME intermediate from steel mill gases. Potential synergies in raw material and energy streams of the coupled processes were identified. Shared process streams and equipment could lead to savings in capital and operational expenditure. CO2 reduction volumes and avoidance costs were calculated for the six scenarios. If coupled with methanol production, natural gas‐based direct reduced iron processes offer the chance for quantitative CO2 emission reduction at the lowest CO2 avoidance costs. Energy required for this process could be co‐fed, e.g., as renewable electricity.

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“…Subsequently, this approach was extended with other phases such as liquid iron and slag or dust [2] and more physics such as heat and mass transfer or thermochemical reactions. [3][4][5][6] Although numerically not too expensive, such Eulerian methods generally suffer from the lack of particle-based representation. As the contact mechanics of densely packed, solid grains is very complicated, a description in terms of field quantities such as the local amount of particle mass and momentum is connected to a significant uncertainty in the resulting meso-and macroscopic flow patterns, which also affects transport of heat and hence the gas dynamics.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Toward Data‐Assisted Particle‐Fluid Simulations of Heat Transfer in Blast Furnaces

Lichtenegger

Pirker

2020

steel research int.

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Detailed particle‐fluid simulations of moving bed reactors such as blast furnaces (BFs) are computationally very expensive. The wide range of temporal scales from short‐lived micromechanics to slow, macroscopic transport makes it almost impossible to study e.g., heat transfer over process‐relevant time scales. However, a recently introduced approach that uses high‐fidelity data obtained with the discrete element method (DEM) enables extremely fast data‐assisted simulations. Using this methodology, calculations are conducted, which are efficient enough to study granular motion through a BF slot model subject to heat transfer between the hot blast and the solid phase over many hours. These long durations make it possible to determine the thermal steady state including shape and location of the cohesive zone (CZ). While other approaches either have to predefine its properties or are bound to very small domain sizes, this novel strategy is applied to a large‐scale BF slot model with about 28 m height and 15 m width with hardly any prior knowledge. It constitutes an important step toward virtual experiments on BFs under realistic conditions and will allow researchers to gain new insights, perform variations of operating parameters, and ultimately build an online monitoring system.

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Analysis of the combined injection of pulverized coal and charcoal into large blast furnaces

Cited by 46 publications

References 19 publications

Caracterização do carvão vegetal produzido em fornos retangulares industriais

Caracterização do carvão vegetal produzido em fornos retangulares industriais

Coupled Production of Steel and Chemicals

Toward Data‐Assisted Particle‐Fluid Simulations of Heat Transfer in Blast Furnaces

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