Modeling Sintering Process of Iron Ore

Castro, José Adilson de

doi:10.5772/33613

Cited by 8 publications

(9 citation statements)

References 34 publications

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“…Most of the sulphur contained in the fuel will burn out as sulphur dioxide [16]: S + O 2 = SO 2 Δ H°2 98 = -296,8 KJ/mol -1 S (1) While this reaction is exothermic and contributes to an increase in temperature, the sulphur in the fuel is undesirable because it represents an environmental risk. The sulphur content in most types of biomass is well below that of coke, therefore the amount of the SO x emissions using these fuels will be lower [16]. Agglomeration layer is due to high temperatures a suitable environment for the formation of nitrogen oxides.…”

Section: Introductionmentioning

confidence: 99%

“…They are formed mainly by oxidation of the nitrogen present in the fuel. The resulting product is a nitrogen monoxide [16]: ½ N 2 + ½ O 2 = NO Δ H°2 98 = 90,25 KJ/mol -1 NO (2) Nitrogen monoxide (NO) from combustion of the fuel may amount to 80 % of total oxides of nitrogen formed during agglomeration [8]. Because the biomass is usually poorer in nitrogen than coke, NO formation decreases with increasing share of biofuels.…”

Section: Introductionmentioning

confidence: 99%

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Impact of biofuel in agglomeration process on production of pollutants

2017

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Production of agglomerate in the metallurgical company belongs among the largest sources of emissions damaging the environment. Effects of coke breeze substitution by charcoal, pine, and oak sawdust there were sintering performed in a laboratory agglomeration pan with substitution ratios of 14 % and 20 % by the emissions of CO 2 , CO, NO x and NO. Variations in the gas emissions might have been affected by physical and chemical properties of the input materials and the technological parameters of agglomeration. It is important and necessary to seek other methods and materials with which it would be possible to optimize the production of emissions and protect the environment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of biofuel in agglomeration process on production of pollutants

2017

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“…Fumes are produced mainly in the processes of sintering and cooling of agglomerate [1], [2], [3]. As the quantity and quality of energy needs are constantly changing, the actual trend is focused primarily on finding renewable energy sources [4]. Combustion of coke as a fuel in agglomeration charge contributes significantly to the production of greenhouse gases, which are CO, CO 2 , SO x and NO x .…”

Section: Introductionmentioning

confidence: 99%

Effect of Biomass Addition in the Production of Iron Ore Agglomerate on the Environment

Leško¹,

Butkovská²,

Hudák³

2014

Acta Metall. Slovaca Conf.

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This article analyses the formation of emissions and their impact on the quality of the environment in the production of iron ore agglomerates with the addition of biomass. Agglomeration operations long time rang among the largest air polluters. The contemporary trend is manifested mainly by the reduction of pollutants emitted into the atmosphere; therefore, it is relevant to deal with this issue. The amount and chemical composition of harmful substances released by the production of iron ore agglomerate is affected by a large number of factors, but mainly by chemical and granulometric charge composition, amount, type and granulometry of fuel, but also technological parameters of sintering, such as negative pressure, thickness of sintered layer, charge permeability or speed and amount of sucked air. Analysis of the effect of the addition of biomass on the production of emissions in agglomeration process was carried out by experiments with laboratory sintering pan. Based on the results of laboratory sinterings, with the substitution of coke breeze by charcoal in the amounts of 8 %, 14 %, 20 %, 44 %, 50 % and 86 %, it can be stated that there was no significant over-production, or reduction of emissions of CO2 and CO when compared to coke breeze as fuel. In the case of NO and NOx emissions, there was observed some more significant reduction in the sintering with 44 %, 50 % and 86 % replacement of coke breeze by charcoal. Overall, the issue of coke breeze substitution in the agglomeration process with various types of biofuels is justified, but it should be explored in more detail.

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“…O succionar deste ar em associação com o movimento da esteira, leva a camada superficial formada pela ignição do material -a frente de combustão -a ser mover verticalmente ao longo material até, que ao final do trajeto percorrido pela esteira todo o material esteja sinterizado (CASTRO, 2012). De toda a energia requerida para movimentação da frente de combustão, cerca de 85 % procedem do combustível (coque fino); já o restante vem da ignição (do queimador) (INFOMET, 2015).…”

Section: Sinterizações/pelotizaçõesunclassified

“…No entanto, para que suas operações sejam realizadas, o processo predispõe elevado consumo de energia, principalmente de origem não renovável, como coque e antracito (CASTRO, 2012). O consumo de combustível sólido nas Sinterizações varia de 45-60 kg/t sinter produzido.…”

Section: Sinterizações/pelotizaçõesunclassified

Proposição de melhorias do desempenho ambiental do processo de produção do aço líquido.

Camillo¹

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Modeling Sintering Process of Iron Ore

Cited by 8 publications

References 34 publications

Impact of biofuel in agglomeration process on production of pollutants

Impact of biofuel in agglomeration process on production of pollutants

Effect of Biomass Addition in the Production of Iron Ore Agglomerate on the Environment

Proposição de melhorias do desempenho ambiental do processo de produção do aço líquido.

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