State of the art technology of direct and smelting-reduction of iron ores

Steffen, Rolf; Lüngen, Hans Bodo

doi:10.1051/metal:2004131

Cited by 11 publications

(3 citation statements)

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“…The COMET process is another variant on the RHF process developed by the Centre for Research in Metallurgy (CRM), utilizing a non-agglomerated iron ore mixture in alternating layers with a reducing agent and a desulfurizing agent such as limestone (Steffen & Lüngen 2004).…”

Section: Comet Processmentioning

confidence: 99%

Pyrometallurgical removal of zinc from basic oxygen steelmaking dust – A review of best available technology

Stewart

Barron

2020

Resources, Conservation and Recycling

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Approximately 20 kg of dust and sludges are produced per ton of liquid steel produced via the blast furnaces (BF)/basic oxygen furnace (BOF) production route. Many of these dusts are recycled through the sinter plant or blast furnace route without issue, but high zinc content dusts are routinely landfilled. Hydrometallurgical techniques, such as alkaline leaching, that are often utilized to remove zinc from electric arc furnace dusts are inappropriate for recovery of material from BOS dust due to the lower zinc concentration present and extra post-processing steps to utilize the separated iron product. Pyrometallurgical treatment through a rotary hearth furnace (RHF), in processes such as FASTMET ® , can currently be considered as the most commercially attractive option for the processing and recovery of iron and zinc units when employed as part of an integrated steelworks. The crude zinc oxide produced is suitable for sale to zinc smelters, and the direct reduced iron produced provides process benefits through use, such as reduced blast furnace coking rates and increased productivity. The advantages and disadvantages of variations and alternatives are reviewed with regard to future developments.

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Section: Comet Processmentioning

confidence: 99%

Pyrometallurgical removal of zinc from basic oxygen steelmaking dust – A review of best available technology

Stewart

Barron

2020

Resources, Conservation and Recycling

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“…Em uma das vertentes dos processos HyL, no processo HyL-ZR (Zero Reformer) não há um reformador externo e a reforma é realizada no reator de redução utilizando a própria superfície do ferro reduzido como catalisador. Neste caso, as temperaturas são da ordem de 1050ºC e pressão de 6-8 bar [4].…”

Section: Introductionunclassified

Carburação De Ferro Nas Condições Dos Processos De Redução Direta

Barbosa¹,

Ribeiro²,

Mourão³

2018

ABM Proceedings

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Resumo Como um dos grandes produtores de minério de ferro do mundo e, consequentemente, de pelotas destinadas para processos de redução direta (RD) é de grande importância que se conheça, no cenário nacional de indústrias e centros de pesquisas,osdetalhes dos processos RD. O presente trabalho é uma revisão bibliográfica dos fenômenos associados à carburação do ferro em condições similares às dos processos de redução direta.. Palavras-chave:Carburação de ferro; DRI; redução direta; reforma de metano. IRON CARBURATION UNDER DIRECT REDUCTION PROCESSES CONDICTIONS Abstract As one of the world's biggest iron ore producers and, consequently, pellets destined for direct reduction (DR) processes, it is of great importance that DR processes be known in detail by Brazilian industries and researcher centers, including pricing and development of new pellets. The present work is a review of the phenomena associated to iron carburation under conditions similar to the direct reduction processes.

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“…The most serious problem of Fluidized bed is sticking in the reduction process of iron ore [4,5] . The fine ore will loss the fluidized state suddenly after it has a reduction degree, and the regeneration is difficult, which make the reduction process interruption.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Sticking Behavior of Fluidized Bed in Reduction Process

Wang

Liu²,

Fang

2012

AMR

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It is a good way that the fluidized bed is used as a substitute for reduction shaft in Corex process. Which can reduce energy consumption, environmental pollution and construction costs further, and also improve the competitiveness of Corex and blast furnace. At present, the sticking problem is present in iron ore reduction process and interrupts the reduction process, it has become a major obstacle on the development of fluidized bed. In this paper, a visualization hot model of fluidized bed is introduced. The influence factors on sticking behavior were analyzed from reduction temperature, gas velocity, atmosphere, degree of metallization or reduction and property of iron ore, the research provided a strong theoretical basis for controlling the sticking.

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State of the art technology of direct and smelting-reduction of iron ores

Cited by 11 publications

References 0 publications

Pyrometallurgical removal of zinc from basic oxygen steelmaking dust – A review of best available technology

Pyrometallurgical removal of zinc from basic oxygen steelmaking dust – A review of best available technology

Carburação De Ferro Nas Condições Dos Processos De Redução Direta

Experimental Study on Sticking Behavior of Fluidized Bed in Reduction Process

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