The Tecnored ironmaking process Part 1 – Competitiveness and pilot development work

Júnior, José Henrique Noldin; Cox, Ian; D'Abreu, José Carlos

doi:10.1179/174328108x301705

Cited by 8 publications

(5 citation statements)

References 1 publication

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“…[3,4] The main smelting reduction processes are Corex, Finex, HIsmelt, HIsarna, and Tecnored. [5][6][7][8][9] In the smelting reduction process, the blowing gas strengthens the stirring effect and the driving force of mass transfer in the molten pool, accelerates the transfer of effective components, and increases the reaction rate between the slag and the metal. Simultaneously, the heat transfer is strengthened, and the temperature in the molten pool is evened, which is of great significance for improving production efficiency.…”

Section: Introductionmentioning

confidence: 99%

Mixing Behavior in a Side-Blown Vortex Smelting Reduction Reactor

Zhu

Zhao

Liu

et al. 2021

Metall Mater Trans B

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The side-blown vortex smelting reduction reactor proposed in this paper is a new type of metal extraction equipment. The study of fluid dynamics is significant for improving reactor performance. Physical simulation is used to analyze the effects of the angle and number of blown lances, nozzle diameter, gas flow rate, and measuring depths on the reactor's transfer and mixing characteristics. Dimensional analysis is used to correlate dimensionless numbers (Reynolds number Re, modified Froude number Fr¢, capillary number Ca, number of blown lances n, and horizontal angle of the blown lance a) with mixing time and multiphase flow behavior. The results show that when the nozzle diameter and the number of blown lances are constant, Fr¢, Ca and a are negatively correlated with the mixing time, and Re is positively correlated with the mixing time. When the angle of the blown lance is constant, Re and Ca are negatively correlated with mixing time, and Fr¢ is positively correlated with mixing time. With the increase of Re, Fr¢, Ca, the mixing behavior will gradually change from the bubbling regime to the transition regime and then to the steady jetting regime.

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Section: Introductionmentioning

confidence: 99%

Mixing Behavior in a Side-Blown Vortex Smelting Reduction Reactor

Zhu

Zhao

Liu

et al. 2021

Metall Mater Trans B

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“…After leaving the carbonization reactor the flue gas pass through the heat exchanger (8) to heat up the primary air which enters the combustion unit. The flue gas that leaves the drying unit and remaining from the combustion unit passes through a gas treatment system for dust collection (9) and is finally discharged into the chimney (10). The closed system was designed in order to avoid dust emissions.…”

Section: Process Conceptmentioning

confidence: 99%

“…Based on this experience, the first commercial plant is scheduled to be installed in Marabá-Brazil, with startup expected for 2025. Additional information about Tecnored Smelter Reduction can be found elsewhere [9].…”

Section: Biocarbon For Tecnored Smelter Technologymentioning

confidence: 99%

Tecnored Carbonization Process – A Novel Technology for Biocarbon Production

Soares¹,

Pohlmann²,

Flores³

et al. 2022

ABM Proceedings

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As one of the most energy and carbon-intensive industry worldwide, steel production sector aims to progressively reduce its carbon footprint and meet the goals of CO2 mitigation recently stablished in the climate change conferences. The novel Tecnored Carbonization Technology has emerging as a disruptive way to provide such less carbon-intensive sources for iron and steelmaking sector. This new carbonization process in mainly driven by the needs for using biomass of varied sources and grain sizes available in decentralized locations and producing biocarbon adapted to meet the technological requirements of steelmaking processes. The first plant of the Tecnored Carbonization process is under final installation in Pindamonhangaba (Sao Paulo state, Brazil) being able to produce up to 25.000 t/year of biocarbon. The process concept consists in separate the drying, carbonization and cooling steps and using the pyrolysis gases to heat the carbonization unit. The rotary kiln allows biomass carbonization in a wide range of temperature with efficient heat transfer and residence times in the order of minutes. In addition to the key advantages of biomass flexibility and biocarbon products diversity, the Tecnored Carbonization Plant was designed with high automation level and is able to be installed with modularity and portability. Besides to provide biocarbon to conventional steelmaking routes, the association of the Tecnored Carbonization and Smelter Technologies is a promising route to contribute for decarbonization of the iron and steelmaking industry.

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“…Fluidised bed reactors have been widely used in direct reduction processes and in the prereduction stage of the smelting reduction processes since 1960s, such as FIOR, FINMET, Circored, FINEX and DIOS. [1][2][3][4] Meanwhile, many laboratory investigations have been carried out on the reduction kinetics of fine iron ore particles with laboratory scale fluidised bed reactors. [5][6][7][8][9][10] The results were successfully applied to the actual plant.…”

Section: Introductionmentioning

confidence: 99%

Kinetic study on gas molten particle reduction of iron ore fines at high temperature

Yang

Zou

et al. 2015

Ironmaking & Steelmaking

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A kinetic study of gas molten particle reduction has been carried out using a high temperature drop tube furnace at the typical conditions of the smelting cyclone of the HIsarna ironmaking process. The results demonstrated that particle size has a significant effect on the reduction rate of fine iron ore particles and that the reduction ability of H 2 is two to three times higher than that of CO at high temperature. It was found that almost all of the Fe 2 O 3 in the iron ore particles was reduced to Fe 3 O 4 and FeO in the first 210 ms. The morphology images of the partially reduced spherical particles showed that a liquid FeO product layer was formed outside the solid Fe 3 O 4 unreacted core. The kinetic analysis revealed that the rate controlling step of the gas molten particle reduction was the diffusion of Fe 3þ in the liquid product layer and that the activation energy was ,156 kJ mol 21 .

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The Tecnored ironmaking process Part 1 – Competitiveness and pilot development work

Cited by 8 publications

References 1 publication

Mixing Behavior in a Side-Blown Vortex Smelting Reduction Reactor

Mixing Behavior in a Side-Blown Vortex Smelting Reduction Reactor

Tecnored Carbonization Process – A Novel Technology for Biocarbon Production

Kinetic study on gas molten particle reduction of iron ore fines at high temperature

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