Traçages dans la sidérurgie

Nicolle, Rémy; Steiler, J.M.; Wanin, M.

doi:10.1051/metal/200097010061

Cited by 2 publications

(2 citation statements)

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“…10,11 With the objective to develop new tools to improve gas distribution monitoring, the helium tracing technique has been tested 12 and is employed to monitor the gas transfer time from tuyere to the burden probe. The analysis of this transfer time from the tuyere to the top and its relationship with the process will be explained.…”

Section: Introductionmentioning

confidence: 99%

“…Several indirect measurements (thermal losses, gas analysis and temperature recorded by burden probes) help to capture information of the gas distribution in the furnace. 10,11 With the objective to develop new tools to improve gas distribution monitoring, the helium tracing technique has been tested 12 and is employed to monitor the gas transfer time from tuyere to the burden probe. The analysis of this transfer time from the tuyere to the top and its relationship with the process will be explained.…”

Section: Introductionmentioning

confidence: 99%

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Extended use of helium tracing technique and assessment of blast furnace shaft permeability

Carrascal¹,

Barea²,

Martín³

et al. 2008

Ironmaking & Steelmaking

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The blast furnace is a countercurrent reactor in which a reducing gas is produced by coke gasification with the oxygen blown in via tuyeres. The reducing gas flows upwards, reducing the iron ores charged at the top of the furnace. It is a very complex process with many influencing and correlating factors. Its productivity is the quotient between possible gas throughput per unit of time and required specific gas generation for 1 tonne of hot metal obtained, and its permeability is a measure of the gas ability to pass through the bed of solid materials. The objective of 'high levels of injection of pulverised coal' is not only compatible with productivity, but also even necessary to increase blast furnace productivity. In this sense the helium tracing technique consists of injecting He at the tuyeres with its arrival at the blast furnace top being detected by a mass spectrometer. With this measurement it is possible to define the transfer time as the delay between the injection moment and the time when the helium concentration reaches 10% of the maximum detected level. Calculated variables from the measurements allow a concise characterisation of the blast furnace state. These gas transfer measurements can be considered as a new tool to evaluate the state of a furnace at a specific moment. The main advantage will be that by employing only one measurement it will be possible to evaluate the furnace state.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Extended use of helium tracing technique and assessment of blast furnace shaft permeability

Carrascal¹,

Barea²,

Martín³

et al. 2008

Ironmaking & Steelmaking

View full text Add to dashboard Cite

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Surface Treatments and Coatings in the Steelmaking Industry – from Metallurgy to Processing

Nicolle¹,

Guttmann²

2001

Surface Engineering

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This review presents the main trends and achievements in the field of steel surface treatments, from metallurgy to processing. Development of new surface observation methods, by improvement of resolution and structure quantification, have led to a better insight into the metallurgy and physical chemistry of surfaces and to a detailed description of reactions. Reaction kinetics have been derived from numerous in situ kinetics experiments resulting in fine reaction and reactor modelling. Industrial operation of surface treatments has been characterised through direct measurements, residence time distribution (RTD), and cold models or hot pilots. They give important information for the validation of computation fluid dynamics (CFD) models. Such measurements of temperature, fluid composition, and velocity will confirm the local distribution of the process variables. All these results are being integrated into online process simulators for fully controlled surface treatments.

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Traçages dans la sidérurgie

Cited by 2 publications

References 0 publications

Extended use of helium tracing technique and assessment of blast furnace shaft permeability

Extended use of helium tracing technique and assessment of blast furnace shaft permeability

Surface Treatments and Coatings in the Steelmaking Industry – from Metallurgy to Processing

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