CFD modelling of the effect of furnace crater pressure on the melt and gas flows in the submerged arc furnaces used for silicon production

Kadkhodabeigi, Mehdi; Tveit, Halvard; Johansen, Stein Tore

doi:10.1504/pcfd.2010.035371

Cited by 7 publications

(7 citation statements)

References 3 publications

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“…[7] through [13] with reaction rates described in Section II-H, in addition to the no voids condition [16], the temperature Eq. [17], and the constant sum of partial pressures [14].…”

Section: J Boundary and Initial Conditionsmentioning

confidence: 99%

“…[7]- [11] for the evolution of the solid and liquid concentrations. Since we take U s ¼ 0, this gives k c ¼ 0 and hence z ¼ constant.…”

Section: J Boundary and Initial Conditionsmentioning

confidence: 99%

“…To produce silicon, a submerged-arc furnace [1][2][3] is continually fed with carbon and quartz. [1,[4][5][6] Liquid silicon is tapped from the base of the furnace [1,4,5,7] and undergoes further processes to produce silicon with the desired purity and size distribution for the customers' needs. The hot off-gases that rise through the furnace are cooled, extracted, and filtered.…”

Section: Introductionmentioning

confidence: 99%

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A Heat and Mass Transfer Model of a Silicon Pilot Furnace

Sloman

Please

Gorder

et al. 2017

Metall Mater Trans B

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The most common technological route for metallurgical silicon production is to feed quartz and a carbon source (e.g., coal, coke, or charcoal) into submerged-arc furnaces, which use electrodes as electrical conductors. We develop a mathematical model of a silicon furnace. A continuum approach is taken, and we derive from first principles the equations governing the time evolution of chemical concentrations, gas partial pressures, velocity, and temperature within a one-dimensional vertical section of a furnace. Numerical simulations are obtained for this model and are shown to compare favorably with experimental results obtained using silicon pilot furnaces. A rising interface is shown to exist at the base of the charge, with motion caused by the heating of the pilot furnace. We find that more reactive carbon reduces the silicon monoxide losses, while reducing the carbon content in the raw material mixture causes greater solid and liquid material to build-up in the charge region, indicative of crust formation (which can be detrimental to the silicon production process). We also comment on how the various findings could be relevant for industrial operations.

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“…[7] through [13] with reaction rates described in Section II-H, in addition to the no voids condition [16], the temperature Eq. [17], and the constant sum of partial pressures [14].…”

Section: J Boundary and Initial Conditionsmentioning

confidence: 99%

“…[7]- [11] for the evolution of the solid and liquid concentrations. Since we take U s ¼ 0, this gives k c ¼ 0 and hence z ¼ constant.…”

Section: J Boundary and Initial Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Heat and Mass Transfer Model of a Silicon Pilot Furnace

Sloman

Please

Gorder

et al. 2017

Metall Mater Trans B

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“…9) When the tapping flow rate drops gas starts to emerge from the taphole. After this initiation of two phase flow from the tap hole, the gas flow rate increases as the tapping process pro-© 2011 ISIJ ceeds.…”

Section: Investigation Of the Effect Of Crater Pressurementioning

confidence: 99%

Modelling the Tapping Process in Submerged Arc Furnaces Used in High Silicon Alloys Production

2011

Self Cite

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“…Although the thermodynamic process of the combustion was very complicated, the process of combustion still followed the mass conservation law and energy conservation law as follows: [13][14][15][16][17] …”

Section: Object Mechanism Analysismentioning

confidence: 99%

A Real Time Multi-Scale Correlation Analysis Method and its Application on the Data Mining in Thermodynamic Process

Wang

Liu

2011

2011 Seventh International Conference on Computational Intelligence and Security

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There is a complicated mapping between the state and measurement signal in the complex thermodynamic system, direct mechanism analysis is very difficult. Using wavelet analysis idea for reference, simple filter bank was designed to decompose the signal by frequency domain. The correlation feature of signals in different frequency scale can be discovered. Using such method to analyze furnace pressure signal of boiler in thermal power plant, the positive correlation between the low-frequency component of furnace pressure signal and the medium-frequency component of fuel was revealed; and the negative correlation between the highfrequency component variance of furnace pressure signal and the low-frequency component of fuel was discovered. Through further mechanism analysis the conclusion is that: the furnace pressure can reflect the change of the furnace temperature in medium-frequency; the intensification of the furnace pressure and furnace temperature fluctuation in boiler under low load condition is cased by the nonlinearity of object itself.

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CFD modelling of the effect of furnace crater pressure on the melt and gas flows in the submerged arc furnaces used for silicon production

Cited by 7 publications

References 3 publications

A Heat and Mass Transfer Model of a Silicon Pilot Furnace

A Heat and Mass Transfer Model of a Silicon Pilot Furnace

Modelling the Tapping Process in Submerged Arc Furnaces Used in High Silicon Alloys Production

A Real Time Multi-Scale Correlation Analysis Method and its Application on the Data Mining in Thermodynamic Process

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