Developing a Unidimensional Simulation Model for Producing Silicon in an Electric Furnace

Halvorsen, Svenn Anton; Downing, James H.; Schei, A.

doi:10.1007/978-94-009-0703-4_36

Cited by 6 publications

(9 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For simplicity, we will follow the approach used in the dynamic model of Halvorsen et al [4] by assuming that the total pressure is constant. This constant, called P TOT , is set to 1 bar.…”

Section: E Constant Total Pressurementioning

confidence: 99%

“…The functional dependence of the rate of each reaction was chosen after taking ideas from relevant literature [4,12,13] and the simulator SiMod. [11] Wiik [13] discusses many factors that can influence kinetic rates including the crystal structure, level of impurities, porosity, and grain size of both the quartz and the carbon used.…”

Section: H Reaction Kineticsmentioning

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%

“…The model uses lumped parameters, which represent a range of physical parameters, and considers the steady state, but not how the furnace moves to this condition. The dynamic model, developed by Halvorsen et al, [4] discretizes the furnace height into several zones. Reactions take place in each zone and material and enthalpy transfers between zones at each timestep.…”

Section: Introductionmentioning

confidence: 99%

“…This model is the basis for the simulator SiMod-'a Silicon Furnace Process Model.' [11] Kinetic parameters used in the dynamic model [4] and SiMod [11] are not found experimentally, but rather are chosen in order to produce sensible results that compare well with observations in industrial furnaces. Valuable background about the chemical species present in the furnace is given in Reference 12 and the relevant kinetics are discussed in Reference 13.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A Heat and Mass Transfer Model of a Silicon Pilot Furnace

Sloman

Please

Gorder

et al. 2017

Metall Mater Trans B

View full text Add to dashboard Cite

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.

show abstract

Section: E Constant Total Pressurementioning

confidence: 99%