System for producing silicon with improved resource utilization
OwnerJuergen Erwin Lang, Hartwig Rauleder +1inventors
InventorsJuergen Erwin Lang, Hartwig Rauleder, Bodo Frings
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Abstract
The present invention relates to a system for producing silicon, preferably high-purity silicon, particularly solar silicon, and to a method for producing silicon, preferably high-purity silicon, in particular solar silicon, in each case with particularly effective resource utilization and reduced emission of pollutants.
Claims20
A plant comprising at least one reactor (4.1) for the thermal conversion of carbon-containing compounds and at least one reactor for reducing metallic compounds (6.1), wherein the reactor (6.1) is supplied with carbon produced in the reactor (4.1), preferably in the form of at least one of carbon black, charcoal, and a pyrolysis product of at least one carbohydrate via a material stream (4.2), wherein silicon dioxide arises as a by-product in the reactor (4.1) via a material stream (4.3), and wherein a mixture of carbon monoxide and silicon monoxide arises as a by-product in the reactor (6.1) that is returned to the reactor (4.1) via a material stream (6.3).
A method of producing silicon, comprising:
- producing silicon dioxide in a reactor (4.1);
- and
- using the silicon dioxide for the thermal conversion of carbon-containing compounds for producing silicon by means of a reduction furnace (6.1).
Dependencies are inferred from the claim text.