METHOD FOR REFINING CRUDE SILICON MELTS USING A PARTICULATE MEDIATOR

The subject matter of the invention is a process for oxidatively refining a crude s i l i con melt in the preparation of industrial-grade silicon , i n which process during the refining stage a fine-partic l e mediat or with a particle s i ze parameter dso of between 1 a nd 200 mis added t hat conta...

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Bibliographic Details
Main Authors KONRAD MAUTNER, KARL-HEINZ RIMBCK
Format Patent
LanguageEnglish
Published 20.07.2024
Subjects
CHEMISTRY
COMPOUNDS THEREOF
FERROUS OR NON-FERROUS ALLOYS
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:The subject matter of the invention is a process for oxidatively refining a crude s i l i con melt in the preparation of industrial-grade silicon , i n which process during the refining stage a fine-partic l e mediat or with a particle s i ze parameter dso of between 1 a nd 200 mis added t hat contains a minimum content of metal l urgical si l icon of 8 mass% and at least one or more of t he element s H, C, 0 , F, Cl , Ca , Fe and Al, the fine-particle mediator being added to the crude silicon melt by pneumatic delivery using a gas .
Bibliography:Application Number: MY2021PI01805