DE2055564

1335351 Production of silicon UNION CARBIDE CORP 18 Nov 1970 [19 Nov 1969] 54740/70 Heading C1A A process for the electric arc furnace production of silicon by carbothermic reduction of silica comprises using an agglomerated homogeneous mixture of a particulate carbonaceous reducing agent, particula...

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Main Authors MCCLINCY, RICHARD JOSEPH, TUCSON, ARIZ, DOWNING, JAMES HERBERT, CLARENCE, WILSON, BENJAMIN JOHN, YOUNGSTOWN
Format Patent
LanguageEnglish
Published 03.01.1974
Edition1
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:1335351 Production of silicon UNION CARBIDE CORP 18 Nov 1970 [19 Nov 1969] 54740/70 Heading C1A A process for the electric arc furnace production of silicon by carbothermic reduction of silica comprises using an agglomerated homogeneous mixture of a particulate carbonaceous reducing agent, particulate silica and a bulking agent wherein the fixed carbon contents of said carbonaceous reducing agent comprise between 85 and 115% of the amount stoichiometrically required for the reduction of silica according to the reaction SiO 2 + 2C# Si + 2CO wherein the particulate silica comprises a fine fraction and a coarse fraction, wherein said fine fraction of silica is substantially sized 48 mesh and finer and said coarse fraction is between 3À175 millimeter and 12À7 miillimeter and the ratio by weight of the fine fraction to the coarse fraction is between ¢ and 2 and wherein said agglomerated furnace charge has a density between 0À32 and 0À80 g./cc. The furnace charge is also claimed per se. Preferably the particulate carbonaceous reducing agent is sized substantially 100 mesh and finer.
Bibliography:Application Number: DE19702055564