GB872995A - Process for purifying silicon or a ferro-silicon alloy - Google Patents

Process for purifying silicon or a ferro-silicon alloy

Info

Publication number
GB872995A
GB872995A GB3436057A GB3436057A GB872995A GB 872995 A GB872995 A GB 872995A GB 3436057 A GB3436057 A GB 3436057A GB 3436057 A GB3436057 A GB 3436057A GB 872995 A GB872995 A GB 872995A
Authority
GB
United Kingdom
Prior art keywords
silicon
ferro
molten silicon
oxygen
oxidised
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3436057A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pechiney SA
Original Assignee
Pechiney SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pechiney SA filed Critical Pechiney SA
Publication of GB872995A publication Critical patent/GB872995A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/02—Silicon
    • C01B33/037—Purification
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/02—Silicon
    • C01B33/021—Preparation
    • C01B33/023—Preparation by reduction of silica or free silica-containing material
    • C01B33/025—Preparation by reduction of silica or free silica-containing material with carbon or a solid carbonaceous material, i.e. carbo-thermal process
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/06—Metal silicides

Abstract

Molten silicon or ferro-silicon of more than 95% purity is purified by intimate contact with an oxygen-containing gas, optionally in the presence of a flux, e.g. an alkali metal salt. Titanium, iron, aluminium, calcium, and carbon may thereby be oxidised. The oxidised metal impurities may be removed as a surface slag. Purification may be effected by bubbling air or oxygen through the molten silicon from a graphite tube, or by directing a flame produced by burning oil in an excess of air into a vessel being filled with molten silicon from a production furnace (the Figure, not shown).
GB3436057A 1956-11-05 1957-11-04 Process for purifying silicon or a ferro-silicon alloy Expired GB872995A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR725075 1956-11-05

Publications (1)

Publication Number Publication Date
GB872995A true GB872995A (en) 1961-07-19

Family

ID=8703933

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3436057A Expired GB872995A (en) 1956-11-05 1957-11-04 Process for purifying silicon or a ferro-silicon alloy

Country Status (3)

Country Link
CH (1) CH378864A (en)
DE (1) DE1064486B (en)
GB (1) GB872995A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3325278A (en) * 1964-05-07 1967-06-13 Union Carbide Corp Alloy purification process

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1461308A (en) * 1959-11-12 1966-02-25 Electrometallurgique De Montri Process for refining metals, metalloids and alloys

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL88607C (en) * 1948-12-29
GB690243A (en) * 1950-11-21 1953-04-15 Westinghouse Brake & Signal Improvements relating to processes for the preparation of germanium rectifier crystals and rectifier crystals prepared thereby
GB749423A (en) * 1953-10-02 1956-05-23 Standard Telephones Cables Ltd Method of refining silicon
GB797374A (en) * 1954-10-08 1958-07-02 Columbian Carbon Improvements in silicon containing pigment and process for its production

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3325278A (en) * 1964-05-07 1967-06-13 Union Carbide Corp Alloy purification process

Also Published As

Publication number Publication date
CH378864A (en) 1964-06-30
DE1064486B (en) 1959-09-03

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