GB924566A - Improvements in the production of borides, carbides and silicides - Google Patents

Improvements in the production of borides, carbides and silicides

Info

Publication number
GB924566A
GB924566A GB22091/60A GB2209160A GB924566A GB 924566 A GB924566 A GB 924566A GB 22091/60 A GB22091/60 A GB 22091/60A GB 2209160 A GB2209160 A GB 2209160A GB 924566 A GB924566 A GB 924566A
Authority
GB
United Kingdom
Prior art keywords
lumps
broken
fed
dried
earth metal
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
GB22091/60A
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.)
Elektroschmelzwerk Kempten GmbH
Original Assignee
Elektroschmelzwerk Kempten GmbH
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 Elektroschmelzwerk Kempten GmbH filed Critical Elektroschmelzwerk Kempten GmbH
Publication of GB924566A publication Critical patent/GB924566A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/653—Processes involving a melting step
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J19/087—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
    • B01J19/088—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/90—Carbides
    • C01B32/914—Carbides of single elements
    • C01B32/942—Calcium carbide
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/90—Carbides
    • C01B32/914—Carbides of single elements
    • C01B32/956—Silicon carbide
    • C01B32/963—Preparation from compounds containing silicon
    • C01B32/97—Preparation from SiO or SiO2
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/90—Carbides
    • C01B32/914—Carbides of single elements
    • C01B32/991—Boron carbide
    • 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
    • C01B35/00—Boron; Compounds thereof
    • C01B35/02—Boron; Borides
    • C01B35/04—Metal borides
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B3/00—Charging the melting furnaces
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/02—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating
    • C03B5/025—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating by arc discharge or plasma heating
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
    • C04B35/563—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on boron carbide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
    • C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
    • C04B35/573—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide obtained by reaction sintering or recrystallisation
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/80—Compositional purity

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Geology (AREA)
  • Toxicology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Furnace Details (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Ceramic Products (AREA)

Abstract

A process for the production of carbides, borides or silicides of elements of Group 3a and 4b of the Periodic Table according to Mendel<\>eeff wherein a charge comprising an intimate mixture of the raw materials from which the desired compound is formed is heated in an electric furnace is characterised in that there is incorporated in the mixture an additive consisting of an alkali or alkaline earth metal, or a compound of an alkali or alkaline earth metal, preferably in an amount of 0,01%-0,3% by weight, to increase the electrical conductivity of the vapour phase in the electric arc. A rare earth metal or compound may be used in place of or in addition to the above referred to additives. The mixture may be used as such, or may at least in part be moulded with the additive (either dry or moist) into lumps. In examples (1) boric acid and petroleum coke are mixed with caustic soda solution, formed into flat cakes, dried, and broken into pieces, and these pieces are then fed to an electric furnace, containing a bed of fused boron carbide, to give boron carbide, (2) sand and water glass are mixed with water, dried, broken up into lumps, and fed into the arc furnace to produce silicon carbide, and (3) boric acid, sand, carbon black, and caustic soda were mixed together with water, dried, broken up into lumps and fed into the furnace to obtain a uniformly fused block of the composition 23,5%C, 28,5%Si, 47,8%B. Aluminium boride may also be made.
GB22091/60A 1959-06-24 1960-06-23 Improvements in the production of borides, carbides and silicides Expired GB924566A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE17819A DE1191343B (en) 1959-06-24 1959-06-24 Process for the production of carbides, borides and silicides of III. and IV. Main group of the periodic system, the vapor phase of which in the arc conducts the electric current poorly

Publications (1)

Publication Number Publication Date
GB924566A true GB924566A (en) 1963-04-24

Family

ID=7069624

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22091/60A Expired GB924566A (en) 1959-06-24 1960-06-23 Improvements in the production of borides, carbides and silicides

Country Status (5)

Country Link
CH (1) CH440237A (en)
DE (1) DE1191343B (en)
GB (1) GB924566A (en)
NL (1) NL253033A (en)
SE (1) SE302448B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3332741A (en) * 1963-07-18 1967-07-25 Eugene T Teatum Crucible reactor and method

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB118591A (en) * 1917-08-02 1919-05-15 Norton Co Aluminous Abrasive and Process of Making same.
DE431759C (en) * 1925-03-13 1926-07-16 Alfred Reitz Extraction of silicon carbide from silica and coal
DE578375C (en) * 1930-11-11 1933-06-13 Stickstoffduenger Ag F Manufacture of calcium carbide
DE716760C (en) * 1933-09-22 1942-02-03 Norton Ges M B H Deutsche Process for the extraction of aluminum oxide with a high degree of purity in crystals of common abrasive grain sizes
US2285837A (en) * 1940-11-23 1942-06-09 Norton Co Method of producing the abrasive metal carbides
DE903271C (en) * 1943-06-11 1954-02-04 Vaw Ver Aluminium Werke Ag Process for the production of aluminum-silicon alloys
DE956579C (en) * 1951-07-30 1957-01-24 Air Reduction Process for preparing the input material for carbide production in an electric arc melting furnace
US2756126A (en) * 1951-09-29 1956-07-24 Zirconium Corp Of America Process for producing zirconium carbide
DE1020318B (en) * 1954-09-14 1957-12-05 Norton Ges M B H Deutsche Process for the production of boron carbide
GB822837A (en) * 1956-02-06 1959-11-04 Union Carbide Corp Compacts of finely divided material and method of forming same
US2883268A (en) * 1956-02-10 1959-04-21 Air Reduction Method of electric smelting reducible materials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3332741A (en) * 1963-07-18 1967-07-25 Eugene T Teatum Crucible reactor and method

Also Published As

Publication number Publication date
CH440237A (en) 1967-07-31
SE302448B (en) 1968-07-22
NL253033A (en)
DE1191343B (en) 1965-04-22

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