IE830678L - Manufacturing refractory magnesia-chromium products. - Google Patents
Manufacturing refractory magnesia-chromium products.Info
- Publication number
- IE830678L IE830678L IE830678A IE67883A IE830678L IE 830678 L IE830678 L IE 830678L IE 830678 A IE830678 A IE 830678A IE 67883 A IE67883 A IE 67883A IE 830678 L IE830678 L IE 830678L
- Authority
- IE
- Ireland
- Prior art keywords
- weight
- sio2
- magnesia
- content
- cao
- Prior art date
Links
- 229910052804 chromium Inorganic materials 0.000 title abstract 5
- 239000011651 chromium Substances 0.000 title abstract 5
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 10
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract 6
- 229910052681 coesite Inorganic materials 0.000 abstract 5
- 229910052906 cristobalite Inorganic materials 0.000 abstract 5
- 239000000377 silicon dioxide Substances 0.000 abstract 5
- 235000012239 silicon dioxide Nutrition 0.000 abstract 5
- 229910052682 stishovite Inorganic materials 0.000 abstract 5
- 229910052905 tridymite Inorganic materials 0.000 abstract 5
- 239000000203 mixture Substances 0.000 abstract 4
- 239000000395 magnesium oxide Substances 0.000 abstract 3
- 229910018404 Al2 O3 Inorganic materials 0.000 abstract 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract 2
- 229910019830 Cr2 O3 Inorganic materials 0.000 abstract 2
- 239000011449 brick Substances 0.000 abstract 2
- 229910017344 Fe2 O3 Inorganic materials 0.000 abstract 1
- 239000003518 caustics Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- 238000005245 sintering Methods 0.000 abstract 1
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
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
- C04B35/047—Refractories from grain sized mixtures containing chromium oxide or chrome ore
- C04B35/0476—Refractories from grain sized mixtures containing chromium oxide or chrome ore obtained from prereacted sintered grains ("simultaneous sinter")
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
1. Method of manufacturing magnesia-chromium refractory products by preparing a mixture of a caustically burned magnesia having a grain size of less than 0.2 mm, preferably at most 0.12 mm, and of fine grained chromium ore having a FeO content of 20 to 28 % by weight , in a ratio producing in the mixture a Cr2 O3 content of 10 to 30 % by weight, preferably 15 to 25 % by weight, and a Cr2 O3 /Al2 O3 weight ratio of more than 2.5 preferably more than 3, shaping the mixture into briquettes or shaped bodies and sintering the same at temperatures of at least 2 0008C, preferably at least 2 1008C, but without melting down, and further treating the resultant magnesia-chromium sinter material to obtain burned bricks by burning at temperatures of about 1 8008C or above as well as unburned bricks or refractory masses, characterized in that the caustic magnesia having a weight content of more than 97 % MgO, at most 0.2 % SiO2 , at most 0.7 % Fe2 O3 + Al2 , preferably at most 0.3 % Fe2 03 + Al2 O3 , at most 2 % CaO, and at most 0.06 % B2 O3 and the chromium ore having a grain size up to 1.5 mm and a weight content of at most 1.5 % SiO2 , preferably at most 1.0 % SiO2 , and at most 0.2 % CaO are used in such a ratio producing in the mixture a weight content of at most 1.1 % CaO and at most 0.7 % SiO2 , the sum of the weight content of CaO + SiO2 , however, not exceeding 1.3 %.
[EP0091704A1]
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0141082A AT373229B (en) | 1982-04-08 | 1982-04-08 | METHOD FOR PRODUCING A FIREPROOF MAGNESIACHROME SINTER MATERIAL |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE830678L true IE830678L (en) | 1983-10-08 |
| IE54202B1 IE54202B1 (en) | 1989-07-19 |
Family
ID=3513283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE678/83A IE54202B1 (en) | 1982-04-08 | 1983-03-28 | Method of manufacturing refractory magnesia-chromium product |
Country Status (14)
| Country | Link |
|---|---|
| EP (1) | EP0091704B1 (en) |
| JP (1) | JPS58185476A (en) |
| AT (1) | AT373229B (en) |
| BR (1) | BR8301745A (en) |
| CA (1) | CA1197267A (en) |
| DD (1) | DD209614A5 (en) |
| DE (1) | DE3364146D1 (en) |
| ES (1) | ES521297A0 (en) |
| GR (1) | GR78156B (en) |
| IE (1) | IE54202B1 (en) |
| IL (1) | IL68226A (en) |
| MX (1) | MX156507A (en) |
| TR (1) | TR21803A (en) |
| YU (1) | YU42620B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3527789C3 (en) * | 1985-08-02 | 1994-02-24 | Refratechnik Gmbh | Coarse ceramic molded body and its use |
| JPS63110929U (en) * | 1987-01-06 | 1988-07-16 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1571638B2 (en) * | 1966-12-24 | 1972-01-05 | International Minerals and Chemical Corp., Skokie, 111. (V.StA.) | METHOD OF MANUFACTURING A FIRE-RESISTANT BODY FROM A GRANULATED MIXTURE OF CHROME SPINEL AND PERICLAS |
| AT290374B (en) * | 1969-04-03 | 1971-05-25 | Oesterr Amerikan Magnesit | Process for the production of refractory chromium and chromium magnesite bricks |
| DE2015566C3 (en) * | 1969-05-15 | 1975-07-24 | General Refractories Co., Philadelphia, Pa. (V.St.A.) | Process for the production of directly bonded, refractory moldings |
| AT336478B (en) * | 1972-09-29 | 1977-05-10 | Veitscher Magnesitwerke Ag | METHOD OF MANUFACTURING FIRED REFRACTORY BRICKS |
| AT353154B (en) * | 1973-10-03 | 1979-10-25 | Pickford Holland & Company Lim | MATERIAL FOR THE MANUFACTURE OF REFRACTORY STONES AND THE LIKE |
| HU176631B (en) * | 1977-06-10 | 1981-03-28 | Veszpremi Vegyipari Egyetem | Process for preparing compact simultaneous sinters of direct bond |
-
1982
- 1982-04-08 AT AT0141082A patent/AT373229B/en not_active IP Right Cessation
-
1983
- 1983-03-24 IL IL68226A patent/IL68226A/en unknown
- 1983-03-25 EP EP83200420A patent/EP0091704B1/en not_active Expired
- 1983-03-25 DE DE8383200420T patent/DE3364146D1/en not_active Expired
- 1983-03-28 IE IE678/83A patent/IE54202B1/en unknown
- 1983-03-30 CA CA000424891A patent/CA1197267A/en not_active Expired
- 1983-04-04 GR GR70982A patent/GR78156B/el unknown
- 1983-04-06 BR BR8301745A patent/BR8301745A/en not_active IP Right Cessation
- 1983-04-06 YU YU808/83A patent/YU42620B/en unknown
- 1983-04-06 DD DD83249611A patent/DD209614A5/en not_active IP Right Cessation
- 1983-04-06 TR TR21803A patent/TR21803A/en unknown
- 1983-04-07 ES ES521297A patent/ES521297A0/en active Granted
- 1983-04-07 JP JP58061512A patent/JPS58185476A/en active Granted
- 1983-04-08 MX MX196873A patent/MX156507A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| MX156507A (en) | 1988-09-05 |
| BR8301745A (en) | 1983-12-13 |
| YU80883A (en) | 1986-02-28 |
| IL68226A0 (en) | 1983-06-15 |
| YU42620B (en) | 1988-10-31 |
| ATA141082A (en) | 1983-05-15 |
| GR78156B (en) | 1984-09-26 |
| ES8405749A1 (en) | 1984-06-16 |
| TR21803A (en) | 1985-07-18 |
| DE3364146D1 (en) | 1986-07-24 |
| EP0091704A1 (en) | 1983-10-19 |
| EP0091704B1 (en) | 1986-06-18 |
| CA1197267A (en) | 1985-11-26 |
| IE54202B1 (en) | 1989-07-19 |
| ES521297A0 (en) | 1984-06-16 |
| IL68226A (en) | 1986-03-31 |
| AT373229B (en) | 1983-12-27 |
| JPS6331428B2 (en) | 1988-06-23 |
| JPS58185476A (en) | 1983-10-29 |
| DD209614A5 (en) | 1984-05-16 |
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