GB1095871A - Process for the manufacture of compacted bodies of calcined magnesia - Google Patents
Process for the manufacture of compacted bodies of calcined magnesiaInfo
- Publication number
- GB1095871A GB1095871A GB1255465A GB1255465A GB1095871A GB 1095871 A GB1095871 A GB 1095871A GB 1255465 A GB1255465 A GB 1255465A GB 1255465 A GB1255465 A GB 1255465A GB 1095871 A GB1095871 A GB 1095871A
- Authority
- GB
- United Kingdom
- Prior art keywords
- firing
- burnt magnesia
- refractories
- dead
- heated
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/02—Magnesia
- C01F5/06—Magnesia by thermal decomposition of magnesium compounds
- C01F5/08—Magnesia by thermal decomposition of magnesium compounds by calcining magnesium hydroxide
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Semi-burnt magnesia compacts suitable for further processing into low-porosity refractories, are produced by firing magnesium hydroxide under a pressure sufficient and so applied as to maintain it in a compact shape, up to a sufficiently high temperature and for sufficient time to completely calcine it to magnesium oxide but to leave the latter substantially unsintered. The firing may be continued to a final temperature of 1000 DEG C. and the compacting pressure 1-100 kg./cm2. The compacting may be effected in that the mass being heated is kept under substantially constant pressure in a mould or in that the wax is heated while it is being extruded. The magnesium hydroxide starting material may be admixed with up to 40% by weight based on the weight of the mixture of active or dead-burnt magnesia and also with a plasticizer, e.g. alkali metal salts such as sodium chloride and readily decomposable magnesium salts such as the chloride or sulphate. The compacted shape may be that which it is desired to preserve in subsequent firing operations, e.g. conversion into dead-burnt magnesia and then to refractories. Alternatively, the compacts may be broken up into grog for further processing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IL2117964 | 1964-04-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1095871A true GB1095871A (en) | 1967-12-20 |
Family
ID=11043292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1255465A Expired GB1095871A (en) | 1964-04-15 | 1965-03-24 | Process for the manufacture of compacted bodies of calcined magnesia |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE1646673A1 (en) |
| ES (1) | ES311764A1 (en) |
| GB (1) | GB1095871A (en) |
| NL (1) | NL6504911A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0140221A2 (en) * | 1983-10-31 | 1985-05-08 | Shin Nihon Chemical Industry Co., Ltd. | Magnesia clinker and method of producing the same |
-
1965
- 1965-03-24 GB GB1255465A patent/GB1095871A/en not_active Expired
- 1965-04-13 ES ES0311764A patent/ES311764A1/en not_active Expired
- 1965-04-14 DE DE19651646673 patent/DE1646673A1/en active Pending
- 1965-04-15 NL NL6504911A patent/NL6504911A/xx unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0140221A2 (en) * | 1983-10-31 | 1985-05-08 | Shin Nihon Chemical Industry Co., Ltd. | Magnesia clinker and method of producing the same |
| EP0140221A3 (en) * | 1983-10-31 | 1987-01-07 | Shin Nihon Chemical Industry Co., Ltd. | Magnesia clinker and method of producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1646673A1 (en) | 1971-10-07 |
| NL6504911A (en) | 1965-10-18 |
| ES311764A1 (en) | 1965-07-01 |
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