GB546642A - Improvements in and relating to a method of treating magnesia - Google Patents
Improvements in and relating to a method of treating magnesiaInfo
- Publication number
- GB546642A GB546642A GB15402/40A GB1540240A GB546642A GB 546642 A GB546642 A GB 546642A GB 15402/40 A GB15402/40 A GB 15402/40A GB 1540240 A GB1540240 A GB 1540240A GB 546642 A GB546642 A GB 546642A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- iron oxide
- magnesia
- oct
- air
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
546,642. Refractory material. NORTON CO. Oct. 17, 1940, No. 15402. Convention date, Oct. 27, 1939. [Class 22] A refractory insulating material is made by heating magnesia contaminated with iron oxide to a temperature and for a period of time sufficient to cause the iron oxide to be absorbed in the magnesia crystal and then cooling the mass at a rate sufficient to prevent or minimize development of an external phase of iron oxide crystals, e.g. it is heated to 1200-1400‹C. for 24-72 hours and suddenly quenched in cold water or air or spread out as a shallow layer exposed to the air. The material may contain up to 3 per cent. of silica and up to 2 per cent. of lime. A magnesite ore containing less than 0.2 per cent. of iron as iron oxide may be used and this may be reduced to less than 0.1 per cent. by the process of Specification 546,641.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US546642XA | 1939-10-27 | 1939-10-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB546642A true GB546642A (en) | 1942-07-23 |
Family
ID=21992675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB15402/40A Expired GB546642A (en) | 1939-10-27 | 1940-10-17 | Improvements in and relating to a method of treating magnesia |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB546642A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2641530A (en) * | 1949-06-27 | 1953-06-09 | Kaiser Aluminium Chem Corp | Production of magnesia |
| US2691443A (en) * | 1949-10-12 | 1954-10-12 | Sylvester Processes Inc | Magnetic periclase preparation and separation |
| US3451773A (en) * | 1965-03-06 | 1969-06-24 | Dynamit Nobel Ag | Method of producing electromagnesia having improved electric insulating power |
| CN103922615A (en) * | 2014-03-27 | 2014-07-16 | 沈阳化工大学 | Method for preparing high-grade electrical-grade magnesium oxide from low-grade fused magnesium oxide |
-
1940
- 1940-10-17 GB GB15402/40A patent/GB546642A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2641530A (en) * | 1949-06-27 | 1953-06-09 | Kaiser Aluminium Chem Corp | Production of magnesia |
| US2691443A (en) * | 1949-10-12 | 1954-10-12 | Sylvester Processes Inc | Magnetic periclase preparation and separation |
| US3451773A (en) * | 1965-03-06 | 1969-06-24 | Dynamit Nobel Ag | Method of producing electromagnesia having improved electric insulating power |
| CN103922615A (en) * | 2014-03-27 | 2014-07-16 | 沈阳化工大学 | Method for preparing high-grade electrical-grade magnesium oxide from low-grade fused magnesium oxide |
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