GB529614A - Process for the production of granular calcium brucite - Google Patents
Process for the production of granular calcium bruciteInfo
- Publication number
- GB529614A GB529614A GB1642739A GB1642739A GB529614A GB 529614 A GB529614 A GB 529614A GB 1642739 A GB1642739 A GB 1642739A GB 1642739 A GB1642739 A GB 1642739A GB 529614 A GB529614 A GB 529614A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydration
- brucite
- cold water
- lime
- rock
- 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
- 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
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/102—Preheating, burning calcining or cooling of magnesia, e.g. dead burning
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
529,614. Magnesium and calcium oxides. GOUDGE, M. F. June 5, 1939, No. 16427. [Class 1 (iii)] Substantially dehydrated magnesia, of high purity containing traces of lime, silica, iron &c. is produced by calcining at 120D-1300‹C. in vertical or rotary lime kilns calcite rock matrix, e.g. Predazzites and Pencatites, containing brucite granules of distinctive scaly structure, and slaking with cold water. Hydration of the calcined brucite is minimized by keeping the temperature below 120‹C. Dry disrupted limepowder is air-separated and lime adhering to the magnesia granules which retain the distinctive structure is rapidly washed off with cold water. Screening, tabling, jigging &c. to remove coarser impurities is unnecessary for most good grade rock. Rotary drying at 400-500‹C. removes undesired hydration while 2 hours hot water washing secures complete hydration. Rock containing dolomite is calcined not above 1000‹C. to prevent dead-burning which causes abnormal hydration. Dead burning effects may be overcome by rotary drying the slaked product at 500‹C. and re-hydrating with cold water.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1642739A GB529614A (en) | 1939-06-05 | 1939-06-05 | Process for the production of granular calcium brucite |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1642739A GB529614A (en) | 1939-06-05 | 1939-06-05 | Process for the production of granular calcium brucite |
Publications (1)
Publication Number | Publication Date |
---|---|
GB529614A true GB529614A (en) | 1940-11-25 |
Family
ID=10077120
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1642739A Expired GB529614A (en) | 1939-06-05 | 1939-06-05 | Process for the production of granular calcium brucite |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB529614A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3133792A (en) * | 1964-05-19 | Slip cast calcined magnesia products | ||
US3322502A (en) * | 1963-09-24 | 1967-05-30 | Aluminium Lab Ltd | Magnesium hydroxide and method of preparation |
US4335083A (en) * | 1981-03-05 | 1982-06-15 | Carey Canada Inc. | Method for leaching magnesium from magnesium hydroxide-containing composition |
-
1939
- 1939-06-05 GB GB1642739A patent/GB529614A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3133792A (en) * | 1964-05-19 | Slip cast calcined magnesia products | ||
US3322502A (en) * | 1963-09-24 | 1967-05-30 | Aluminium Lab Ltd | Magnesium hydroxide and method of preparation |
US4335083A (en) * | 1981-03-05 | 1982-06-15 | Carey Canada Inc. | Method for leaching magnesium from magnesium hydroxide-containing composition |
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