JPS55162426A - Manufacture of alpha-type hemihydrate gypsum - Google Patents
Manufacture of alpha-type hemihydrate gypsumInfo
- Publication number
- JPS55162426A JPS55162426A JP7039279A JP7039279A JPS55162426A JP S55162426 A JPS55162426 A JP S55162426A JP 7039279 A JP7039279 A JP 7039279A JP 7039279 A JP7039279 A JP 7039279A JP S55162426 A JPS55162426 A JP S55162426A
- Authority
- JP
- Japan
- Prior art keywords
- gypsum
- slurry
- type hemihydrate
- hemihydrate gypsum
- magnesium sulfate
- 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.)
- Granted
Links
Abstract
PURPOSE: To form α-type hemihydrate gypsum having high mechanical strength in hydration curing without using an org. habit modifier by hydrothermally treating a gypsum slurry and magnesium sulfate under suitable operational conditions.
CONSTITUTION: Finely powdered natural gypsum or chemical gypsum as starting material is fed into a completely mixing system converter together with magnesium sulfate 1W10% and fresh water so that the gypsum concn. of the resulting slurry becomes 15W50wt%. By continuously converting the slurry at a slurry temp. of 110W150°C for an average retention time of 3W7hr enlarged prismatic crystals of α-type hemihydrate gypsum with a length to diameter ratio of about 5W15 are stably formed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7039279A JPS55162426A (en) | 1979-06-05 | 1979-06-05 | Manufacture of alpha-type hemihydrate gypsum |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7039279A JPS55162426A (en) | 1979-06-05 | 1979-06-05 | Manufacture of alpha-type hemihydrate gypsum |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55162426A true JPS55162426A (en) | 1980-12-17 |
JPS6353142B2 JPS6353142B2 (en) | 1988-10-21 |
Family
ID=13430118
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7039279A Granted JPS55162426A (en) | 1979-06-05 | 1979-06-05 | Manufacture of alpha-type hemihydrate gypsum |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55162426A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63274615A (en) * | 1987-05-06 | 1988-11-11 | Mitsubishi Heavy Ind Ltd | Manufacture of alpha-type gypsum hemihydrate |
US5639298A (en) * | 1995-11-27 | 1997-06-17 | Air Products And Chemicals, Inc. | Modified gypsum compositions |
CN104262850A (en) * | 2014-09-30 | 2015-01-07 | 华中师范大学 | Alpha-hemihydrate gypsum/polyvinyl chloride ordered composite material and preparation method thereof |
-
1979
- 1979-06-05 JP JP7039279A patent/JPS55162426A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63274615A (en) * | 1987-05-06 | 1988-11-11 | Mitsubishi Heavy Ind Ltd | Manufacture of alpha-type gypsum hemihydrate |
US5639298A (en) * | 1995-11-27 | 1997-06-17 | Air Products And Chemicals, Inc. | Modified gypsum compositions |
CN104262850A (en) * | 2014-09-30 | 2015-01-07 | 华中师范大学 | Alpha-hemihydrate gypsum/polyvinyl chloride ordered composite material and preparation method thereof |
Also Published As
Publication number | Publication date |
---|---|
JPS6353142B2 (en) | 1988-10-21 |
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